Drop support for IE 6-7 and Firefox 29. Fixes #89

47 files changed, 42 insertions, 3962 deletions

diff --git a/README.md b/README.md
index 943693d..2f3d468 100644
--- a/README.md
+++ b/README.md
@@ -12,14 +12,12 @@ Ruby Sass 3.2 + Compass 0.12 | [2.2.0+normalize.2.1.3](https://github.com/JohnAl
 
 __This project is the Sass version of Normalize.css__, a collection of HTML element and attribute rulesets to normalize styles across all browsers. This port aims to use a light dusting of Sass to make Normalize even easier to integrate with your website. To learn about why Normalize.css is so amazing, skip to the "normalize.css" section below.
 
-This Sass port currently utilizes:
+This Sass port currently adds:
 
-* Browser support variables: Allowing you to easily add/drop support for any browser by modifying a single Sass variable.
 * Vertical rhythm mixins: Allowing you to alter the font-size, line-height and margins in Normalize’s output without hacking the library.
+* Optional Eyeglass support.
 
-In addition, Normalize.css has 2 major versions: version 4 (without “legacy browser” support) and version 1 (with support for IE 6/7, etc.) This Sass port combines the two versions into one file so that you can easily toggle between the two versions using its browser support variables.
-
-Did a client wait until the last minute to mention their CEO uses IE 6? Simply update your `$support-for` variable and recompile your Sass files. Details can be found at https://github.com/JohnAlbin/normalize-scss/wiki
+In addition, Normalize.css has 2 major versions: version 4 (without “legacy browser” support) and version 1. This Sass port combines the two versions into one file so that you can easily toggle between the two versions.
 
 # normalize.css v4
 
@@ -63,7 +61,6 @@ __Approach 1:__ Download and use normalize-scss as a starting point for your own
     * [fork-versions/ruby-sass-compass](fork-versions/ruby-sass-compass) - Fork for Ruby Sass with Compass
     * [fork-versions/typey](fork-versions/typey) - Fork with Typey
     * [fork-versions/typey-chroma-kss](fork-versions/typey-chroma-kss) - Fork with Typey, Chroma and KSS
-  2. The normalize-scss code uses the `support-for` module, so add it
 
 __Approach 2:__ Install and include normalize-scss untouched and then build upon it, overriding the defaults later in your Sass when necessary. Just import normalize-scss like any normal Sass module by:
   1. Set variables to override the default normalize-scss variables.
@@ -79,16 +76,13 @@ Note: if you use [wiredep](https://github.com/taptapship/wiredep), normalize-scs
 
 ## Browser support
 
-* Chrome (last two)
-* Edge (last two)
-* Firefox (last two)
+* Chrome (last four)
+* Edge (version 25 and later)
+* Firefox (last four)
 * Firefox ESR
-* Internet Explorer 6+
-* Opera (last two)
-* Safari 6+
-
-The exact browsers supported in your project is controlled by the browser
-support variables. See https://github.com/JohnAlbin/normalize-scss/wiki
+* Internet Explorer 9+
+* Opera (last four)
+* Safari (last four)
 
 
 ## Extended details and known issues
diff --git a/fork-versions/default/README.md b/fork-versions/default/README.md
index a6f6a4e..83573f1 100644
--- a/fork-versions/default/README.md
+++ b/fork-versions/default/README.md
@@ -1,53 +1,7 @@
 # Fork-able normalize-scss<br> for libSass or Ruby Sass
 
-## Using with node-sass
+## Using with node-sass or libSass or Ruby Sass
 
 1. Copy these files to your Sass project.
-2. This fork-able version requires the [support-for](https://github.com/JohnAlbin/support-for) Sass module. Add it to your package.json with:
-
- ```bash
-npm install --save-dev support-for
-```
-
-3. Add support-for's `sass` directory to your nodeSass' [`includePaths` option](https://github.com/sass/node-sass#includepaths).
-
- ```js
-var sass = require('node-sass'),
-  path = require('path');
-
-sass.render({
-  file: scss_filename,
-  includePaths: [
-    path.dirname(require.resolve('support-for'))
-  ]
-}, function(err, result) { /*...*/ });
-```
-
-## Using with libSass
-
-If you are not using node-sass with libSass, you probably already know how to include 3rd party libraries into your Sass project.
-
-1. Copy these files to your Sass project.
-2. This fork-able version requires the [support-for](https://github.com/JohnAlbin/support-for) Sass module. Add support-for's `sass` directory to your libSass include paths in the "usual way".
-
-## Using with Ruby Sass
-
-In addition to copying these files to your Sass project, you'll also need to:
-
-1. Edit your `Gemfile` file to add:
-
- ```ruby
-gem 'support-for', '~> 1.0'
-```
-
-2. If you use Compass, edit your `config.rb` file to add:
-
- ```ruby
-require 'support-for'
-```
-
-3. Update your local Gems with:
-
- ```
-bundle install
-```
+2. Start forking by altering/moving Sass variables found in `_variables.scss`.
+3. Edit any CSS ruleset directly rather than overriding it in later Sass.
diff --git a/fork-versions/default/_normalize.scss b/fork-versions/default/_normalize.scss
index cf14a9e..d138f0c 100644
--- a/fork-versions/default/_normalize.scss
+++ b/fork-versions/default/_normalize.scss
@@ -1,7 +1,6 @@
 /*! normalize-scss | MIT/GPLv2 License | bit.ly/normalize-scss */
 
 @import 'variables';
-@import 'support-for';
 @import 'vertical-rhythm';
 
 // If we've customized any font variables, we'll need extra properties.
@@ -24,9 +23,9 @@
  */
 
 html {
-  @if $normalize-vertical-rhythm or support-for(ie, 7) {
-    // Correct text resizing oddly in IE 6/7 when body `font-size` is set using
-    // `em` units.
+  @if $normalize-vertical-rhythm {
+    // Correct old browser bug that prevented accessible resizing of text
+    // when root font-size is set with px or em.
     font-size: ($base-font-size / 16px) * 100%;
   }
   @if $normalize-vertical-rhythm {
@@ -78,10 +77,6 @@ canvas,
 progress,
 video {
   display: inline-block;
-  @if support-for(ie, 7) {
-    *display: inline;
-    *zoom: 1;
-  }
 }
 
 /**
@@ -176,9 +171,6 @@ code,
 kbd,
 samp {
   font-family: monospace, monospace; /* 1 */
-  @if support-for(ie, 6) {
-    _font-family: 'courier new', monospace;
-  }
   font-size: 1em; /* 2 */
 }
 
@@ -205,7 +197,7 @@ h1 {
   @include normalize-margin(1 0, $h1-font-size);
 }
 
-@if $normalize-vertical-rhythm or support-for(ie, 7) {
+@if $normalize-vertical-rhythm {
   h2 {
     @include normalize-font-size($h2-font-size);
     @if $normalize-vertical-rhythm {
@@ -294,10 +286,6 @@ sup {
 
 img {
   border-style: none;
-  @if support-for(ie, 7) {
-    /* Improve image quality when scaled in IE 7. */
-    -ms-interpolation-mode: bicubic;
-  }
 }
 
 /**
@@ -311,7 +299,7 @@ svg:not(:root) {
 /* Grouping content
    ========================================================================== */
 
-@if $normalize-vertical-rhythm or support-for(ie, 7) {
+@if $normalize-vertical-rhythm {
   /**
    * Set 1 unit of vertical rhythm on the top and bottom margin.
    */
@@ -320,10 +308,6 @@ svg:not(:root) {
     @include normalize-margin(1 $indent-amount);
   }
 
-  /**
-   * Address margins set differently in IE 6/7.
-   */
-
   dl,
   menu,
   ol,
@@ -349,10 +333,6 @@ svg:not(:root) {
     margin: 0 0 0 $indent-amount;
   }
 
-  /**
-   * Address paddings set differently in IE 6/7.
-   */
-
   menu,
   ol,
   ul {
@@ -360,18 +340,6 @@ svg:not(:root) {
   }
 }
 
-@if support-for(ie, 7) {
-  /**
-   * Correct list images handled incorrectly in IE 7.
-   */
-
-  nav ul,
-  nav ol {
-    list-style: none;
-    list-style-image: none;
-  }
-}
-
 /**
  * Add the correct margin in IE 8.
  */
@@ -391,7 +359,7 @@ hr {
   overflow: visible; /* 2 */
 }
 
-@if $normalize-vertical-rhythm or support-for(ie, 7) {
+@if $normalize-vertical-rhythm {
   /**
    * Set 1 unit of vertical rhythm on the top and bottom margin.
    */
@@ -429,21 +397,9 @@ pre {
  *   on when it has padding (and textfield appearance).
  */
 
-@if support-for(ie, 7) {
-  /**
-   * Correct margin displayed oddly in IE 6/7.
-   */
-
-  form {
-    margin: 0;
-  }
-}
-
 /**
  * 1. Change font properties to `inherit` in all browsers (opinionated).
  * 2. Remove the margin in Firefox and Safari.
- * 3. Address `font-family` inconsistency between `textarea` and other form in IE 7
- * 4. Improve appearance and consistency with IE 6/7.
  */
 
 button,
@@ -453,10 +409,6 @@ select,
 textarea {
   font: inherit; /* 1 */
   margin: 0; /* 2 */
-  @if support-for(ie, 7) {
-    *font-family: $base-font-family; /* 3 */
-    *vertical-align: middle; /* 4 */
-  }
 }
 
 /**
@@ -519,27 +471,17 @@ button,
 
 input {
   overflow: visible;
-  @if support-for(firefox, 29) {
-    // Firefox sets `line-height` using `!important` in the UA stylesheet.
-    line-height: normal;
-  }
 }
 
 /**
  * 1. Add the correct box sizing in IE <11.
  * 2. Remove the padding in IE <11.
- * 3. Remove excess padding in IE 7.
- *    Known issue: excess padding remains in IE 6.
  */
 
 [type="checkbox"],
 [type="radio"] {
   box-sizing: border-box; /* 1 */
   padding: 0; /* 2 */
-  @if support-for(ie, 7) {
-    *height: 13px; /* 3 */
-    *width: 13px; /* 3 */
-  }
 }
 
 /**
@@ -604,7 +546,6 @@ fieldset {
  * 2. Correct the color inheritance from `fieldset` elements in IE.
  * 3. Remove the padding so developers are not caught out when they zero out
  *    `fieldset` elements in all browsers.
- * 4. Correct alignment displayed oddly in IE 6/7.
  */
 
 legend {
@@ -614,9 +555,6 @@ legend {
   white-space: normal; /* 1 */
   color: inherit; /* 2 */
   padding: 0; /* 3 */
-  @if support-for(ie, 7) {
-    *margin-left: -7px; /* 4 */
-  }
 }
 
 /**
diff --git a/fork-versions/default/_variables.scss b/fork-versions/default/_variables.scss
index 16cb769..4996bb7 100644
--- a/fork-versions/default/_variables.scss
+++ b/fork-versions/default/_variables.scss
@@ -4,12 +4,6 @@
 // If you have an initialization partial (or equivalent), you should move these
 // lines to that file.
 
-// Support the same browsers as normalize.css v3.
-$support-for: (
-  ie:      9,
-  '*':     -4,
-) !default;
-
 // The font size set on the root html element.
 $base-font-size: 16px !default;
 
diff --git a/fork-versions/default/_vertical-rhythm.scss b/fork-versions/default/_vertical-rhythm.scss
index 40c95f8..4f53647 100644
--- a/fork-versions/default/_vertical-rhythm.scss
+++ b/fork-versions/default/_vertical-rhythm.scss
@@ -24,11 +24,6 @@
   @if unit($value) != 'px' {
     @error "normalize-font-size() only supports px inputs. The typey library is better.";
   }
-  // px fallback for IE 8 and earlier. Note: IE 9/10 don't understand rem
-  // in font shorthand, but font-size longhand is fine.
-  @if $base-unit == rem and support-for(ie, 8) {
-    font-size: $value;
-  }
   font-size: normalize-rhythm($value, $relative-to);
 }
 
@@ -43,19 +38,11 @@
   }
 
   $normalized-values: ();
-  $px-fallback: ();
-
   @each $value in $value-list {
-    $px-value: $value;
     @if unitless($value) and $value != 0 {
       $value: $value * normalize-rhythm($base-line-height, $relative-to);
-      $px-value: $px-value * normalize-rhythm($base-line-height, $relative-to, px);
     }
     $normalized-values: append($normalized-values, $value, $sep);
-    $px-fallback: append($px-fallback, $px-value, $sep);
-  }
-  @if $base-unit == rem and support-for(ie, 8) {
-    #{$property}: $px-fallback;
   }
   #{$property}: $normalized-values;
 }
diff --git a/fork-versions/ruby-sass-compass/README.md b/fork-versions/ruby-sass-compass/README.md
index 7a549ec..a32d741 100644
--- a/fork-versions/ruby-sass-compass/README.md
+++ b/fork-versions/ruby-sass-compass/README.md
@@ -1,17 +1,5 @@
 # Fork-able normalize-scss<br> for Ruby Sass and Compass 1.0
 
-In addition to copying these files to your Sass project, you'll also need to:
-
-1. Edit your `Gemfile` file to add:
-
- ```ruby
-gem 'support-for', '~> 1.0'
-```
-
-2. Edit your project's Compass `config.rb` file to add:
-
- ```ruby
-require 'support-for'
-```
-
-3. Update your local Gems with: `bundle install`
+1. Copy these files to your Sass project.
+2. Start forking by altering/moving Sass variables found in `_variables.scss`.
+3. Edit any CSS ruleset directly rather than overriding it in later Sass.
diff --git a/fork-versions/typey-chroma-kss/README.md b/fork-versions/typey-chroma-kss/README.md
index 96ce886..065b253 100644
--- a/fork-versions/typey-chroma-kss/README.md
+++ b/fork-versions/typey-chroma-kss/README.md
@@ -6,13 +6,12 @@
 2. This fork-able version requires:
 
   * [chroma](https://github.com/JohnAlbin/chroma)
-  * [support-for](https://github.com/JohnAlbin/support-for)
   * [typey](https://github.com/jptaranto/typey)
 
   Add them to your package.json with:
 
  ```bash
-npm install --save-dev support-for typey chroma-sass
+npm install --save-dev typey chroma-sass
 ```
 
 3. Add the dependencies' directories to your nodeSass' [`includePaths` option](https://github.com/sass/node-sass#includepaths).
@@ -25,7 +24,6 @@ sass.render({
   file: scss_filename,
   includePaths: [
     path.dirname(require.resolve('chroma-sass')),
-    path.dirname(require.resolve('support-for')),
     path.dirname(require.resolve('typey'))
   ]
 }, function(err, result) { /*...*/ });
@@ -36,7 +34,7 @@ sass.render({
 If you are not using node-sass with libSass, you probably already know how to include 3rd party libraries into your Sass project.
 
 1. Copy these files to your Sass project.
-2. This fork-able version requires the [support-for](https://github.com/JohnAlbin/support-for) Sass module and the [typey](https://github.com/jptaranto/typey) Sass module. Add support-for's `sass` directory and typey's `stylesheets` directory to your libSass include paths in the "usual way".
+2. This fork-able version requires the [chroma](https://github.com/JohnAlbin/chroma) Sass module and the [typey](https://github.com/jptaranto/typey) Sass module. Add chroma's `sass` directory and typey's `stylesheets` directory to your libSass include paths in the "usual way".
 
 ## Using with Ruby Sass
 
@@ -46,15 +44,13 @@ In addition to copying these files to your Sass project, you'll also need to:
 
  ```ruby
 gem 'chroma-sass', '~> 1.0'
-gem 'support-for', '~> 1.0'
-gem 'typey', '~> 1.0.0.beta.7'
+gem 'typey', '~> 1.0.0'
 ```
 
 2. If you use Compass, edit your `config.rb` file to add:
 
  ```ruby
 require 'chroma-sass'
-require 'support-for'
 require 'typey'
 ```
 
diff --git a/fork-versions/typey-chroma-kss/_init.scss b/fork-versions/typey-chroma-kss/_init.scss
index e5539da..5030323 100644
--- a/fork-versions/typey-chroma-kss/_init.scss
+++ b/fork-versions/typey-chroma-kss/_init.scss
@@ -27,7 +27,6 @@
 //
 // The following sass modules are shared with all .scss files:
 // - [Chroma](https://github.com/JohnAlbin/chroma)
-// - [Support-for](https://github.com/JohnAlbin/support-for)
 // - [Typey](https://github.com/jptaranto/typey)
 //
 // Additional pre-built libraries can be found on the [Sache website](http://www.sache.in/).
@@ -37,8 +36,6 @@
 // Add Chroma to manage colors.
 @import 'chroma';
 @import 'chroma/kss';
-// Add support-for to manage normalize-scss' browser support.
-@import 'support-for';
 // Add typey to manage font sizes and margins.
 @import 'typey';
 
diff --git a/fork-versions/typey-chroma-kss/base/embedded/_embedded.scss b/fork-versions/typey-chroma-kss/base/embedded/_embedded.scss
index 1770466..23359d0 100644
--- a/fork-versions/typey-chroma-kss/base/embedded/_embedded.scss
+++ b/fork-versions/typey-chroma-kss/base/embedded/_embedded.scss
@@ -15,11 +15,6 @@
 img {
   // Remove the border on images inside links in IE <11.
   border-style: none;
-  @if support-for(ie, 7) {
-    // Improve image quality when scaled in IE 7.
-    // sass-lint:disable no-vendor-prefixes
-    -ms-interpolation-mode: bicubic;
-  }
 }
 
 img,
diff --git a/fork-versions/typey-chroma-kss/base/forms/_forms.scss b/fork-versions/typey-chroma-kss/base/forms/_forms.scss
index bcd505f..c59c0ff 100644
--- a/fork-versions/typey-chroma-kss/base/forms/_forms.scss
+++ b/fork-versions/typey-chroma-kss/base/forms/_forms.scss
@@ -29,12 +29,6 @@ textarea {
   font: inherit;
   // Remove the margin in Firefox and Safari.
   margin: 0;
-  @if support-for(ie, 7) {
-    // Address `font-family` inconsistency between `textarea` and other form in IE 7
-    @include typeface(body);
-    // Improve appearance and consistency with IE 6/7.
-    *vertical-align: middle;
-  }
 }
 
 // Show the overflow in IE.
@@ -51,10 +45,6 @@ select {
 // Show the overflow in Edge.
 input {
   overflow: visible;
-  @if support-for(firefox, 29) {
-    // Firefox sets `line-height` using `!important` in the UA stylesheet.
-    line-height: normal;
-  }
 }
 
 // Correct the cursor style of increment and decrement buttons in Chrome.
@@ -177,12 +167,6 @@ input {
   box-sizing: border-box;
   // Remove the padding in IE <11.
   padding: 0;
-  @if support-for(ie, 7) {
-    // Remove excess padding in IE 7.
-    // Known issue: excess padding remains in IE 6.
-    *height: 13px;
-    *width: 13px;
-  }
 }
 
 // Fieldsets
@@ -213,10 +197,6 @@ legend {
   // people aren't caught out if they zero out fieldset padding.
   margin-left: -5px;
   padding: 0 5px;
-  @if support-for(ie, 7) {
-    // Correct alignment displayed oddly in IE 6/7.
-    *margin-left: -7px;
-  }
 }
 
 // Labels
diff --git a/fork-versions/typey-chroma-kss/base/grouping/_grouping.scss b/fork-versions/typey-chroma-kss/base/grouping/_grouping.scss
index 42546e7..820489c 100644
--- a/fork-versions/typey-chroma-kss/base/grouping/_grouping.scss
+++ b/fork-versions/typey-chroma-kss/base/grouping/_grouping.scss
@@ -66,7 +66,6 @@ dl,
 menu,
 ol,
 ul {
-  // Address margins set differently in IE 6/7.
   @include margin(1 0);
 }
 
@@ -91,7 +90,6 @@ dd {
   }
 }
 
-// Address paddings set differently in IE 6/7.
 menu,
 ol,
 ul {
@@ -102,15 +100,6 @@ ul {
   }
 }
 
-@if support-for(ie, 7) {
-  // Correct list images handled incorrectly in IE 7.
-  nav ul,
-  nav ol {
-    list-style: none;
-    list-style-image: none;
-  }
-}
-
 // Figures
 //
 // The `<figure>` element can be used to annotate illustrations, diagrams,
diff --git a/fork-versions/typey-chroma-kss/init/_variables.scss b/fork-versions/typey-chroma-kss/init/_variables.scss
index 3b725f5..da53640 100644
--- a/fork-versions/typey-chroma-kss/init/_variables.scss
+++ b/fork-versions/typey-chroma-kss/init/_variables.scss
@@ -5,25 +5,6 @@
 // Style guide: sass.variables
 
 
-// Browser support
-//
-// For older versions of browsers, some Sass relies on the `support-for()` to
-// control whether extra CSS is needed to be output. The `support-for()`
-// function and the `$support-for` variable are documented on the [support-for
-// homepage](https://github.com/JohnAlbin/support-for).
-//
-// Style guide: sass.variables.support-for
-
-// Support the same browsers as normalize.css v3.
-// Possible keys: chrome, edge, firefox, ie, opera, safari, '*'
-$support-for: (
-  // IE 9-11
-  ie:  9,
-  // The last 4 versions of all other browsers.
-  '*': -4,
-);
-
-
 // Font faces, stacks and sizes.
 //
 // Font styling and line heights are controlled by the several variables that
diff --git a/fork-versions/typey/README.md b/fork-versions/typey/README.md
index 9c368a9..526e73b 100644
--- a/fork-versions/typey/README.md
+++ b/fork-versions/typey/README.md
@@ -3,13 +3,13 @@
 ## Using with node-sass
 
 1. Copy these files to your Sass project.
-2. This fork-able version requires the [support-for](https://github.com/JohnAlbin/support-for) Sass module and the [typey](https://github.com/jptaranto/typey) Sass module. Add it to your package.json with:
+2. This fork-able version requires the [typey](https://github.com/jptaranto/typey) Sass module. Add it to your package.json with:
 
  ```bash
-npm install --save-dev support-for typey
+npm install --save-dev typey
 ```
 
-3. Add support-for's `sass` directory to your nodeSass' [`includePaths` option](https://github.com/sass/node-sass#includepaths).
+3. Add Typey's Sass directory to your nodeSass' [`includePaths` option](https://github.com/sass/node-sass#includepaths).
 
  ```js
 var sass = require('node-sass'),
@@ -18,7 +18,6 @@ var sass = require('node-sass'),
 sass.render({
   file: scss_filename,
   includePaths: [
-    path.dirname(require.resolve('support-for')),
     path.dirname(require.resolve('typey'))
   ]
 }, function(err, result) { /*...*/ });
@@ -26,10 +25,10 @@ sass.render({
 
 ## Using with libSass
 
-If you are not using node-sass with libSass, you probably already know how to include 3rd party libraries into your Sass project.
+If you are using libSass but not using node-sass, you probably already know how to include 3rd party libraries into your Sass project.
 
 1. Copy these files to your Sass project.
-2. This fork-able version requires the [support-for](https://github.com/JohnAlbin/support-for) Sass module and the [typey](https://github.com/jptaranto/typey) Sass module. Add support-for's `sass` directory and typey's `stylesheets` directory to your libSass include paths in the "usual way".
+2. This fork-able version requires the [typey](https://github.com/jptaranto/typey) Sass module. Add typey's `stylesheets` directory to your libSass include paths in the "usual way".
 
 ## Using with Ruby Sass
 
@@ -38,14 +37,12 @@ In addition to copying these files to your Sass project, you'll also need to:
 1. Edit your `Gemfile` file to add:
 
  ```ruby
-gem 'support-for', '~> 1.0'
-gem 'typey', '~> 1.0.0.beta.7'
+gem 'typey', '~> 1.0.0'
 ```
 
 2. If you use Compass, edit your `config.rb` file to add:
 
  ```ruby
-require 'support-for'
 require 'typey'
 ```
 
diff --git a/fork-versions/typey/_normalize.scss b/fork-versions/typey/_normalize.scss
index 2b8d2b5..d206427 100644
--- a/fork-versions/typey/_normalize.scss
+++ b/fork-versions/typey/_normalize.scss
@@ -1,7 +1,6 @@
 /*! normalize-scss | MIT/GPLv2 License | bit.ly/normalize-scss */
 
 @import 'variables';
-@import 'support-for';
 @import 'typey';
 
 /**
@@ -59,10 +58,6 @@ canvas,
 progress,
 video {
   display: inline-block;
-  @if support-for(ie, 7) {
-    *display: inline;
-    *zoom: 1;
-  }
 }
 
 /**
@@ -157,9 +152,6 @@ code,
 kbd,
 samp {
   font-family: monospace, monospace; /* 1 */
-  @if support-for(ie, 6) {
-    _font-family: 'courier new', monospace;
-  }
   font-size: 1em; /* 2 */
 }
 
@@ -255,10 +247,6 @@ sup {
 
 img {
   border-style: none;
-  @if support-for(ie, 7) {
-    /* Improve image quality when scaled in IE 7. */
-    -ms-interpolation-mode: bicubic;
-  }
 }
 
 /**
@@ -280,10 +268,6 @@ blockquote {
   @include margin(1 $indent-amount);
 }
 
-/**
- * Address margins set differently in IE 6/7.
- */
-
 dl,
 menu,
 ol,
@@ -307,28 +291,12 @@ dd {
   margin: 0 0 0 $indent-amount;
 }
 
-/**
- * Address paddings set differently in IE 6/7.
- */
-
 menu,
 ol,
 ul {
   padding: 0 0 0 $indent-amount;
 }
 
-@if support-for(ie, 7) {
-  /**
-   * Correct list images handled incorrectly in IE 7.
-   */
-
-  nav ul,
-  nav ol {
-    list-style: none;
-    list-style-image: none;
-  }
-}
-
 /**
  * Add the correct margin in IE 8.
  */
@@ -384,21 +352,9 @@ pre {
  *   on when it has padding (and textfield appearance).
  */
 
-@if support-for(ie, 7) {
-  /**
-   * Correct margin displayed oddly in IE 6/7.
-   */
-
-  form {
-    margin: 0;
-  }
-}
-
 /**
  * 1. Change font properties to `inherit` in all browsers (opinionated).
  * 2. Remove the margin in Firefox and Safari.
- * 3. Address `font-family` inconsistency between `textarea` and other form in IE 7
- * 4. Improve appearance and consistency with IE 6/7.
  */
 
 button,
@@ -408,10 +364,6 @@ select,
 textarea {
   font: inherit; /* 1 */
   margin: 0; /* 2 */
-  @if support-for(ie, 7) {
-    *font-family: $base-font-family; /* 3 */
-    *vertical-align: middle; /* 4 */
-  }
 }
 
 /**
@@ -474,27 +426,17 @@ button,
 
 input {
   overflow: visible;
-  @if support-for(firefox, 29) {
-    // Firefox sets `line-height` using `!important` in the UA stylesheet.
-    line-height: normal;
-  }
 }
 
 /**
  * 1. Add the correct box sizing in IE <11.
  * 2. Remove the padding in IE <11.
- * 3. Remove excess padding in IE 7.
- *    Known issue: excess padding remains in IE 6.
  */
 
 [type="checkbox"],
 [type="radio"] {
   box-sizing: border-box; /* 1 */
   padding: 0; /* 2 */
-  @if support-for(ie, 7) {
-    *height: 13px; /* 3 */
-    *width: 13px; /* 3 */
-  }
 }
 
 /**
@@ -560,7 +502,6 @@ fieldset {
  * 2. Correct the color inheritance from `fieldset` elements in IE.
  * 3. Remove the padding so developers are not caught out when they zero out
  *    `fieldset` elements in all browsers.
- * 4. Correct alignment displayed oddly in IE 6/7.
  */
 
 legend {
@@ -570,9 +511,6 @@ legend {
   white-space: normal; /* 1 */
   color: inherit; /* 2 */
   padding: 0; /* 3 */
-  @if support-for(ie, 7) {
-    *margin-left: -7px; /* 4 */
-  }
 }
 
 /**
diff --git a/fork-versions/typey/_variables.scss b/fork-versions/typey/_variables.scss
index 4c0250c..5a14afa 100644
--- a/fork-versions/typey/_variables.scss
+++ b/fork-versions/typey/_variables.scss
@@ -4,12 +4,6 @@
 // If you have an initialization partial (or equivalent), you should move these
 // lines to that file.
 
-// Support the same browsers as normalize.css v3.
-$support-for: (
-  ie:  9,  // IE 9-11
-  '*': -4, // The last 4 versions of all other browsers.
-) !default;
-
 // The font size set on the root html element.
 $base-font-size: 16px !default;
 
diff --git a/package.json b/package.json
index 05fe8e8..f585d1d 100644
--- a/package.json
+++ b/package.json
@@ -41,7 +41,6 @@
     "eyeglass": "^1.1.2",
     "mocha": "^3.1.2",
     "sassy-test": "^3.0.0",
-    "support-for": "^1.0.7",
     "typey": "^1.0.0"
   }
 }
diff --git a/sass/_normalize.scss b/sass/_normalize.scss
index ba09c5d..fd669eb 100644
--- a/sass/_normalize.scss
+++ b/sass/_normalize.scss
@@ -1,4 +1,3 @@
-@import 'support-for';
 @import 'normalize/variables';
 @import 'normalize/vertical-rhythm';
 @import 'normalize/normalize-mixin';
diff --git a/sass/_support-for.scss b/sass/_support-for.scss
deleted file mode 100644
index a96b2fe..0000000
--- a/sass/_support-for.scss
+++ /dev/null
@@ -1,64 +0,0 @@
-// Support the last 4 versions of all browsers except IE.
-$support-for: (
-  chrome:  -4,
-  edge:    25, // Current Windows Server & Xbox One version.
-  firefox: 45, // Version 45 has "extended support" until June 13, 2017.
-  ie:      9,
-  opera:   -4,
-  safari:  -4,
-  '*':     -4,
-) !default;
-
-// Set the current version number for all browsers. As of: 2016-10-17
-$support-for-current-browser-version: (
-  chrome:  54, // https://en.wikipedia.org/wiki/Google_Chrome_release_history
-  edge:    38, // https://en.wikipedia.org/wiki/Microsoft_Edge
-  firefox: 49, // https://en.wikipedia.org/wiki/Firefox_version_history#Firefox_45.4_ESR
-  ie:      11, // https://en.wikipedia.org/wiki/Internet_Explorer_versions
-  opera:   40, // https://en.wikipedia.org/wiki/Opera_(web_browser)
-  safari:  10, // https://en.wikipedia.org/wiki/Safari_version_history
-) !default;
-
-
-// support-for()
-//
-// Determines if the project has declared a minimum supported version number for
-// the specified browser.
-//
-// If configured, this is a wrapper function that uses Compass'
-// support-legacy-browser().
-// @see http://compass-style.org/reference/compass/support/#function-support-legacy-browser
-//
-@function support-for($browser, $version) {
-  // Ensure $version is an integer (or null).
-  @if not (type-of($version) == "null" or type-of($version) == "number" and round($version) == $version) {
-    @error "The $version parameter of support-for() must be an integer; #{type-of($version)} given.";
-  }
-
-  // Check against declared minimums.
-  $min-version: null;
-  @if map-has-key($support-for, $browser) {
-    $min-version: map-get($support-for, $browser);
-  }
-  @else if map-has-key($support-for, '*') {
-    $min-version: map-get($support-for, '*');
-  }
-
-  // Ensure $min-version is an integer (or null).
-  @if type-of($min-version) != "null" and type-of($min-version) != "number" {
-    @error "$support-for: (#{$browser}: #{$min-version}) must be set to an integer (or null); #{$min-version} is a #{type-of($min-version)}.";
-  }
-  @elseif type-of($min-version) == "number" and round($min-version) != $min-version {
-    @error "$support-for: (#{$browser}: #{$min-version}) must be set to an integer (or null); #{$min-version} is not an integer.";
-  }
-
-  // Negative $min-version means "X most recent versions".
-  @if type-of($min-version) == "number" and $min-version < 0 {
-    @if not map-has-key($support-for-current-browser-version, $browser) {
-      @error "#{$browser} not found in $support-for-current-browser-version map; it must be set to an integer.";
-    }
-    $min-version: map-get($support-for-current-browser-version, $browser) + $min-version + 1;
-  }
-
-  @return if(($min-version and ($version >= $min-version)), true, false);
-}
diff --git a/sass/normalize/_normalize-mixin.scss b/sass/normalize/_normalize-mixin.scss
index cc0390d..083f999 100644
--- a/sass/normalize/_normalize-mixin.scss
+++ b/sass/normalize/_normalize-mixin.scss
@@ -26,14 +26,6 @@
   @return false;
 }
 
-@mixin _normalize-monospace() {
-  font-family: monospace, monospace;
-  @if support-for(ie, 6) {
-    _font-family: 'courier new', monospace;
-  }
-  font-size: 1em;
-}
-
 @mixin normalize($include: (all), $exclude: ()) {
   // Initialize the helper function by passing it this mixin's parameters.
   $init: _normalize-include($include, $exclude);
@@ -61,9 +53,9 @@
      */
 
     html {
-      @if $normalize-vertical-rhythm or support-for(ie, 7) {
-        // Correct text resizing oddly in IE 6/7 when body `font-size` is set using
-        // `em` units.
+      @if $normalize-vertical-rhythm {
+        // Correct old browser bug that prevented accessible resizing of text
+        // when root font-size is set with px or em.
         font-size: ($base-font-size / 16px) * 100%;
       }
       @if $normalize-vertical-rhythm {
@@ -117,10 +109,6 @@
     progress,
     video {
       display: inline-block;
-      @if support-for(ie, 7) {
-        *display: inline;
-        *zoom: 1;
-      }
     }
 
     /**
@@ -217,7 +205,8 @@
     code,
     kbd,
     samp {
-      @include _normalize-monospace();
+      font-family: monospace, monospace;
+      font-size: 1em;
     }
 
     /**
@@ -243,7 +232,7 @@
       @include normalize-margin(1 0, $h1-font-size);
     }
 
-    @if $normalize-vertical-rhythm or support-for(ie, 7) {
+    @if $normalize-vertical-rhythm {
       h2 {
         @include normalize-font-size($h2-font-size);
         @if $normalize-vertical-rhythm {
@@ -334,10 +323,6 @@
 
     img {
       border-style: none;
-      @if support-for(ie, 7) {
-        /* Improve image quality when scaled in IE 7. */
-        -ms-interpolation-mode: bicubic;
-      }
     }
 
     /**
@@ -353,7 +338,7 @@
     /* Grouping content
        ========================================================================== */
 
-    @if $normalize-vertical-rhythm or support-for(ie, 7) {
+    @if $normalize-vertical-rhythm {
       /**
        * Set 1 unit of vertical rhythm on the top and bottom margin.
        */
@@ -362,10 +347,6 @@
         @include normalize-margin(1 $indent-amount);
       }
 
-      /**
-       * Address margins set differently in IE 6/7.
-       */
-
       dl,
       menu,
       ol,
@@ -391,10 +372,6 @@
         margin: 0 0 0 $indent-amount;
       }
 
-      /**
-       * Address paddings set differently in IE 6/7.
-       */
-
       menu,
       ol,
       ul {
@@ -402,18 +379,6 @@
       }
     }
 
-    @if support-for(ie, 7) {
-      /**
-       * Correct list images handled incorrectly in IE 7.
-       */
-
-      nav ul,
-      nav ol {
-        list-style: none;
-        list-style-image: none;
-      }
-    }
-
     /**
      * Add the correct margin in IE 8.
      */
@@ -433,7 +398,7 @@
       overflow: visible; /* 2 */
     }
 
-    @if $normalize-vertical-rhythm or support-for(ie, 7) {
+    @if $normalize-vertical-rhythm {
       /**
        * Set 1 unit of vertical rhythm on the top and bottom margin.
        */
@@ -445,7 +410,8 @@
     }
 
     pre {
-      @include _normalize-monospace();
+      font-family: monospace, monospace;
+      font-size: 1em;
     }
   }
 
@@ -473,21 +439,9 @@
      *   on when it has padding (and textfield appearance).
      */
 
-    @if support-for(ie, 7) {
-      /**
-       * Correct margin displayed oddly in IE 6/7.
-       */
-
-      form {
-        margin: 0;
-      }
-    }
-
     /**
      * 1. Change font properties to `inherit` in all browsers (opinionated).
      * 2. Remove the margin in Firefox and Safari.
-     * 3. Address `font-family` inconsistency between `textarea` and other form in IE 7
-     * 4. Improve appearance and consistency with IE 6/7.
      */
 
     button,
@@ -497,10 +451,6 @@
     textarea {
       font: inherit; /* 1 */
       margin: 0; /* 2 */
-      @if support-for(ie, 7) {
-        *font-family: $base-font-family; /* 3 */
-        *vertical-align: middle; /* 4 */
-      }
     }
 
     /**
@@ -563,27 +513,17 @@
 
     input {
       overflow: visible;
-      @if support-for(firefox, 29) {
-        // Firefox sets `line-height` using `!important` in the UA stylesheet.
-        line-height: normal;
-      }
     }
 
     /**
      * 1. Add the correct box sizing in IE <11.
      * 2. Remove the padding in IE <11.
-     * 3. Remove excess padding in IE 7.
-     *    Known issue: excess padding remains in IE 6.
      */
 
     [type="checkbox"],
     [type="radio"] {
       box-sizing: border-box; /* 1 */
       padding: 0; /* 2 */
-      @if support-for(ie, 7) {
-        *height: 13px; /* 3 */
-        *width: 13px; /* 3 */
-      }
     }
 
     /**
@@ -648,7 +588,6 @@
      * 2. Correct the color inheritance from `fieldset` elements in IE.
      * 3. Remove the padding so developers are not caught out when they zero out
      *    `fieldset` elements in all browsers.
-     * 4. Correct alignment displayed oddly in IE 6/7.
      */
 
     legend {
@@ -658,9 +597,6 @@
       white-space: normal; /* 1 */
       color: inherit; /* 2 */
       padding: 0; /* 3 */
-      @if support-for(ie, 7) {
-        *margin-left: -7px; /* 4 */
-      }
     }
 
     /**
diff --git a/sass/normalize/_vertical-rhythm.scss b/sass/normalize/_vertical-rhythm.scss
index 40c95f8..4f53647 100644
--- a/sass/normalize/_vertical-rhythm.scss
+++ b/sass/normalize/_vertical-rhythm.scss
@@ -24,11 +24,6 @@
   @if unit($value) != 'px' {
     @error "normalize-font-size() only supports px inputs. The typey library is better.";
   }
-  // px fallback for IE 8 and earlier. Note: IE 9/10 don't understand rem
-  // in font shorthand, but font-size longhand is fine.
-  @if $base-unit == rem and support-for(ie, 8) {
-    font-size: $value;
-  }
   font-size: normalize-rhythm($value, $relative-to);
 }
 
@@ -43,19 +38,11 @@
   }
 
   $normalized-values: ();
-  $px-fallback: ();
-
   @each $value in $value-list {
-    $px-value: $value;
     @if unitless($value) and $value != 0 {
       $value: $value * normalize-rhythm($base-line-height, $relative-to);
-      $px-value: $px-value * normalize-rhythm($base-line-height, $relative-to, px);
     }
     $normalized-values: append($normalized-values, $value, $sep);
-    $px-fallback: append($px-fallback, $px-value, $sep);
-  }
-  @if $base-unit == rem and support-for(ie, 8) {
-    #{$property}: $px-fallback;
   }
   #{$property}: $normalized-values;
 }
diff --git a/test/fixtures/fork-versions/default/output.css b/test/fixtures/fork-versions/default/output.css
index d2a4231..5373667 100644
--- a/test/fixtures/fork-versions/default/output.css
+++ b/test/fixtures/fork-versions/default/output.css
@@ -232,8 +232,6 @@ hr {
 /**
  * 1. Change font properties to `inherit` in all browsers (opinionated).
  * 2. Remove the margin in Firefox and Safari.
- * 3. Address `font-family` inconsistency between `textarea` and other form in IE 7
- * 4. Improve appearance and consistency with IE 6/7.
  */
 button,
 input,
@@ -303,8 +301,6 @@ input {
 /**
  * 1. Add the correct box sizing in IE <11.
  * 2. Remove the padding in IE <11.
- * 3. Remove excess padding in IE 7.
- *    Known issue: excess padding remains in IE 6.
  */
 [type="checkbox"],
 [type="radio"] {
@@ -365,7 +361,6 @@ fieldset {
  * 2. Correct the color inheritance from `fieldset` elements in IE.
  * 3. Remove the padding so developers are not caught out when they zero out
  *    `fieldset` elements in all browsers.
- * 4. Correct alignment displayed oddly in IE 6/7.
  */
 legend {
   box-sizing: border-box;
diff --git a/test/fixtures/fork-versions/typey/output.css b/test/fixtures/fork-versions/typey/output.css
index 2d034d6..35c8cdc 100644
--- a/test/fixtures/fork-versions/typey/output.css
+++ b/test/fixtures/fork-versions/typey/output.css
@@ -227,9 +227,6 @@ svg:not(:root) {
 blockquote {
   margin: 1.5rem 2.5rem; }
 
-/**
- * Address margins set differently in IE 6/7.
- */
 dl,
 menu,
 ol,
@@ -248,9 +245,6 @@ ul ul {
 dd {
   margin: 0 0 0 40px; }
 
-/**
- * Address paddings set differently in IE 6/7.
- */
 menu,
 ol,
 ul {
@@ -305,8 +299,6 @@ pre {
 /**
  * 1. Change font properties to `inherit` in all browsers (opinionated).
  * 2. Remove the margin in Firefox and Safari.
- * 3. Address `font-family` inconsistency between `textarea` and other form in IE 7
- * 4. Improve appearance and consistency with IE 6/7.
  */
 button,
 input,
@@ -376,8 +368,6 @@ input {
 /**
  * 1. Add the correct box sizing in IE <11.
  * 2. Remove the padding in IE <11.
- * 3. Remove excess padding in IE 7.
- *    Known issue: excess padding remains in IE 6.
  */
 [type="checkbox"],
 [type="radio"] {
@@ -438,7 +428,6 @@ fieldset {
  * 2. Correct the color inheritance from `fieldset` elements in IE.
  * 3. Remove the padding so developers are not caught out when they zero out
  *    `fieldset` elements in all browsers.
- * 4. Correct alignment displayed oddly in IE 6/7.
  */
 legend {
   box-sizing: border-box;
diff --git a/test/fixtures/import-now/output.css b/test/fixtures/import-now/output.css
index 0f75d8a..0be7e3b 100644
--- a/test/fixtures/import-now/output.css
+++ b/test/fixtures/import-now/output.css
@@ -233,8 +233,6 @@ pre {
 /**
      * 1. Change font properties to `inherit` in all browsers (opinionated).
      * 2. Remove the margin in Firefox and Safari.
-     * 3. Address `font-family` inconsistency between `textarea` and other form in IE 7
-     * 4. Improve appearance and consistency with IE 6/7.
      */
 button,
 input,
@@ -304,8 +302,6 @@ input {
 /**
      * 1. Add the correct box sizing in IE <11.
      * 2. Remove the padding in IE <11.
-     * 3. Remove excess padding in IE 7.
-     *    Known issue: excess padding remains in IE 6.
      */
 [type="checkbox"],
 [type="radio"] {
@@ -366,7 +362,6 @@ fieldset {
      * 2. Correct the color inheritance from `fieldset` elements in IE.
      * 3. Remove the padding so developers are not caught out when they zero out
      *    `fieldset` elements in all browsers.
-     * 4. Correct alignment displayed oddly in IE 6/7.
      */
 legend {
   box-sizing: border-box;
diff --git a/test/fixtures/normalize/exclude-multiple/output.css b/test/fixtures/normalize/exclude-multiple/output.css
index e4404c5..912e923 100644
--- a/test/fixtures/normalize/exclude-multiple/output.css
+++ b/test/fixtures/normalize/exclude-multiple/output.css
@@ -195,8 +195,6 @@ sup {
 /**
      * 1. Change font properties to `inherit` in all browsers (opinionated).
      * 2. Remove the margin in Firefox and Safari.
-     * 3. Address `font-family` inconsistency between `textarea` and other form in IE 7
-     * 4. Improve appearance and consistency with IE 6/7.
      */
 button,
 input,
@@ -266,8 +264,6 @@ input {
 /**
      * 1. Add the correct box sizing in IE <11.
      * 2. Remove the padding in IE <11.
-     * 3. Remove excess padding in IE 7.
-     *    Known issue: excess padding remains in IE 6.
      */
 [type="checkbox"],
 [type="radio"] {
@@ -328,7 +324,6 @@ fieldset {
      * 2. Correct the color inheritance from `fieldset` elements in IE.
      * 3. Remove the padding so developers are not caught out when they zero out
      *    `fieldset` elements in all browsers.
-     * 4. Correct alignment displayed oddly in IE 6/7.
      */
 legend {
   box-sizing: border-box;
diff --git a/test/fixtures/normalize/exclude-string/output.css b/test/fixtures/normalize/exclude-string/output.css
index 0f75d8a..0be7e3b 100644
--- a/test/fixtures/normalize/exclude-string/output.css
+++ b/test/fixtures/normalize/exclude-string/output.css
@@ -233,8 +233,6 @@ pre {
 /**
      * 1. Change font properties to `inherit` in all browsers (opinionated).
      * 2. Remove the margin in Firefox and Safari.
-     * 3. Address `font-family` inconsistency between `textarea` and other form in IE 7
-     * 4. Improve appearance and consistency with IE 6/7.
      */
 button,
 input,
@@ -304,8 +302,6 @@ input {
 /**
      * 1. Add the correct box sizing in IE <11.
      * 2. Remove the padding in IE <11.
-     * 3. Remove excess padding in IE 7.
-     *    Known issue: excess padding remains in IE 6.
      */
 [type="checkbox"],
 [type="radio"] {
@@ -366,7 +362,6 @@ fieldset {
      * 2. Correct the color inheritance from `fieldset` elements in IE.
      * 3. Remove the padding so developers are not caught out when they zero out
      *    `fieldset` elements in all browsers.
-     * 4. Correct alignment displayed oddly in IE 6/7.
      */
 legend {
   box-sizing: border-box;
diff --git a/test/fixtures/variables/default/output.css b/test/fixtures/variables/default/output.css
index 0f75d8a..0be7e3b 100644
--- a/test/fixtures/variables/default/output.css
+++ b/test/fixtures/variables/default/output.css
@@ -233,8 +233,6 @@ pre {
 /**
      * 1. Change font properties to `inherit` in all browsers (opinionated).
      * 2. Remove the margin in Firefox and Safari.
-     * 3. Address `font-family` inconsistency between `textarea` and other form in IE 7
-     * 4. Improve appearance and consistency with IE 6/7.
      */
 button,
 input,
@@ -304,8 +302,6 @@ input {
 /**
      * 1. Add the correct box sizing in IE <11.
      * 2. Remove the padding in IE <11.
-     * 3. Remove excess padding in IE 7.
-     *    Known issue: excess padding remains in IE 6.
      */
 [type="checkbox"],
 [type="radio"] {
@@ -366,7 +362,6 @@ fieldset {
      * 2. Correct the color inheritance from `fieldset` elements in IE.
      * 3. Remove the padding so developers are not caught out when they zero out
      *    `fieldset` elements in all browsers.
-     * 4. Correct alignment displayed oddly in IE 6/7.
      */
 legend {
   box-sizing: border-box;
diff --git a/test/fixtures/variables/font/input.scss b/test/fixtures/variables/font/input.scss
index ab25350..5ab32d1 100644
--- a/test/fixtures/variables/font/input.scss
+++ b/test/fixtures/variables/font/input.scss
@@ -13,9 +13,5 @@ $h4-font-size: 0.9  * $base-font-size;
 $h5-font-size: 0.75 * $base-font-size;
 $h6-font-size: 0.5  * $base-font-size;
 
-$support-for: (
-  ie: 8,
-);
-
 @import 'normalize';
 @include normalize();
diff --git a/test/fixtures/variables/font/output.css b/test/fixtures/variables/font/output.css
index b02ef72..05b4c28 100644
--- a/test/fixtures/variables/font/output.css
+++ b/test/fixtures/variables/font/output.css
@@ -139,52 +139,34 @@ dfn {
      * `article` contexts in Chrome, Firefox, and Safari.
      */
 h1 {
-  font-size: 72px;
   font-size: 3rem;
-  line-height: 108px;
   line-height: 4.5rem;
   /* Set 1 unit of vertical rhythm on the top and bottom margins. */
-  margin: 36px 0;
   margin: 1.5rem 0; }
 
 h2 {
-  font-size: 48px;
   font-size: 2rem;
-  line-height: 72px;
   line-height: 3rem;
-  margin: 36px 0;
   margin: 1.5rem 0; }
 
 h3 {
-  font-size: 36px;
   font-size: 1.5rem;
-  line-height: 72px;
   line-height: 3rem;
-  margin: 36px 0;
   margin: 1.5rem 0; }
 
 h4 {
-  font-size: 21.6px;
   font-size: 0.9rem;
-  line-height: 36px;
   line-height: 1.5rem;
-  margin: 36px 0;
   margin: 1.5rem 0; }
 
 h5 {
-  font-size: 18px;
   font-size: 0.75rem;
-  line-height: 36px;
   line-height: 1.5rem;
-  margin: 36px 0;
   margin: 1.5rem 0; }
 
 h6 {
-  font-size: 12px;
   font-size: 0.5rem;
-  line-height: 36px;
   line-height: 1.5rem;
-  margin: 36px 0;
   margin: 1.5rem 0; }
 
 /**
@@ -237,17 +219,12 @@ svg:not(:root) {
        * Set 1 unit of vertical rhythm on the top and bottom margin.
        */
 blockquote {
-  margin: 36px 40px;
   margin: 1.5rem 40px; }
 
-/**
-       * Address margins set differently in IE 6/7.
-       */
 dl,
 menu,
 ol,
 ul {
-  margin: 36px 0;
   margin: 1.5rem 0; }
 
 /**
@@ -262,9 +239,6 @@ ul ul {
 dd {
   margin: 0 0 0 40px; }
 
-/**
-       * Address paddings set differently in IE 6/7.
-       */
 menu,
 ol,
 ul {
@@ -274,7 +248,6 @@ ul {
      * Add the correct margin in IE 8.
      */
 figure {
-  margin: 36px 40px;
   margin: 1.5rem 40px; }
 
 /**
@@ -294,7 +267,6 @@ hr {
        */
 p,
 pre {
-  margin: 36px 0;
   margin: 1.5rem 0; }
 
 pre {
@@ -325,8 +297,6 @@ pre {
 /**
      * 1. Change font properties to `inherit` in all browsers (opinionated).
      * 2. Remove the margin in Firefox and Safari.
-     * 3. Address `font-family` inconsistency between `textarea` and other form in IE 7
-     * 4. Improve appearance and consistency with IE 6/7.
      */
 button,
 input,
@@ -396,8 +366,6 @@ input {
 /**
      * 1. Add the correct box sizing in IE <11.
      * 2. Remove the padding in IE <11.
-     * 3. Remove excess padding in IE 7.
-     *    Known issue: excess padding remains in IE 6.
      */
 [type="checkbox"],
 [type="radio"] {
@@ -458,7 +426,6 @@ fieldset {
      * 2. Correct the color inheritance from `fieldset` elements in IE.
      * 3. Remove the padding so developers are not caught out when they zero out
      *    `fieldset` elements in all browsers.
-     * 4. Correct alignment displayed oddly in IE 6/7.
      */
 legend {
   box-sizing: border-box;
diff --git a/test/fixtures/variables/indent-amount/output.css b/test/fixtures/variables/indent-amount/output.css
index b12ea4b..ef0fec4 100644
--- a/test/fixtures/variables/indent-amount/output.css
+++ b/test/fixtures/variables/indent-amount/output.css
@@ -221,9 +221,6 @@ svg:not(:root) {
 blockquote {
   margin: 1.5em 3em; }
 
-/**
-       * Address margins set differently in IE 6/7.
-       */
 dl,
 menu,
 ol,
@@ -242,9 +239,6 @@ ul ul {
 dd {
   margin: 0 0 0 3em; }
 
-/**
-       * Address paddings set differently in IE 6/7.
-       */
 menu,
 ol,
 ul {
@@ -303,8 +297,6 @@ pre {
 /**
      * 1. Change font properties to `inherit` in all browsers (opinionated).
      * 2. Remove the margin in Firefox and Safari.
-     * 3. Address `font-family` inconsistency between `textarea` and other form in IE 7
-     * 4. Improve appearance and consistency with IE 6/7.
      */
 button,
 input,
@@ -374,8 +366,6 @@ input {
 /**
      * 1. Add the correct box sizing in IE <11.
      * 2. Remove the padding in IE <11.
-     * 3. Remove excess padding in IE 7.
-     *    Known issue: excess padding remains in IE 6.
      */
 [type="checkbox"],
 [type="radio"] {
@@ -436,7 +426,6 @@ fieldset {
      * 2. Correct the color inheritance from `fieldset` elements in IE.
      * 3. Remove the padding so developers are not caught out when they zero out
      *    `fieldset` elements in all browsers.
-     * 4. Correct alignment displayed oddly in IE 6/7.
      */
 legend {
   box-sizing: border-box;
diff --git a/test/fixtures/variables/support-for/firefox29/input.scss b/test/fixtures/variables/support-for/firefox29/input.scss
deleted file mode 100644
index 3e5b271..0000000
--- a/test/fixtures/variables/support-for/firefox29/input.scss
+++ /dev/null
@@ -1,6 +0,0 @@
-$support-for: (
-  firefox: 29,
-);
-
-@import 'normalize';
-@include normalize();
diff --git a/test/fixtures/variables/support-for/firefox29/output.css b/test/fixtures/variables/support-for/firefox29/output.css
deleted file mode 100644
index b2f5d0a..0000000
--- a/test/fixtures/variables/support-for/firefox29/output.css
+++ /dev/null
@@ -1,396 +0,0 @@
-/*! normalize-scss | MIT/GPLv2 License | bit.ly/normalize-scss */
-/**
-     * 1. Change the default font family in all browsers (opinionated).
-     * 2. Prevent adjustments of font size after orientation changes in IE and iOS.
-     */
-html {
-  font-family: sans-serif;
-  /* 1 */
-  -ms-text-size-adjust: 100%;
-  /* 2 */
-  -webkit-text-size-adjust: 100%;
-  /* 2 */ }
-
-/**
-     * Remove the margin in all browsers (opinionated).
-     */
-body {
-  margin: 0; }
-
-/* HTML5 display definitions
-       ========================================================================== */
-/**
-     * Add the correct display in IE <10.
-     * Add the correct display in Edge, IE, and Firefox for `details` or `summary`.
-     * Add the correct display in IE for `main`.
-     */
-article,
-aside,
-details,
-figcaption,
-figure,
-footer,
-header,
-main,
-menu,
-nav,
-section,
-summary {
-  display: block; }
-
-/**
-     * Add the correct display in IE <10.
-     */
-audio,
-canvas,
-progress,
-video {
-  display: inline-block; }
-
-/**
-     * Add the correct display and remove excess height in iOS 4-7.
-     */
-audio:not([controls]) {
-  display: none;
-  height: 0; }
-
-/**
-     * Add the correct vertical alignment in Chrome, Firefox, and Opera.
-     */
-progress {
-  vertical-align: baseline; }
-
-/**
-     * Add the correct display in IE <11, Safari <8, and Firefox <22.
-     * 1. Add the correct display in IE.
-     */
-template,
-[hidden] {
-  display: none; }
-
-/* Links
-       ========================================================================== */
-/**
-     * 1. Remove the gray background on active links in IE 10.
-     * 2. Remove gaps in links underline in iOS 8+ and Safari 8+.
-     */
-a {
-  background-color: transparent;
-  /* 1 */
-  -webkit-text-decoration-skip: objects;
-  /* 2 */ }
-
-/**
-     * Remove the outline on focused links when they are also active or hovered
-     * in all browsers (opinionated).
-     */
-a:active,
-a:hover {
-  outline-width: 0; }
-
-/* Text-level semantics
-       ========================================================================== */
-/**
-     * 1. Remove the bottom border in Firefox <40.
-     * 2. Add the correct text decoration in Chrome, Edge, IE, Opera, and Safari.
-     */
-abbr[title] {
-  border-bottom: none;
-  /* 1 */
-  text-decoration: underline;
-  /* 2 */
-  text-decoration: underline dotted;
-  /* 2 */ }
-
-/**
-     * Prevent the duplicate application of `bolder` by the next rule in Safari 6.
-     */
-b,
-strong {
-  font-weight: inherit; }
-
-/**
-     * Add the correct font weight in Chrome, Edge, and Safari.
-     */
-b,
-strong {
-  font-weight: bolder; }
-
-/**
-     * 1. Correct the inheritance and scaling of font size in all browsers.
-     * 2. Correct the odd `em` font sizing in all browsers.
-     */
-code,
-kbd,
-samp {
-  font-family: monospace, monospace;
-  font-size: 1em; }
-
-/**
-     * Add the correct font style in Android <4.4.
-     */
-dfn {
-  font-style: italic; }
-
-/**
-     * Correct the font size and margin on `h1` elements within `section` and
-     * `article` contexts in Chrome, Firefox, and Safari.
-     */
-h1 {
-  font-size: 2em;
-  /* Set 1 unit of vertical rhythm on the top and bottom margins. */
-  margin: 0.75em 0; }
-
-/**
-     * Add the correct background and color in IE <10.
-     */
-mark {
-  background-color: #ff0;
-  color: #000; }
-
-/**
-     * Add the correct font size in all browsers.
-     */
-small {
-  font-size: 80%; }
-
-/**
-     * Prevent `sub` and `sup` elements from affecting the line height in
-     * all browsers.
-     */
-sub,
-sup {
-  font-size: 75%;
-  line-height: 0;
-  position: relative;
-  vertical-align: baseline; }
-
-sub {
-  bottom: -0.25em; }
-
-sup {
-  top: -0.5em; }
-
-/* Embedded content
-       ========================================================================== */
-/**
-     * Remove the border on images inside links in IE <11.
-     */
-img {
-  border-style: none; }
-
-/**
-     * Hide the overflow in IE.
-     */
-svg:not(:root) {
-  overflow: hidden; }
-
-/* Grouping content
-       ========================================================================== */
-/**
-     * Add the correct margin in IE 8.
-     */
-figure {
-  margin: 1.5em 40px; }
-
-/**
-     * 1. Add the correct box sizing in Firefox.
-     * 2. Show the overflow in Edge and IE.
-     */
-hr {
-  box-sizing: content-box;
-  /* 1 */
-  height: 0;
-  /* 1 */
-  overflow: visible;
-  /* 2 */ }
-
-pre {
-  font-family: monospace, monospace;
-  font-size: 1em; }
-
-/* Forms
-       ========================================================================== */
-/**
-     * Known issues:
-     * - By default, Chrome on OS X and Safari on OS X allow very limited styling of
-     *   select, unless a border property is set. The default font weight on
-     *   optgroup elements cannot safely be changed in Chrome on OSX and Safari on
-     *   OS X.
-     * - It is recommended that you do not style checkbox and radio inputs as
-     *   Firefox's implementation does not respect box-sizing, padding, or width.
-     * - Certain font size values applied to number inputs cause the cursor style of
-     *   the decrement button to change from default to text.
-     * - The search input is not fully stylable by default. In Chrome and Safari on
-     *   OSX/iOS you can't control font, padding, border, or background. In Chrome
-     *   and Safari on Windows you can't control border properly. It will apply
-     *   border-width but will only show a border color (which cannot be controlled)
-     *   for the outer 1px of that border. Applying -webkit-appearance: textfield
-     *   addresses these issues without removing the benefits of search inputs (e.g.
-     *   showing past searches). Safari (but not Chrome) will clip the cancel button
-     *   on when it has padding (and textfield appearance).
-     */
-/**
-     * 1. Change font properties to `inherit` in all browsers (opinionated).
-     * 2. Remove the margin in Firefox and Safari.
-     * 3. Address `font-family` inconsistency between `textarea` and other form in IE 7
-     * 4. Improve appearance and consistency with IE 6/7.
-     */
-button,
-input,
-optgroup,
-select,
-textarea {
-  font: inherit;
-  /* 1 */
-  margin: 0;
-  /* 2 */ }
-
-/**
-     * Show the overflow in IE.
-     */
-button {
-  overflow: visible; }
-
-/**
-     * Remove the inheritance of text transform in Edge, Firefox, and IE.
-     * 1. Remove the inheritance of text transform in Firefox.
-     */
-button,
-select {
-  /* 1 */
-  text-transform: none; }
-
-/**
-     * 1. Prevent a WebKit bug where (2) destroys native `audio` and `video`
-     *    controls in Android 4.
-     * 2. Correct the inability to style clickable types in iOS and Safari.
-     */
-button,
-html [type="button"],
-[type="reset"],
-[type="submit"] {
-  -webkit-appearance: button;
-  /* 2 */ }
-
-button,
-[type="button"],
-[type="reset"],
-[type="submit"] {
-  /**
-       * Remove the inner border and padding in Firefox.
-       */
-  /**
-       * Restore the focus styles unset by the previous rule.
-       */ }
-  button::-moz-focus-inner,
-  [type="button"]::-moz-focus-inner,
-  [type="reset"]::-moz-focus-inner,
-  [type="submit"]::-moz-focus-inner {
-    border-style: none;
-    padding: 0; }
-  button:-moz-focusring,
-  [type="button"]:-moz-focusring,
-  [type="reset"]:-moz-focusring,
-  [type="submit"]:-moz-focusring {
-    outline: 1px dotted ButtonText; }
-
-/**
-     * Show the overflow in Edge.
-     */
-input {
-  overflow: visible;
-  line-height: normal; }
-
-/**
-     * 1. Add the correct box sizing in IE <11.
-     * 2. Remove the padding in IE <11.
-     * 3. Remove excess padding in IE 7.
-     *    Known issue: excess padding remains in IE 6.
-     */
-[type="checkbox"],
-[type="radio"] {
-  box-sizing: border-box;
-  /* 1 */
-  padding: 0;
-  /* 2 */ }
-
-/**
-     * Correct the cursor style of increment and decrement buttons in Chrome.
-     */
-[type="number"]::-webkit-inner-spin-button,
-[type="number"]::-webkit-outer-spin-button {
-  height: auto; }
-
-/**
-     * 1. Correct the odd appearance in Chrome and Safari.
-     * 2. Correct the outline style in Safari.
-     */
-[type="search"] {
-  -webkit-appearance: textfield;
-  /* 1 */
-  outline-offset: -2px;
-  /* 2 */
-  /**
-       * Remove the inner padding and cancel buttons in Chrome and Safari on OS X.
-       */ }
-  [type="search"]::-webkit-search-cancel-button, [type="search"]::-webkit-search-decoration {
-    -webkit-appearance: none; }
-
-/**
-     * Correct the text style of placeholders in Chrome, Edge, and Safari.
-     */
-::-webkit-input-placeholder {
-  color: inherit;
-  opacity: 0.54; }
-
-/**
-     * 1. Correct the inability to style clickable types in iOS and Safari.
-     * 2. Change font properties to `inherit` in Safari.
-     */
-::-webkit-file-upload-button {
-  -webkit-appearance: button;
-  /* 1 */
-  font: inherit;
-  /* 2 */ }
-
-/**
-     * Change the border, margin, and padding in all browsers (opinionated).
-     */
-fieldset {
-  border: 1px solid #c0c0c0;
-  margin: 0 2px;
-  padding: 0.35em 0.625em 0.75em; }
-
-/**
-     * 1. Correct the text wrapping in Edge and IE.
-     * 2. Correct the color inheritance from `fieldset` elements in IE.
-     * 3. Remove the padding so developers are not caught out when they zero out
-     *    `fieldset` elements in all browsers.
-     * 4. Correct alignment displayed oddly in IE 6/7.
-     */
-legend {
-  box-sizing: border-box;
-  /* 1 */
-  display: table;
-  /* 1 */
-  max-width: 100%;
-  /* 1 */
-  white-space: normal;
-  /* 1 */
-  color: inherit;
-  /* 2 */
-  padding: 0;
-  /* 3 */ }
-
-/**
-     * Restore the font weight unset by a previous rule.
-     */
-optgroup {
-  font-weight: bold; }
-
-/**
-     * Remove the default vertical scrollbar in IE.
-     */
-textarea {
-  overflow: auto; }
diff --git a/test/fixtures/variables/support-for/ie10/input.scss b/test/fixtures/variables/support-for/ie10/input.scss
deleted file mode 100644
index a7127e7..0000000
--- a/test/fixtures/variables/support-for/ie10/input.scss
+++ /dev/null
@@ -1,6 +0,0 @@
-$support-for: (
-  ie: 10,
-);
-
-@import 'normalize';
-@include normalize();
diff --git a/test/fixtures/variables/support-for/ie10/output.css b/test/fixtures/variables/support-for/ie10/output.css
deleted file mode 100644
index 0f75d8a..0000000
--- a/test/fixtures/variables/support-for/ie10/output.css
+++ /dev/null
@@ -1,395 +0,0 @@
-/*! normalize-scss | MIT/GPLv2 License | bit.ly/normalize-scss */
-/**
-     * 1. Change the default font family in all browsers (opinionated).
-     * 2. Prevent adjustments of font size after orientation changes in IE and iOS.
-     */
-html {
-  font-family: sans-serif;
-  /* 1 */
-  -ms-text-size-adjust: 100%;
-  /* 2 */
-  -webkit-text-size-adjust: 100%;
-  /* 2 */ }
-
-/**
-     * Remove the margin in all browsers (opinionated).
-     */
-body {
-  margin: 0; }
-
-/* HTML5 display definitions
-       ========================================================================== */
-/**
-     * Add the correct display in IE <10.
-     * Add the correct display in Edge, IE, and Firefox for `details` or `summary`.
-     * Add the correct display in IE for `main`.
-     */
-article,
-aside,
-details,
-figcaption,
-figure,
-footer,
-header,
-main,
-menu,
-nav,
-section,
-summary {
-  display: block; }
-
-/**
-     * Add the correct display in IE <10.
-     */
-audio,
-canvas,
-progress,
-video {
-  display: inline-block; }
-
-/**
-     * Add the correct display and remove excess height in iOS 4-7.
-     */
-audio:not([controls]) {
-  display: none;
-  height: 0; }
-
-/**
-     * Add the correct vertical alignment in Chrome, Firefox, and Opera.
-     */
-progress {
-  vertical-align: baseline; }
-
-/**
-     * Add the correct display in IE <11, Safari <8, and Firefox <22.
-     * 1. Add the correct display in IE.
-     */
-template,
-[hidden] {
-  display: none; }
-
-/* Links
-       ========================================================================== */
-/**
-     * 1. Remove the gray background on active links in IE 10.
-     * 2. Remove gaps in links underline in iOS 8+ and Safari 8+.
-     */
-a {
-  background-color: transparent;
-  /* 1 */
-  -webkit-text-decoration-skip: objects;
-  /* 2 */ }
-
-/**
-     * Remove the outline on focused links when they are also active or hovered
-     * in all browsers (opinionated).
-     */
-a:active,
-a:hover {
-  outline-width: 0; }
-
-/* Text-level semantics
-       ========================================================================== */
-/**
-     * 1. Remove the bottom border in Firefox <40.
-     * 2. Add the correct text decoration in Chrome, Edge, IE, Opera, and Safari.
-     */
-abbr[title] {
-  border-bottom: none;
-  /* 1 */
-  text-decoration: underline;
-  /* 2 */
-  text-decoration: underline dotted;
-  /* 2 */ }
-
-/**
-     * Prevent the duplicate application of `bolder` by the next rule in Safari 6.
-     */
-b,
-strong {
-  font-weight: inherit; }
-
-/**
-     * Add the correct font weight in Chrome, Edge, and Safari.
-     */
-b,
-strong {
-  font-weight: bolder; }
-
-/**
-     * 1. Correct the inheritance and scaling of font size in all browsers.
-     * 2. Correct the odd `em` font sizing in all browsers.
-     */
-code,
-kbd,
-samp {
-  font-family: monospace, monospace;
-  font-size: 1em; }
-
-/**
-     * Add the correct font style in Android <4.4.
-     */
-dfn {
-  font-style: italic; }
-
-/**
-     * Correct the font size and margin on `h1` elements within `section` and
-     * `article` contexts in Chrome, Firefox, and Safari.
-     */
-h1 {
-  font-size: 2em;
-  /* Set 1 unit of vertical rhythm on the top and bottom margins. */
-  margin: 0.75em 0; }
-
-/**
-     * Add the correct background and color in IE <10.
-     */
-mark {
-  background-color: #ff0;
-  color: #000; }
-
-/**
-     * Add the correct font size in all browsers.
-     */
-small {
-  font-size: 80%; }
-
-/**
-     * Prevent `sub` and `sup` elements from affecting the line height in
-     * all browsers.
-     */
-sub,
-sup {
-  font-size: 75%;
-  line-height: 0;
-  position: relative;
-  vertical-align: baseline; }
-
-sub {
-  bottom: -0.25em; }
-
-sup {
-  top: -0.5em; }
-
-/* Embedded content
-       ========================================================================== */
-/**
-     * Remove the border on images inside links in IE <11.
-     */
-img {
-  border-style: none; }
-
-/**
-     * Hide the overflow in IE.
-     */
-svg:not(:root) {
-  overflow: hidden; }
-
-/* Grouping content
-       ========================================================================== */
-/**
-     * Add the correct margin in IE 8.
-     */
-figure {
-  margin: 1.5em 40px; }
-
-/**
-     * 1. Add the correct box sizing in Firefox.
-     * 2. Show the overflow in Edge and IE.
-     */
-hr {
-  box-sizing: content-box;
-  /* 1 */
-  height: 0;
-  /* 1 */
-  overflow: visible;
-  /* 2 */ }
-
-pre {
-  font-family: monospace, monospace;
-  font-size: 1em; }
-
-/* Forms
-       ========================================================================== */
-/**
-     * Known issues:
-     * - By default, Chrome on OS X and Safari on OS X allow very limited styling of
-     *   select, unless a border property is set. The default font weight on
-     *   optgroup elements cannot safely be changed in Chrome on OSX and Safari on
-     *   OS X.
-     * - It is recommended that you do not style checkbox and radio inputs as
-     *   Firefox's implementation does not respect box-sizing, padding, or width.
-     * - Certain font size values applied to number inputs cause the cursor style of
-     *   the decrement button to change from default to text.
-     * - The search input is not fully stylable by default. In Chrome and Safari on
-     *   OSX/iOS you can't control font, padding, border, or background. In Chrome
-     *   and Safari on Windows you can't control border properly. It will apply
-     *   border-width but will only show a border color (which cannot be controlled)
-     *   for the outer 1px of that border. Applying -webkit-appearance: textfield
-     *   addresses these issues without removing the benefits of search inputs (e.g.
-     *   showing past searches). Safari (but not Chrome) will clip the cancel button
-     *   on when it has padding (and textfield appearance).
-     */
-/**
-     * 1. Change font properties to `inherit` in all browsers (opinionated).
-     * 2. Remove the margin in Firefox and Safari.
-     * 3. Address `font-family` inconsistency between `textarea` and other form in IE 7
-     * 4. Improve appearance and consistency with IE 6/7.
-     */
-button,
-input,
-optgroup,
-select,
-textarea {
-  font: inherit;
-  /* 1 */
-  margin: 0;
-  /* 2 */ }
-
-/**
-     * Show the overflow in IE.
-     */
-button {
-  overflow: visible; }
-
-/**
-     * Remove the inheritance of text transform in Edge, Firefox, and IE.
-     * 1. Remove the inheritance of text transform in Firefox.
-     */
-button,
-select {
-  /* 1 */
-  text-transform: none; }
-
-/**
-     * 1. Prevent a WebKit bug where (2) destroys native `audio` and `video`
-     *    controls in Android 4.
-     * 2. Correct the inability to style clickable types in iOS and Safari.
-     */
-button,
-html [type="button"],
-[type="reset"],
-[type="submit"] {
-  -webkit-appearance: button;
-  /* 2 */ }
-
-button,
-[type="button"],
-[type="reset"],
-[type="submit"] {
-  /**
-       * Remove the inner border and padding in Firefox.
-       */
-  /**
-       * Restore the focus styles unset by the previous rule.
-       */ }
-  button::-moz-focus-inner,
-  [type="button"]::-moz-focus-inner,
-  [type="reset"]::-moz-focus-inner,
-  [type="submit"]::-moz-focus-inner {
-    border-style: none;
-    padding: 0; }
-  button:-moz-focusring,
-  [type="button"]:-moz-focusring,
-  [type="reset"]:-moz-focusring,
-  [type="submit"]:-moz-focusring {
-    outline: 1px dotted ButtonText; }
-
-/**
-     * Show the overflow in Edge.
-     */
-input {
-  overflow: visible; }
-
-/**
-     * 1. Add the correct box sizing in IE <11.
-     * 2. Remove the padding in IE <11.
-     * 3. Remove excess padding in IE 7.
-     *    Known issue: excess padding remains in IE 6.
-     */
-[type="checkbox"],
-[type="radio"] {
-  box-sizing: border-box;
-  /* 1 */
-  padding: 0;
-  /* 2 */ }
-
-/**
-     * Correct the cursor style of increment and decrement buttons in Chrome.
-     */
-[type="number"]::-webkit-inner-spin-button,
-[type="number"]::-webkit-outer-spin-button {
-  height: auto; }
-
-/**
-     * 1. Correct the odd appearance in Chrome and Safari.
-     * 2. Correct the outline style in Safari.
-     */
-[type="search"] {
-  -webkit-appearance: textfield;
-  /* 1 */
-  outline-offset: -2px;
-  /* 2 */
-  /**
-       * Remove the inner padding and cancel buttons in Chrome and Safari on OS X.
-       */ }
-  [type="search"]::-webkit-search-cancel-button, [type="search"]::-webkit-search-decoration {
-    -webkit-appearance: none; }
-
-/**
-     * Correct the text style of placeholders in Chrome, Edge, and Safari.
-     */
-::-webkit-input-placeholder {
-  color: inherit;
-  opacity: 0.54; }
-
-/**
-     * 1. Correct the inability to style clickable types in iOS and Safari.
-     * 2. Change font properties to `inherit` in Safari.
-     */
-::-webkit-file-upload-button {
-  -webkit-appearance: button;
-  /* 1 */
-  font: inherit;
-  /* 2 */ }
-
-/**
-     * Change the border, margin, and padding in all browsers (opinionated).
-     */
-fieldset {
-  border: 1px solid #c0c0c0;
-  margin: 0 2px;
-  padding: 0.35em 0.625em 0.75em; }
-
-/**
-     * 1. Correct the text wrapping in Edge and IE.
-     * 2. Correct the color inheritance from `fieldset` elements in IE.
-     * 3. Remove the padding so developers are not caught out when they zero out
-     *    `fieldset` elements in all browsers.
-     * 4. Correct alignment displayed oddly in IE 6/7.
-     */
-legend {
-  box-sizing: border-box;
-  /* 1 */
-  display: table;
-  /* 1 */
-  max-width: 100%;
-  /* 1 */
-  white-space: normal;
-  /* 1 */
-  color: inherit;
-  /* 2 */
-  padding: 0;
-  /* 3 */ }
-
-/**
-     * Restore the font weight unset by a previous rule.
-     */
-optgroup {
-  font-weight: bold; }
-
-/**
-     * Remove the default vertical scrollbar in IE.
-     */
-textarea {
-  overflow: auto; }
diff --git a/test/fixtures/variables/support-for/ie11/input.scss b/test/fixtures/variables/support-for/ie11/input.scss
deleted file mode 100644
index 86a8fae..0000000
--- a/test/fixtures/variables/support-for/ie11/input.scss
+++ /dev/null
@@ -1,6 +0,0 @@
-$support-for: (
-  ie: 11,
-);
-
-@import 'normalize';
-@include normalize();
diff --git a/test/fixtures/variables/support-for/ie11/output.css b/test/fixtures/variables/support-for/ie11/output.css
deleted file mode 100644
index 0f75d8a..0000000
--- a/test/fixtures/variables/support-for/ie11/output.css
+++ /dev/null
@@ -1,395 +0,0 @@
-/*! normalize-scss | MIT/GPLv2 License | bit.ly/normalize-scss */
-/**
-     * 1. Change the default font family in all browsers (opinionated).
-     * 2. Prevent adjustments of font size after orientation changes in IE and iOS.
-     */
-html {
-  font-family: sans-serif;
-  /* 1 */
-  -ms-text-size-adjust: 100%;
-  /* 2 */
-  -webkit-text-size-adjust: 100%;
-  /* 2 */ }
-
-/**
-     * Remove the margin in all browsers (opinionated).
-     */
-body {
-  margin: 0; }
-
-/* HTML5 display definitions
-       ========================================================================== */
-/**
-     * Add the correct display in IE <10.
-     * Add the correct display in Edge, IE, and Firefox for `details` or `summary`.
-     * Add the correct display in IE for `main`.
-     */
-article,
-aside,
-details,
-figcaption,
-figure,
-footer,
-header,
-main,
-menu,
-nav,
-section,
-summary {
-  display: block; }
-
-/**
-     * Add the correct display in IE <10.
-     */
-audio,
-canvas,
-progress,
-video {
-  display: inline-block; }
-
-/**
-     * Add the correct display and remove excess height in iOS 4-7.
-     */
-audio:not([controls]) {
-  display: none;
-  height: 0; }
-
-/**
-     * Add the correct vertical alignment in Chrome, Firefox, and Opera.
-     */
-progress {
-  vertical-align: baseline; }
-
-/**
-     * Add the correct display in IE <11, Safari <8, and Firefox <22.
-     * 1. Add the correct display in IE.
-     */
-template,
-[hidden] {
-  display: none; }
-
-/* Links
-       ========================================================================== */
-/**
-     * 1. Remove the gray background on active links in IE 10.
-     * 2. Remove gaps in links underline in iOS 8+ and Safari 8+.
-     */
-a {
-  background-color: transparent;
-  /* 1 */
-  -webkit-text-decoration-skip: objects;
-  /* 2 */ }
-
-/**
-     * Remove the outline on focused links when they are also active or hovered
-     * in all browsers (opinionated).
-     */
-a:active,
-a:hover {
-  outline-width: 0; }
-
-/* Text-level semantics
-       ========================================================================== */
-/**
-     * 1. Remove the bottom border in Firefox <40.
-     * 2. Add the correct text decoration in Chrome, Edge, IE, Opera, and Safari.
-     */
-abbr[title] {
-  border-bottom: none;
-  /* 1 */
-  text-decoration: underline;
-  /* 2 */
-  text-decoration: underline dotted;
-  /* 2 */ }
-
-/**
-     * Prevent the duplicate application of `bolder` by the next rule in Safari 6.
-     */
-b,
-strong {
-  font-weight: inherit; }
-
-/**
-     * Add the correct font weight in Chrome, Edge, and Safari.
-     */
-b,
-strong {
-  font-weight: bolder; }
-
-/**
-     * 1. Correct the inheritance and scaling of font size in all browsers.
-     * 2. Correct the odd `em` font sizing in all browsers.
-     */
-code,
-kbd,
-samp {
-  font-family: monospace, monospace;
-  font-size: 1em; }
-
-/**
-     * Add the correct font style in Android <4.4.
-     */
-dfn {
-  font-style: italic; }
-
-/**
-     * Correct the font size and margin on `h1` elements within `section` and
-     * `article` contexts in Chrome, Firefox, and Safari.
-     */
-h1 {
-  font-size: 2em;
-  /* Set 1 unit of vertical rhythm on the top and bottom margins. */
-  margin: 0.75em 0; }
-
-/**
-     * Add the correct background and color in IE <10.
-     */
-mark {
-  background-color: #ff0;
-  color: #000; }
-
-/**
-     * Add the correct font size in all browsers.
-     */
-small {
-  font-size: 80%; }
-
-/**
-     * Prevent `sub` and `sup` elements from affecting the line height in
-     * all browsers.
-     */
-sub,
-sup {
-  font-size: 75%;
-  line-height: 0;
-  position: relative;
-  vertical-align: baseline; }
-
-sub {
-  bottom: -0.25em; }
-
-sup {
-  top: -0.5em; }
-
-/* Embedded content
-       ========================================================================== */
-/**
-     * Remove the border on images inside links in IE <11.
-     */
-img {
-  border-style: none; }
-
-/**
-     * Hide the overflow in IE.
-     */
-svg:not(:root) {
-  overflow: hidden; }
-
-/* Grouping content
-       ========================================================================== */
-/**
-     * Add the correct margin in IE 8.
-     */
-figure {
-  margin: 1.5em 40px; }
-
-/**
-     * 1. Add the correct box sizing in Firefox.
-     * 2. Show the overflow in Edge and IE.
-     */
-hr {
-  box-sizing: content-box;
-  /* 1 */
-  height: 0;
-  /* 1 */
-  overflow: visible;
-  /* 2 */ }
-
-pre {
-  font-family: monospace, monospace;
-  font-size: 1em; }
-
-/* Forms
-       ========================================================================== */
-/**
-     * Known issues:
-     * - By default, Chrome on OS X and Safari on OS X allow very limited styling of
-     *   select, unless a border property is set. The default font weight on
-     *   optgroup elements cannot safely be changed in Chrome on OSX and Safari on
-     *   OS X.
-     * - It is recommended that you do not style checkbox and radio inputs as
-     *   Firefox's implementation does not respect box-sizing, padding, or width.
-     * - Certain font size values applied to number inputs cause the cursor style of
-     *   the decrement button to change from default to text.
-     * - The search input is not fully stylable by default. In Chrome and Safari on
-     *   OSX/iOS you can't control font, padding, border, or background. In Chrome
-     *   and Safari on Windows you can't control border properly. It will apply
-     *   border-width but will only show a border color (which cannot be controlled)
-     *   for the outer 1px of that border. Applying -webkit-appearance: textfield
-     *   addresses these issues without removing the benefits of search inputs (e.g.
-     *   showing past searches). Safari (but not Chrome) will clip the cancel button
-     *   on when it has padding (and textfield appearance).
-     */
-/**
-     * 1. Change font properties to `inherit` in all browsers (opinionated).
-     * 2. Remove the margin in Firefox and Safari.
-     * 3. Address `font-family` inconsistency between `textarea` and other form in IE 7
-     * 4. Improve appearance and consistency with IE 6/7.
-     */
-button,
-input,
-optgroup,
-select,
-textarea {
-  font: inherit;
-  /* 1 */
-  margin: 0;
-  /* 2 */ }
-
-/**
-     * Show the overflow in IE.
-     */
-button {
-  overflow: visible; }
-
-/**
-     * Remove the inheritance of text transform in Edge, Firefox, and IE.
-     * 1. Remove the inheritance of text transform in Firefox.
-     */
-button,
-select {
-  /* 1 */
-  text-transform: none; }
-
-/**
-     * 1. Prevent a WebKit bug where (2) destroys native `audio` and `video`
-     *    controls in Android 4.
-     * 2. Correct the inability to style clickable types in iOS and Safari.
-     */
-button,
-html [type="button"],
-[type="reset"],
-[type="submit"] {
-  -webkit-appearance: button;
-  /* 2 */ }
-
-button,
-[type="button"],
-[type="reset"],
-[type="submit"] {
-  /**
-       * Remove the inner border and padding in Firefox.
-       */
-  /**
-       * Restore the focus styles unset by the previous rule.
-       */ }
-  button::-moz-focus-inner,
-  [type="button"]::-moz-focus-inner,
-  [type="reset"]::-moz-focus-inner,
-  [type="submit"]::-moz-focus-inner {
-    border-style: none;
-    padding: 0; }
-  button:-moz-focusring,
-  [type="button"]:-moz-focusring,
-  [type="reset"]:-moz-focusring,
-  [type="submit"]:-moz-focusring {
-    outline: 1px dotted ButtonText; }
-
-/**
-     * Show the overflow in Edge.
-     */
-input {
-  overflow: visible; }
-
-/**
-     * 1. Add the correct box sizing in IE <11.
-     * 2. Remove the padding in IE <11.
-     * 3. Remove excess padding in IE 7.
-     *    Known issue: excess padding remains in IE 6.
-     */
-[type="checkbox"],
-[type="radio"] {
-  box-sizing: border-box;
-  /* 1 */
-  padding: 0;
-  /* 2 */ }
-
-/**
-     * Correct the cursor style of increment and decrement buttons in Chrome.
-     */
-[type="number"]::-webkit-inner-spin-button,
-[type="number"]::-webkit-outer-spin-button {
-  height: auto; }
-
-/**
-     * 1. Correct the odd appearance in Chrome and Safari.
-     * 2. Correct the outline style in Safari.
-     */
-[type="search"] {
-  -webkit-appearance: textfield;
-  /* 1 */
-  outline-offset: -2px;
-  /* 2 */
-  /**
-       * Remove the inner padding and cancel buttons in Chrome and Safari on OS X.
-       */ }
-  [type="search"]::-webkit-search-cancel-button, [type="search"]::-webkit-search-decoration {
-    -webkit-appearance: none; }
-
-/**
-     * Correct the text style of placeholders in Chrome, Edge, and Safari.
-     */
-::-webkit-input-placeholder {
-  color: inherit;
-  opacity: 0.54; }
-
-/**
-     * 1. Correct the inability to style clickable types in iOS and Safari.
-     * 2. Change font properties to `inherit` in Safari.
-     */
-::-webkit-file-upload-button {
-  -webkit-appearance: button;
-  /* 1 */
-  font: inherit;
-  /* 2 */ }
-
-/**
-     * Change the border, margin, and padding in all browsers (opinionated).
-     */
-fieldset {
-  border: 1px solid #c0c0c0;
-  margin: 0 2px;
-  padding: 0.35em 0.625em 0.75em; }
-
-/**
-     * 1. Correct the text wrapping in Edge and IE.
-     * 2. Correct the color inheritance from `fieldset` elements in IE.
-     * 3. Remove the padding so developers are not caught out when they zero out
-     *    `fieldset` elements in all browsers.
-     * 4. Correct alignment displayed oddly in IE 6/7.
-     */
-legend {
-  box-sizing: border-box;
-  /* 1 */
-  display: table;
-  /* 1 */
-  max-width: 100%;
-  /* 1 */
-  white-space: normal;
-  /* 1 */
-  color: inherit;
-  /* 2 */
-  padding: 0;
-  /* 3 */ }
-
-/**
-     * Restore the font weight unset by a previous rule.
-     */
-optgroup {
-  font-weight: bold; }
-
-/**
-     * Remove the default vertical scrollbar in IE.
-     */
-textarea {
-  overflow: auto; }
diff --git a/test/fixtures/variables/support-for/ie6/input.scss b/test/fixtures/variables/support-for/ie6/input.scss
deleted file mode 100644
index dc6fe69..0000000
--- a/test/fixtures/variables/support-for/ie6/input.scss
+++ /dev/null
@@ -1,6 +0,0 @@
-$support-for: (
-  ie: 6,
-);
-
-@import 'normalize';
-@include normalize();
diff --git a/test/fixtures/variables/support-for/ie6/output.css b/test/fixtures/variables/support-for/ie6/output.css
deleted file mode 100644
index a8cf119..0000000
--- a/test/fixtures/variables/support-for/ie6/output.css
+++ /dev/null
@@ -1,479 +0,0 @@
-/*! normalize-scss | MIT/GPLv2 License | bit.ly/normalize-scss */
-/**
-     * 1. Change the default font family in all browsers (opinionated).
-     * 2. Prevent adjustments of font size after orientation changes in IE and iOS.
-     */
-html {
-  font-size: 100%;
-  font-family: sans-serif;
-  /* 1 */
-  -ms-text-size-adjust: 100%;
-  /* 2 */
-  -webkit-text-size-adjust: 100%;
-  /* 2 */ }
-
-/**
-     * Remove the margin in all browsers (opinionated).
-     */
-body {
-  margin: 0; }
-
-/* HTML5 display definitions
-       ========================================================================== */
-/**
-     * Add the correct display in IE <10.
-     * Add the correct display in Edge, IE, and Firefox for `details` or `summary`.
-     * Add the correct display in IE for `main`.
-     */
-article,
-aside,
-details,
-figcaption,
-figure,
-footer,
-header,
-main,
-menu,
-nav,
-section,
-summary {
-  display: block; }
-
-/**
-     * Add the correct display in IE <10.
-     */
-audio,
-canvas,
-progress,
-video {
-  display: inline-block;
-  *display: inline;
-  *zoom: 1; }
-
-/**
-     * Add the correct display and remove excess height in iOS 4-7.
-     */
-audio:not([controls]) {
-  display: none;
-  height: 0; }
-
-/**
-     * Add the correct vertical alignment in Chrome, Firefox, and Opera.
-     */
-progress {
-  vertical-align: baseline; }
-
-/**
-     * Add the correct display in IE <11, Safari <8, and Firefox <22.
-     * 1. Add the correct display in IE.
-     */
-template,
-[hidden] {
-  display: none; }
-
-/* Links
-       ========================================================================== */
-/**
-     * 1. Remove the gray background on active links in IE 10.
-     * 2. Remove gaps in links underline in iOS 8+ and Safari 8+.
-     */
-a {
-  background-color: transparent;
-  /* 1 */
-  -webkit-text-decoration-skip: objects;
-  /* 2 */ }
-
-/**
-     * Remove the outline on focused links when they are also active or hovered
-     * in all browsers (opinionated).
-     */
-a:active,
-a:hover {
-  outline-width: 0; }
-
-/* Text-level semantics
-       ========================================================================== */
-/**
-     * 1. Remove the bottom border in Firefox <40.
-     * 2. Add the correct text decoration in Chrome, Edge, IE, Opera, and Safari.
-     */
-abbr[title] {
-  border-bottom: none;
-  /* 1 */
-  text-decoration: underline;
-  /* 2 */
-  text-decoration: underline dotted;
-  /* 2 */ }
-
-/**
-     * Prevent the duplicate application of `bolder` by the next rule in Safari 6.
-     */
-b,
-strong {
-  font-weight: inherit; }
-
-/**
-     * Add the correct font weight in Chrome, Edge, and Safari.
-     */
-b,
-strong {
-  font-weight: bolder; }
-
-/**
-     * 1. Correct the inheritance and scaling of font size in all browsers.
-     * 2. Correct the odd `em` font sizing in all browsers.
-     */
-code,
-kbd,
-samp {
-  font-family: monospace, monospace;
-  _font-family: 'courier new', monospace;
-  font-size: 1em; }
-
-/**
-     * Add the correct font style in Android <4.4.
-     */
-dfn {
-  font-style: italic; }
-
-/**
-     * Correct the font size and margin on `h1` elements within `section` and
-     * `article` contexts in Chrome, Firefox, and Safari.
-     */
-h1 {
-  font-size: 2em;
-  /* Set 1 unit of vertical rhythm on the top and bottom margins. */
-  margin: 0.75em 0; }
-
-h2 {
-  font-size: 1.5em;
-  margin: 1em 0; }
-
-h3 {
-  font-size: 1.17em;
-  margin: 1.28205em 0; }
-
-h4 {
-  font-size: 1em;
-  margin: 1.5em 0; }
-
-h5 {
-  font-size: 0.83em;
-  margin: 1.80723em 0; }
-
-h6 {
-  font-size: 0.67em;
-  margin: 2.23881em 0; }
-
-/**
-     * Add the correct background and color in IE <10.
-     */
-mark {
-  background-color: #ff0;
-  color: #000; }
-
-/**
-     * Add the correct font size in all browsers.
-     */
-small {
-  font-size: 80%; }
-
-/**
-     * Prevent `sub` and `sup` elements from affecting the line height in
-     * all browsers.
-     */
-sub,
-sup {
-  font-size: 75%;
-  line-height: 0;
-  position: relative;
-  vertical-align: baseline; }
-
-sub {
-  bottom: -0.25em; }
-
-sup {
-  top: -0.5em; }
-
-/* Embedded content
-       ========================================================================== */
-/**
-     * Remove the border on images inside links in IE <11.
-     */
-img {
-  border-style: none;
-  /* Improve image quality when scaled in IE 7. */
-  -ms-interpolation-mode: bicubic; }
-
-/**
-     * Hide the overflow in IE.
-     */
-svg:not(:root) {
-  overflow: hidden; }
-
-/* Grouping content
-       ========================================================================== */
-/**
-       * Set 1 unit of vertical rhythm on the top and bottom margin.
-       */
-blockquote {
-  margin: 1.5em 40px; }
-
-/**
-       * Address margins set differently in IE 6/7.
-       */
-dl,
-menu,
-ol,
-ul {
-  margin: 1.5em 0; }
-
-dd {
-  margin: 0 0 0 40px; }
-
-/**
-       * Address paddings set differently in IE 6/7.
-       */
-menu,
-ol,
-ul {
-  padding: 0 0 0 40px; }
-
-/**
-       * Correct list images handled incorrectly in IE 7.
-       */
-nav ul,
-nav ol {
-  list-style: none;
-  list-style-image: none; }
-
-/**
-     * Add the correct margin in IE 8.
-     */
-figure {
-  margin: 1.5em 40px; }
-
-/**
-     * 1. Add the correct box sizing in Firefox.
-     * 2. Show the overflow in Edge and IE.
-     */
-hr {
-  box-sizing: content-box;
-  /* 1 */
-  height: 0;
-  /* 1 */
-  overflow: visible;
-  /* 2 */ }
-
-/**
-       * Set 1 unit of vertical rhythm on the top and bottom margin.
-       */
-p,
-pre {
-  margin: 1.5em 0; }
-
-pre {
-  font-family: monospace, monospace;
-  _font-family: 'courier new', monospace;
-  font-size: 1em; }
-
-/* Forms
-       ========================================================================== */
-/**
-     * Known issues:
-     * - By default, Chrome on OS X and Safari on OS X allow very limited styling of
-     *   select, unless a border property is set. The default font weight on
-     *   optgroup elements cannot safely be changed in Chrome on OSX and Safari on
-     *   OS X.
-     * - It is recommended that you do not style checkbox and radio inputs as
-     *   Firefox's implementation does not respect box-sizing, padding, or width.
-     * - Certain font size values applied to number inputs cause the cursor style of
-     *   the decrement button to change from default to text.
-     * - The search input is not fully stylable by default. In Chrome and Safari on
-     *   OSX/iOS you can't control font, padding, border, or background. In Chrome
-     *   and Safari on Windows you can't control border properly. It will apply
-     *   border-width but will only show a border color (which cannot be controlled)
-     *   for the outer 1px of that border. Applying -webkit-appearance: textfield
-     *   addresses these issues without removing the benefits of search inputs (e.g.
-     *   showing past searches). Safari (but not Chrome) will clip the cancel button
-     *   on when it has padding (and textfield appearance).
-     */
-/**
-       * Correct margin displayed oddly in IE 6/7.
-       */
-form {
-  margin: 0; }
-
-/**
-     * 1. Change font properties to `inherit` in all browsers (opinionated).
-     * 2. Remove the margin in Firefox and Safari.
-     * 3. Address `font-family` inconsistency between `textarea` and other form in IE 7
-     * 4. Improve appearance and consistency with IE 6/7.
-     */
-button,
-input,
-optgroup,
-select,
-textarea {
-  font: inherit;
-  /* 1 */
-  margin: 0;
-  /* 2 */
-  *font-family: sans-serif;
-  /* 3 */
-  *vertical-align: middle;
-  /* 4 */ }
-
-/**
-     * Show the overflow in IE.
-     */
-button {
-  overflow: visible; }
-
-/**
-     * Remove the inheritance of text transform in Edge, Firefox, and IE.
-     * 1. Remove the inheritance of text transform in Firefox.
-     */
-button,
-select {
-  /* 1 */
-  text-transform: none; }
-
-/**
-     * 1. Prevent a WebKit bug where (2) destroys native `audio` and `video`
-     *    controls in Android 4.
-     * 2. Correct the inability to style clickable types in iOS and Safari.
-     */
-button,
-html [type="button"],
-[type="reset"],
-[type="submit"] {
-  -webkit-appearance: button;
-  /* 2 */ }
-
-button,
-[type="button"],
-[type="reset"],
-[type="submit"] {
-  /**
-       * Remove the inner border and padding in Firefox.
-       */
-  /**
-       * Restore the focus styles unset by the previous rule.
-       */ }
-  button::-moz-focus-inner,
-  [type="button"]::-moz-focus-inner,
-  [type="reset"]::-moz-focus-inner,
-  [type="submit"]::-moz-focus-inner {
-    border-style: none;
-    padding: 0; }
-  button:-moz-focusring,
-  [type="button"]:-moz-focusring,
-  [type="reset"]:-moz-focusring,
-  [type="submit"]:-moz-focusring {
-    outline: 1px dotted ButtonText; }
-
-/**
-     * Show the overflow in Edge.
-     */
-input {
-  overflow: visible; }
-
-/**
-     * 1. Add the correct box sizing in IE <11.
-     * 2. Remove the padding in IE <11.
-     * 3. Remove excess padding in IE 7.
-     *    Known issue: excess padding remains in IE 6.
-     */
-[type="checkbox"],
-[type="radio"] {
-  box-sizing: border-box;
-  /* 1 */
-  padding: 0;
-  /* 2 */
-  *height: 13px;
-  /* 3 */
-  *width: 13px;
-  /* 3 */ }
-
-/**
-     * Correct the cursor style of increment and decrement buttons in Chrome.
-     */
-[type="number"]::-webkit-inner-spin-button,
-[type="number"]::-webkit-outer-spin-button {
-  height: auto; }
-
-/**
-     * 1. Correct the odd appearance in Chrome and Safari.
-     * 2. Correct the outline style in Safari.
-     */
-[type="search"] {
-  -webkit-appearance: textfield;
-  /* 1 */
-  outline-offset: -2px;
-  /* 2 */
-  /**
-       * Remove the inner padding and cancel buttons in Chrome and Safari on OS X.
-       */ }
-  [type="search"]::-webkit-search-cancel-button, [type="search"]::-webkit-search-decoration {
-    -webkit-appearance: none; }
-
-/**
-     * Correct the text style of placeholders in Chrome, Edge, and Safari.
-     */
-::-webkit-input-placeholder {
-  color: inherit;
-  opacity: 0.54; }
-
-/**
-     * 1. Correct the inability to style clickable types in iOS and Safari.
-     * 2. Change font properties to `inherit` in Safari.
-     */
-::-webkit-file-upload-button {
-  -webkit-appearance: button;
-  /* 1 */
-  font: inherit;
-  /* 2 */ }
-
-/**
-     * Change the border, margin, and padding in all browsers (opinionated).
-     */
-fieldset {
-  border: 1px solid #c0c0c0;
-  margin: 0 2px;
-  padding: 0.35em 0.625em 0.75em; }
-
-/**
-     * 1. Correct the text wrapping in Edge and IE.
-     * 2. Correct the color inheritance from `fieldset` elements in IE.
-     * 3. Remove the padding so developers are not caught out when they zero out
-     *    `fieldset` elements in all browsers.
-     * 4. Correct alignment displayed oddly in IE 6/7.
-     */
-legend {
-  box-sizing: border-box;
-  /* 1 */
-  display: table;
-  /* 1 */
-  max-width: 100%;
-  /* 1 */
-  white-space: normal;
-  /* 1 */
-  color: inherit;
-  /* 2 */
-  padding: 0;
-  /* 3 */
-  *margin-left: -7px;
-  /* 4 */ }
-
-/**
-     * Restore the font weight unset by a previous rule.
-     */
-optgroup {
-  font-weight: bold; }
-
-/**
-     * Remove the default vertical scrollbar in IE.
-     */
-textarea {
-  overflow: auto; }
diff --git a/test/fixtures/variables/support-for/ie7/input.scss b/test/fixtures/variables/support-for/ie7/input.scss
deleted file mode 100644
index c80a605..0000000
--- a/test/fixtures/variables/support-for/ie7/input.scss
+++ /dev/null
@@ -1,6 +0,0 @@
-$support-for: (
-  ie: 7,
-);
-
-@import 'normalize';
-@include normalize();
diff --git a/test/fixtures/variables/support-for/ie7/output.css b/test/fixtures/variables/support-for/ie7/output.css
deleted file mode 100644
index 2030ee7..0000000
--- a/test/fixtures/variables/support-for/ie7/output.css
+++ /dev/null
@@ -1,477 +0,0 @@
-/*! normalize-scss | MIT/GPLv2 License | bit.ly/normalize-scss */
-/**
-     * 1. Change the default font family in all browsers (opinionated).
-     * 2. Prevent adjustments of font size after orientation changes in IE and iOS.
-     */
-html {
-  font-size: 100%;
-  font-family: sans-serif;
-  /* 1 */
-  -ms-text-size-adjust: 100%;
-  /* 2 */
-  -webkit-text-size-adjust: 100%;
-  /* 2 */ }
-
-/**
-     * Remove the margin in all browsers (opinionated).
-     */
-body {
-  margin: 0; }
-
-/* HTML5 display definitions
-       ========================================================================== */
-/**
-     * Add the correct display in IE <10.
-     * Add the correct display in Edge, IE, and Firefox for `details` or `summary`.
-     * Add the correct display in IE for `main`.
-     */
-article,
-aside,
-details,
-figcaption,
-figure,
-footer,
-header,
-main,
-menu,
-nav,
-section,
-summary {
-  display: block; }
-
-/**
-     * Add the correct display in IE <10.
-     */
-audio,
-canvas,
-progress,
-video {
-  display: inline-block;
-  *display: inline;
-  *zoom: 1; }
-
-/**
-     * Add the correct display and remove excess height in iOS 4-7.
-     */
-audio:not([controls]) {
-  display: none;
-  height: 0; }
-
-/**
-     * Add the correct vertical alignment in Chrome, Firefox, and Opera.
-     */
-progress {
-  vertical-align: baseline; }
-
-/**
-     * Add the correct display in IE <11, Safari <8, and Firefox <22.
-     * 1. Add the correct display in IE.
-     */
-template,
-[hidden] {
-  display: none; }
-
-/* Links
-       ========================================================================== */
-/**
-     * 1. Remove the gray background on active links in IE 10.
-     * 2. Remove gaps in links underline in iOS 8+ and Safari 8+.
-     */
-a {
-  background-color: transparent;
-  /* 1 */
-  -webkit-text-decoration-skip: objects;
-  /* 2 */ }
-
-/**
-     * Remove the outline on focused links when they are also active or hovered
-     * in all browsers (opinionated).
-     */
-a:active,
-a:hover {
-  outline-width: 0; }
-
-/* Text-level semantics
-       ========================================================================== */
-/**
-     * 1. Remove the bottom border in Firefox <40.
-     * 2. Add the correct text decoration in Chrome, Edge, IE, Opera, and Safari.
-     */
-abbr[title] {
-  border-bottom: none;
-  /* 1 */
-  text-decoration: underline;
-  /* 2 */
-  text-decoration: underline dotted;
-  /* 2 */ }
-
-/**
-     * Prevent the duplicate application of `bolder` by the next rule in Safari 6.
-     */
-b,
-strong {
-  font-weight: inherit; }
-
-/**
-     * Add the correct font weight in Chrome, Edge, and Safari.
-     */
-b,
-strong {
-  font-weight: bolder; }
-
-/**
-     * 1. Correct the inheritance and scaling of font size in all browsers.
-     * 2. Correct the odd `em` font sizing in all browsers.
-     */
-code,
-kbd,
-samp {
-  font-family: monospace, monospace;
-  font-size: 1em; }
-
-/**
-     * Add the correct font style in Android <4.4.
-     */
-dfn {
-  font-style: italic; }
-
-/**
-     * Correct the font size and margin on `h1` elements within `section` and
-     * `article` contexts in Chrome, Firefox, and Safari.
-     */
-h1 {
-  font-size: 2em;
-  /* Set 1 unit of vertical rhythm on the top and bottom margins. */
-  margin: 0.75em 0; }
-
-h2 {
-  font-size: 1.5em;
-  margin: 1em 0; }
-
-h3 {
-  font-size: 1.17em;
-  margin: 1.28205em 0; }
-
-h4 {
-  font-size: 1em;
-  margin: 1.5em 0; }
-
-h5 {
-  font-size: 0.83em;
-  margin: 1.80723em 0; }
-
-h6 {
-  font-size: 0.67em;
-  margin: 2.23881em 0; }
-
-/**
-     * Add the correct background and color in IE <10.
-     */
-mark {
-  background-color: #ff0;
-  color: #000; }
-
-/**
-     * Add the correct font size in all browsers.
-     */
-small {
-  font-size: 80%; }
-
-/**
-     * Prevent `sub` and `sup` elements from affecting the line height in
-     * all browsers.
-     */
-sub,
-sup {
-  font-size: 75%;
-  line-height: 0;
-  position: relative;
-  vertical-align: baseline; }
-
-sub {
-  bottom: -0.25em; }
-
-sup {
-  top: -0.5em; }
-
-/* Embedded content
-       ========================================================================== */
-/**
-     * Remove the border on images inside links in IE <11.
-     */
-img {
-  border-style: none;
-  /* Improve image quality when scaled in IE 7. */
-  -ms-interpolation-mode: bicubic; }
-
-/**
-     * Hide the overflow in IE.
-     */
-svg:not(:root) {
-  overflow: hidden; }
-
-/* Grouping content
-       ========================================================================== */
-/**
-       * Set 1 unit of vertical rhythm on the top and bottom margin.
-       */
-blockquote {
-  margin: 1.5em 40px; }
-
-/**
-       * Address margins set differently in IE 6/7.
-       */
-dl,
-menu,
-ol,
-ul {
-  margin: 1.5em 0; }
-
-dd {
-  margin: 0 0 0 40px; }
-
-/**
-       * Address paddings set differently in IE 6/7.
-       */
-menu,
-ol,
-ul {
-  padding: 0 0 0 40px; }
-
-/**
-       * Correct list images handled incorrectly in IE 7.
-       */
-nav ul,
-nav ol {
-  list-style: none;
-  list-style-image: none; }
-
-/**
-     * Add the correct margin in IE 8.
-     */
-figure {
-  margin: 1.5em 40px; }
-
-/**
-     * 1. Add the correct box sizing in Firefox.
-     * 2. Show the overflow in Edge and IE.
-     */
-hr {
-  box-sizing: content-box;
-  /* 1 */
-  height: 0;
-  /* 1 */
-  overflow: visible;
-  /* 2 */ }
-
-/**
-       * Set 1 unit of vertical rhythm on the top and bottom margin.
-       */
-p,
-pre {
-  margin: 1.5em 0; }
-
-pre {
-  font-family: monospace, monospace;
-  font-size: 1em; }
-
-/* Forms
-       ========================================================================== */
-/**
-     * Known issues:
-     * - By default, Chrome on OS X and Safari on OS X allow very limited styling of
-     *   select, unless a border property is set. The default font weight on
-     *   optgroup elements cannot safely be changed in Chrome on OSX and Safari on
-     *   OS X.
-     * - It is recommended that you do not style checkbox and radio inputs as
-     *   Firefox's implementation does not respect box-sizing, padding, or width.
-     * - Certain font size values applied to number inputs cause the cursor style of
-     *   the decrement button to change from default to text.
-     * - The search input is not fully stylable by default. In Chrome and Safari on
-     *   OSX/iOS you can't control font, padding, border, or background. In Chrome
-     *   and Safari on Windows you can't control border properly. It will apply
-     *   border-width but will only show a border color (which cannot be controlled)
-     *   for the outer 1px of that border. Applying -webkit-appearance: textfield
-     *   addresses these issues without removing the benefits of search inputs (e.g.
-     *   showing past searches). Safari (but not Chrome) will clip the cancel button
-     *   on when it has padding (and textfield appearance).
-     */
-/**
-       * Correct margin displayed oddly in IE 6/7.
-       */
-form {
-  margin: 0; }
-
-/**
-     * 1. Change font properties to `inherit` in all browsers (opinionated).
-     * 2. Remove the margin in Firefox and Safari.
-     * 3. Address `font-family` inconsistency between `textarea` and other form in IE 7
-     * 4. Improve appearance and consistency with IE 6/7.
-     */
-button,
-input,
-optgroup,
-select,
-textarea {
-  font: inherit;
-  /* 1 */
-  margin: 0;
-  /* 2 */
-  *font-family: sans-serif;
-  /* 3 */
-  *vertical-align: middle;
-  /* 4 */ }
-
-/**
-     * Show the overflow in IE.
-     */
-button {
-  overflow: visible; }
-
-/**
-     * Remove the inheritance of text transform in Edge, Firefox, and IE.
-     * 1. Remove the inheritance of text transform in Firefox.
-     */
-button,
-select {
-  /* 1 */
-  text-transform: none; }
-
-/**
-     * 1. Prevent a WebKit bug where (2) destroys native `audio` and `video`
-     *    controls in Android 4.
-     * 2. Correct the inability to style clickable types in iOS and Safari.
-     */
-button,
-html [type="button"],
-[type="reset"],
-[type="submit"] {
-  -webkit-appearance: button;
-  /* 2 */ }
-
-button,
-[type="button"],
-[type="reset"],
-[type="submit"] {
-  /**
-       * Remove the inner border and padding in Firefox.
-       */
-  /**
-       * Restore the focus styles unset by the previous rule.
-       */ }
-  button::-moz-focus-inner,
-  [type="button"]::-moz-focus-inner,
-  [type="reset"]::-moz-focus-inner,
-  [type="submit"]::-moz-focus-inner {
-    border-style: none;
-    padding: 0; }
-  button:-moz-focusring,
-  [type="button"]:-moz-focusring,
-  [type="reset"]:-moz-focusring,
-  [type="submit"]:-moz-focusring {
-    outline: 1px dotted ButtonText; }
-
-/**
-     * Show the overflow in Edge.
-     */
-input {
-  overflow: visible; }
-
-/**
-     * 1. Add the correct box sizing in IE <11.
-     * 2. Remove the padding in IE <11.
-     * 3. Remove excess padding in IE 7.
-     *    Known issue: excess padding remains in IE 6.
-     */
-[type="checkbox"],
-[type="radio"] {
-  box-sizing: border-box;
-  /* 1 */
-  padding: 0;
-  /* 2 */
-  *height: 13px;
-  /* 3 */
-  *width: 13px;
-  /* 3 */ }
-
-/**
-     * Correct the cursor style of increment and decrement buttons in Chrome.
-     */
-[type="number"]::-webkit-inner-spin-button,
-[type="number"]::-webkit-outer-spin-button {
-  height: auto; }
-
-/**
-     * 1. Correct the odd appearance in Chrome and Safari.
-     * 2. Correct the outline style in Safari.
-     */
-[type="search"] {
-  -webkit-appearance: textfield;
-  /* 1 */
-  outline-offset: -2px;
-  /* 2 */
-  /**
-       * Remove the inner padding and cancel buttons in Chrome and Safari on OS X.
-       */ }
-  [type="search"]::-webkit-search-cancel-button, [type="search"]::-webkit-search-decoration {
-    -webkit-appearance: none; }
-
-/**
-     * Correct the text style of placeholders in Chrome, Edge, and Safari.
-     */
-::-webkit-input-placeholder {
-  color: inherit;
-  opacity: 0.54; }
-
-/**
-     * 1. Correct the inability to style clickable types in iOS and Safari.
-     * 2. Change font properties to `inherit` in Safari.
-     */
-::-webkit-file-upload-button {
-  -webkit-appearance: button;
-  /* 1 */
-  font: inherit;
-  /* 2 */ }
-
-/**
-     * Change the border, margin, and padding in all browsers (opinionated).
-     */
-fieldset {
-  border: 1px solid #c0c0c0;
-  margin: 0 2px;
-  padding: 0.35em 0.625em 0.75em; }
-
-/**
-     * 1. Correct the text wrapping in Edge and IE.
-     * 2. Correct the color inheritance from `fieldset` elements in IE.
-     * 3. Remove the padding so developers are not caught out when they zero out
-     *    `fieldset` elements in all browsers.
-     * 4. Correct alignment displayed oddly in IE 6/7.
-     */
-legend {
-  box-sizing: border-box;
-  /* 1 */
-  display: table;
-  /* 1 */
-  max-width: 100%;
-  /* 1 */
-  white-space: normal;
-  /* 1 */
-  color: inherit;
-  /* 2 */
-  padding: 0;
-  /* 3 */
-  *margin-left: -7px;
-  /* 4 */ }
-
-/**
-     * Restore the font weight unset by a previous rule.
-     */
-optgroup {
-  font-weight: bold; }
-
-/**
-     * Remove the default vertical scrollbar in IE.
-     */
-textarea {
-  overflow: auto; }
diff --git a/test/fixtures/variables/support-for/ie8/input.scss b/test/fixtures/variables/support-for/ie8/input.scss
deleted file mode 100644
index c06b51e..0000000
--- a/test/fixtures/variables/support-for/ie8/input.scss
+++ /dev/null
@@ -1,6 +0,0 @@
-$support-for: (
-  ie: 8,
-);
-
-@import 'normalize';
-@include normalize();
diff --git a/test/fixtures/variables/support-for/ie8/output.css b/test/fixtures/variables/support-for/ie8/output.css
deleted file mode 100644
index 0f75d8a..0000000
--- a/test/fixtures/variables/support-for/ie8/output.css
+++ /dev/null
@@ -1,395 +0,0 @@
-/*! normalize-scss | MIT/GPLv2 License | bit.ly/normalize-scss */
-/**
-     * 1. Change the default font family in all browsers (opinionated).
-     * 2. Prevent adjustments of font size after orientation changes in IE and iOS.
-     */
-html {
-  font-family: sans-serif;
-  /* 1 */
-  -ms-text-size-adjust: 100%;
-  /* 2 */
-  -webkit-text-size-adjust: 100%;
-  /* 2 */ }
-
-/**
-     * Remove the margin in all browsers (opinionated).
-     */
-body {
-  margin: 0; }
-
-/* HTML5 display definitions
-       ========================================================================== */
-/**
-     * Add the correct display in IE <10.
-     * Add the correct display in Edge, IE, and Firefox for `details` or `summary`.
-     * Add the correct display in IE for `main`.
-     */
-article,
-aside,
-details,
-figcaption,
-figure,
-footer,
-header,
-main,
-menu,
-nav,
-section,
-summary {
-  display: block; }
-
-/**
-     * Add the correct display in IE <10.
-     */
-audio,
-canvas,
-progress,
-video {
-  display: inline-block; }
-
-/**
-     * Add the correct display and remove excess height in iOS 4-7.
-     */
-audio:not([controls]) {
-  display: none;
-  height: 0; }
-
-/**
-     * Add the correct vertical alignment in Chrome, Firefox, and Opera.
-     */
-progress {
-  vertical-align: baseline; }
-
-/**
-     * Add the correct display in IE <11, Safari <8, and Firefox <22.
-     * 1. Add the correct display in IE.
-     */
-template,
-[hidden] {
-  display: none; }
-
-/* Links
-       ========================================================================== */
-/**
-     * 1. Remove the gray background on active links in IE 10.
-     * 2. Remove gaps in links underline in iOS 8+ and Safari 8+.
-     */
-a {
-  background-color: transparent;
-  /* 1 */
-  -webkit-text-decoration-skip: objects;
-  /* 2 */ }
-
-/**
-     * Remove the outline on focused links when they are also active or hovered
-     * in all browsers (opinionated).
-     */
-a:active,
-a:hover {
-  outline-width: 0; }
-
-/* Text-level semantics
-       ========================================================================== */
-/**
-     * 1. Remove the bottom border in Firefox <40.
-     * 2. Add the correct text decoration in Chrome, Edge, IE, Opera, and Safari.
-     */
-abbr[title] {
-  border-bottom: none;
-  /* 1 */
-  text-decoration: underline;
-  /* 2 */
-  text-decoration: underline dotted;
-  /* 2 */ }
-
-/**
-     * Prevent the duplicate application of `bolder` by the next rule in Safari 6.
-     */
-b,
-strong {
-  font-weight: inherit; }
-
-/**
-     * Add the correct font weight in Chrome, Edge, and Safari.
-     */
-b,
-strong {
-  font-weight: bolder; }
-
-/**
-     * 1. Correct the inheritance and scaling of font size in all browsers.
-     * 2. Correct the odd `em` font sizing in all browsers.
-     */
-code,
-kbd,
-samp {
-  font-family: monospace, monospace;
-  font-size: 1em; }
-
-/**
-     * Add the correct font style in Android <4.4.
-     */
-dfn {
-  font-style: italic; }
-
-/**
-     * Correct the font size and margin on `h1` elements within `section` and
-     * `article` contexts in Chrome, Firefox, and Safari.
-     */
-h1 {
-  font-size: 2em;
-  /* Set 1 unit of vertical rhythm on the top and bottom margins. */
-  margin: 0.75em 0; }
-
-/**
-     * Add the correct background and color in IE <10.
-     */
-mark {
-  background-color: #ff0;
-  color: #000; }
-
-/**
-     * Add the correct font size in all browsers.
-     */
-small {
-  font-size: 80%; }
-
-/**
-     * Prevent `sub` and `sup` elements from affecting the line height in
-     * all browsers.
-     */
-sub,
-sup {
-  font-size: 75%;
-  line-height: 0;
-  position: relative;
-  vertical-align: baseline; }
-
-sub {
-  bottom: -0.25em; }
-
-sup {
-  top: -0.5em; }
-
-/* Embedded content
-       ========================================================================== */
-/**
-     * Remove the border on images inside links in IE <11.
-     */
-img {
-  border-style: none; }
-
-/**
-     * Hide the overflow in IE.
-     */
-svg:not(:root) {
-  overflow: hidden; }
-
-/* Grouping content
-       ========================================================================== */
-/**
-     * Add the correct margin in IE 8.
-     */
-figure {
-  margin: 1.5em 40px; }
-
-/**
-     * 1. Add the correct box sizing in Firefox.
-     * 2. Show the overflow in Edge and IE.
-     */
-hr {
-  box-sizing: content-box;
-  /* 1 */
-  height: 0;
-  /* 1 */
-  overflow: visible;
-  /* 2 */ }
-
-pre {
-  font-family: monospace, monospace;
-  font-size: 1em; }
-
-/* Forms
-       ========================================================================== */
-/**
-     * Known issues:
-     * - By default, Chrome on OS X and Safari on OS X allow very limited styling of
-     *   select, unless a border property is set. The default font weight on
-     *   optgroup elements cannot safely be changed in Chrome on OSX and Safari on
-     *   OS X.
-     * - It is recommended that you do not style checkbox and radio inputs as
-     *   Firefox's implementation does not respect box-sizing, padding, or width.
-     * - Certain font size values applied to number inputs cause the cursor style of
-     *   the decrement button to change from default to text.
-     * - The search input is not fully stylable by default. In Chrome and Safari on
-     *   OSX/iOS you can't control font, padding, border, or background. In Chrome
-     *   and Safari on Windows you can't control border properly. It will apply
-     *   border-width but will only show a border color (which cannot be controlled)
-     *   for the outer 1px of that border. Applying -webkit-appearance: textfield
-     *   addresses these issues without removing the benefits of search inputs (e.g.
-     *   showing past searches). Safari (but not Chrome) will clip the cancel button
-     *   on when it has padding (and textfield appearance).
-     */
-/**
-     * 1. Change font properties to `inherit` in all browsers (opinionated).
-     * 2. Remove the margin in Firefox and Safari.
-     * 3. Address `font-family` inconsistency between `textarea` and other form in IE 7
-     * 4. Improve appearance and consistency with IE 6/7.
-     */
-button,
-input,
-optgroup,
-select,
-textarea {
-  font: inherit;
-  /* 1 */
-  margin: 0;
-  /* 2 */ }
-
-/**
-     * Show the overflow in IE.
-     */
-button {
-  overflow: visible; }
-
-/**
-     * Remove the inheritance of text transform in Edge, Firefox, and IE.
-     * 1. Remove the inheritance of text transform in Firefox.
-     */
-button,
-select {
-  /* 1 */
-  text-transform: none; }
-
-/**
-     * 1. Prevent a WebKit bug where (2) destroys native `audio` and `video`
-     *    controls in Android 4.
-     * 2. Correct the inability to style clickable types in iOS and Safari.
-     */
-button,
-html [type="button"],
-[type="reset"],
-[type="submit"] {
-  -webkit-appearance: button;
-  /* 2 */ }
-
-button,
-[type="button"],
-[type="reset"],
-[type="submit"] {
-  /**
-       * Remove the inner border and padding in Firefox.
-       */
-  /**
-       * Restore the focus styles unset by the previous rule.
-       */ }
-  button::-moz-focus-inner,
-  [type="button"]::-moz-focus-inner,
-  [type="reset"]::-moz-focus-inner,
-  [type="submit"]::-moz-focus-inner {
-    border-style: none;
-    padding: 0; }
-  button:-moz-focusring,
-  [type="button"]:-moz-focusring,
-  [type="reset"]:-moz-focusring,
-  [type="submit"]:-moz-focusring {
-    outline: 1px dotted ButtonText; }
-
-/**
-     * Show the overflow in Edge.
-     */
-input {
-  overflow: visible; }
-
-/**
-     * 1. Add the correct box sizing in IE <11.
-     * 2. Remove the padding in IE <11.
-     * 3. Remove excess padding in IE 7.
-     *    Known issue: excess padding remains in IE 6.
-     */
-[type="checkbox"],
-[type="radio"] {
-  box-sizing: border-box;
-  /* 1 */
-  padding: 0;
-  /* 2 */ }
-
-/**
-     * Correct the cursor style of increment and decrement buttons in Chrome.
-     */
-[type="number"]::-webkit-inner-spin-button,
-[type="number"]::-webkit-outer-spin-button {
-  height: auto; }
-
-/**
-     * 1. Correct the odd appearance in Chrome and Safari.
-     * 2. Correct the outline style in Safari.
-     */
-[type="search"] {
-  -webkit-appearance: textfield;
-  /* 1 */
-  outline-offset: -2px;
-  /* 2 */
-  /**
-       * Remove the inner padding and cancel buttons in Chrome and Safari on OS X.
-       */ }
-  [type="search"]::-webkit-search-cancel-button, [type="search"]::-webkit-search-decoration {
-    -webkit-appearance: none; }
-
-/**
-     * Correct the text style of placeholders in Chrome, Edge, and Safari.
-     */
-::-webkit-input-placeholder {
-  color: inherit;
-  opacity: 0.54; }
-
-/**
-     * 1. Correct the inability to style clickable types in iOS and Safari.
-     * 2. Change font properties to `inherit` in Safari.
-     */
-::-webkit-file-upload-button {
-  -webkit-appearance: button;
-  /* 1 */
-  font: inherit;
-  /* 2 */ }
-
-/**
-     * Change the border, margin, and padding in all browsers (opinionated).
-     */
-fieldset {
-  border: 1px solid #c0c0c0;
-  margin: 0 2px;
-  padding: 0.35em 0.625em 0.75em; }
-
-/**
-     * 1. Correct the text wrapping in Edge and IE.
-     * 2. Correct the color inheritance from `fieldset` elements in IE.
-     * 3. Remove the padding so developers are not caught out when they zero out
-     *    `fieldset` elements in all browsers.
-     * 4. Correct alignment displayed oddly in IE 6/7.
-     */
-legend {
-  box-sizing: border-box;
-  /* 1 */
-  display: table;
-  /* 1 */
-  max-width: 100%;
-  /* 1 */
-  white-space: normal;
-  /* 1 */
-  color: inherit;
-  /* 2 */
-  padding: 0;
-  /* 3 */ }
-
-/**
-     * Restore the font weight unset by a previous rule.
-     */
-optgroup {
-  font-weight: bold; }
-
-/**
-     * Remove the default vertical scrollbar in IE.
-     */
-textarea {
-  overflow: auto; }
diff --git a/test/fixtures/variables/support-for/ie9/input.scss b/test/fixtures/variables/support-for/ie9/input.scss
deleted file mode 100644
index 200f712..0000000
--- a/test/fixtures/variables/support-for/ie9/input.scss
+++ /dev/null
@@ -1,6 +0,0 @@
-$support-for: (
-  ie: 9,
-);
-
-@import 'normalize';
-@include normalize();
diff --git a/test/fixtures/variables/support-for/ie9/output.css b/test/fixtures/variables/support-for/ie9/output.css
deleted file mode 100644
index 0f75d8a..0000000
--- a/test/fixtures/variables/support-for/ie9/output.css
+++ /dev/null
@@ -1,395 +0,0 @@
-/*! normalize-scss | MIT/GPLv2 License | bit.ly/normalize-scss */
-/**
-     * 1. Change the default font family in all browsers (opinionated).
-     * 2. Prevent adjustments of font size after orientation changes in IE and iOS.
-     */
-html {
-  font-family: sans-serif;
-  /* 1 */
-  -ms-text-size-adjust: 100%;
-  /* 2 */
-  -webkit-text-size-adjust: 100%;
-  /* 2 */ }
-
-/**
-     * Remove the margin in all browsers (opinionated).
-     */
-body {
-  margin: 0; }
-
-/* HTML5 display definitions
-       ========================================================================== */
-/**
-     * Add the correct display in IE <10.
-     * Add the correct display in Edge, IE, and Firefox for `details` or `summary`.
-     * Add the correct display in IE for `main`.
-     */
-article,
-aside,
-details,
-figcaption,
-figure,
-footer,
-header,
-main,
-menu,
-nav,
-section,
-summary {
-  display: block; }
-
-/**
-     * Add the correct display in IE <10.
-     */
-audio,
-canvas,
-progress,
-video {
-  display: inline-block; }
-
-/**
-     * Add the correct display and remove excess height in iOS 4-7.
-     */
-audio:not([controls]) {
-  display: none;
-  height: 0; }
-
-/**
-     * Add the correct vertical alignment in Chrome, Firefox, and Opera.
-     */
-progress {
-  vertical-align: baseline; }
-
-/**
-     * Add the correct display in IE <11, Safari <8, and Firefox <22.
-     * 1. Add the correct display in IE.
-     */
-template,
-[hidden] {
-  display: none; }
-
-/* Links
-       ========================================================================== */
-/**
-     * 1. Remove the gray background on active links in IE 10.
-     * 2. Remove gaps in links underline in iOS 8+ and Safari 8+.
-     */
-a {
-  background-color: transparent;
-  /* 1 */
-  -webkit-text-decoration-skip: objects;
-  /* 2 */ }
-
-/**
-     * Remove the outline on focused links when they are also active or hovered
-     * in all browsers (opinionated).
-     */
-a:active,
-a:hover {
-  outline-width: 0; }
-
-/* Text-level semantics
-       ========================================================================== */
-/**
-     * 1. Remove the bottom border in Firefox <40.
-     * 2. Add the correct text decoration in Chrome, Edge, IE, Opera, and Safari.
-     */
-abbr[title] {
-  border-bottom: none;
-  /* 1 */
-  text-decoration: underline;
-  /* 2 */
-  text-decoration: underline dotted;
-  /* 2 */ }
-
-/**
-     * Prevent the duplicate application of `bolder` by the next rule in Safari 6.
-     */
-b,
-strong {
-  font-weight: inherit; }
-
-/**
-     * Add the correct font weight in Chrome, Edge, and Safari.
-     */
-b,
-strong {
-  font-weight: bolder; }
-
-/**
-     * 1. Correct the inheritance and scaling of font size in all browsers.
-     * 2. Correct the odd `em` font sizing in all browsers.
-     */
-code,
-kbd,
-samp {
-  font-family: monospace, monospace;
-  font-size: 1em; }
-
-/**
-     * Add the correct font style in Android <4.4.
-     */
-dfn {
-  font-style: italic; }
-
-/**
-     * Correct the font size and margin on `h1` elements within `section` and
-     * `article` contexts in Chrome, Firefox, and Safari.
-     */
-h1 {
-  font-size: 2em;
-  /* Set 1 unit of vertical rhythm on the top and bottom margins. */
-  margin: 0.75em 0; }
-
-/**
-     * Add the correct background and color in IE <10.
-     */
-mark {
-  background-color: #ff0;
-  color: #000; }
-
-/**
-     * Add the correct font size in all browsers.
-     */
-small {
-  font-size: 80%; }
-
-/**
-     * Prevent `sub` and `sup` elements from affecting the line height in
-     * all browsers.
-     */
-sub,
-sup {
-  font-size: 75%;
-  line-height: 0;
-  position: relative;
-  vertical-align: baseline; }
-
-sub {
-  bottom: -0.25em; }
-
-sup {
-  top: -0.5em; }
-
-/* Embedded content
-       ========================================================================== */
-/**
-     * Remove the border on images inside links in IE <11.
-     */
-img {
-  border-style: none; }
-
-/**
-     * Hide the overflow in IE.
-     */
-svg:not(:root) {
-  overflow: hidden; }
-
-/* Grouping content
-       ========================================================================== */
-/**
-     * Add the correct margin in IE 8.
-     */
-figure {
-  margin: 1.5em 40px; }
-
-/**
-     * 1. Add the correct box sizing in Firefox.
-     * 2. Show the overflow in Edge and IE.
-     */
-hr {
-  box-sizing: content-box;
-  /* 1 */
-  height: 0;
-  /* 1 */
-  overflow: visible;
-  /* 2 */ }
-
-pre {
-  font-family: monospace, monospace;
-  font-size: 1em; }
-
-/* Forms
-       ========================================================================== */
-/**
-     * Known issues:
-     * - By default, Chrome on OS X and Safari on OS X allow very limited styling of
-     *   select, unless a border property is set. The default font weight on
-     *   optgroup elements cannot safely be changed in Chrome on OSX and Safari on
-     *   OS X.
-     * - It is recommended that you do not style checkbox and radio inputs as
-     *   Firefox's implementation does not respect box-sizing, padding, or width.
-     * - Certain font size values applied to number inputs cause the cursor style of
-     *   the decrement button to change from default to text.
-     * - The search input is not fully stylable by default. In Chrome and Safari on
-     *   OSX/iOS you can't control font, padding, border, or background. In Chrome
-     *   and Safari on Windows you can't control border properly. It will apply
-     *   border-width but will only show a border color (which cannot be controlled)
-     *   for the outer 1px of that border. Applying -webkit-appearance: textfield
-     *   addresses these issues without removing the benefits of search inputs (e.g.
-     *   showing past searches). Safari (but not Chrome) will clip the cancel button
-     *   on when it has padding (and textfield appearance).
-     */
-/**
-     * 1. Change font properties to `inherit` in all browsers (opinionated).
-     * 2. Remove the margin in Firefox and Safari.
-     * 3. Address `font-family` inconsistency between `textarea` and other form in IE 7
-     * 4. Improve appearance and consistency with IE 6/7.
-     */
-button,
-input,
-optgroup,
-select,
-textarea {
-  font: inherit;
-  /* 1 */
-  margin: 0;
-  /* 2 */ }
-
-/**
-     * Show the overflow in IE.
-     */
-button {
-  overflow: visible; }
-
-/**
-     * Remove the inheritance of text transform in Edge, Firefox, and IE.
-     * 1. Remove the inheritance of text transform in Firefox.
-     */
-button,
-select {
-  /* 1 */
-  text-transform: none; }
-
-/**
-     * 1. Prevent a WebKit bug where (2) destroys native `audio` and `video`
-     *    controls in Android 4.
-     * 2. Correct the inability to style clickable types in iOS and Safari.
-     */
-button,
-html [type="button"],
-[type="reset"],
-[type="submit"] {
-  -webkit-appearance: button;
-  /* 2 */ }
-
-button,
-[type="button"],
-[type="reset"],
-[type="submit"] {
-  /**
-       * Remove the inner border and padding in Firefox.
-       */
-  /**
-       * Restore the focus styles unset by the previous rule.
-       */ }
-  button::-moz-focus-inner,
-  [type="button"]::-moz-focus-inner,
-  [type="reset"]::-moz-focus-inner,
-  [type="submit"]::-moz-focus-inner {
-    border-style: none;
-    padding: 0; }
-  button:-moz-focusring,
-  [type="button"]:-moz-focusring,
-  [type="reset"]:-moz-focusring,
-  [type="submit"]:-moz-focusring {
-    outline: 1px dotted ButtonText; }
-
-/**
-     * Show the overflow in Edge.
-     */
-input {
-  overflow: visible; }
-
-/**
-     * 1. Add the correct box sizing in IE <11.
-     * 2. Remove the padding in IE <11.
-     * 3. Remove excess padding in IE 7.
-     *    Known issue: excess padding remains in IE 6.
-     */
-[type="checkbox"],
-[type="radio"] {
-  box-sizing: border-box;
-  /* 1 */
-  padding: 0;
-  /* 2 */ }
-
-/**
-     * Correct the cursor style of increment and decrement buttons in Chrome.
-     */
-[type="number"]::-webkit-inner-spin-button,
-[type="number"]::-webkit-outer-spin-button {
-  height: auto; }
-
-/**
-     * 1. Correct the odd appearance in Chrome and Safari.
-     * 2. Correct the outline style in Safari.
-     */
-[type="search"] {
-  -webkit-appearance: textfield;
-  /* 1 */
-  outline-offset: -2px;
-  /* 2 */
-  /**
-       * Remove the inner padding and cancel buttons in Chrome and Safari on OS X.
-       */ }
-  [type="search"]::-webkit-search-cancel-button, [type="search"]::-webkit-search-decoration {
-    -webkit-appearance: none; }
-
-/**
-     * Correct the text style of placeholders in Chrome, Edge, and Safari.
-     */
-::-webkit-input-placeholder {
-  color: inherit;
-  opacity: 0.54; }
-
-/**
-     * 1. Correct the inability to style clickable types in iOS and Safari.
-     * 2. Change font properties to `inherit` in Safari.
-     */
-::-webkit-file-upload-button {
-  -webkit-appearance: button;
-  /* 1 */
-  font: inherit;
-  /* 2 */ }
-
-/**
-     * Change the border, margin, and padding in all browsers (opinionated).
-     */
-fieldset {
-  border: 1px solid #c0c0c0;
-  margin: 0 2px;
-  padding: 0.35em 0.625em 0.75em; }
-
-/**
-     * 1. Correct the text wrapping in Edge and IE.
-     * 2. Correct the color inheritance from `fieldset` elements in IE.
-     * 3. Remove the padding so developers are not caught out when they zero out
-     *    `fieldset` elements in all browsers.
-     * 4. Correct alignment displayed oddly in IE 6/7.
-     */
-legend {
-  box-sizing: border-box;
-  /* 1 */
-  display: table;
-  /* 1 */
-  max-width: 100%;
-  /* 1 */
-  white-space: normal;
-  /* 1 */
-  color: inherit;
-  /* 2 */
-  padding: 0;
-  /* 3 */ }
-
-/**
-     * Restore the font weight unset by a previous rule.
-     */
-optgroup {
-  font-weight: bold; }
-
-/**
-     * Remove the default vertical scrollbar in IE.
-     */
-textarea {
-  overflow: auto; }
diff --git a/test/fixtures/variables/support-for/negative-value/input.scss b/test/fixtures/variables/support-for/negative-value/input.scss
deleted file mode 100644
index 36a9e56..0000000
--- a/test/fixtures/variables/support-for/negative-value/input.scss
+++ /dev/null
@@ -1,6 +0,0 @@
-$support-for: (
-  ie: -2,
-);
-
-@import 'normalize';
-@include normalize();
diff --git a/test/fixtures/variables/support-for/negative-value/output.css b/test/fixtures/variables/support-for/negative-value/output.css
deleted file mode 100644
index 0f75d8a..0000000
--- a/test/fixtures/variables/support-for/negative-value/output.css
+++ /dev/null
@@ -1,395 +0,0 @@
-/*! normalize-scss | MIT/GPLv2 License | bit.ly/normalize-scss */
-/**
-     * 1. Change the default font family in all browsers (opinionated).
-     * 2. Prevent adjustments of font size after orientation changes in IE and iOS.
-     */
-html {
-  font-family: sans-serif;
-  /* 1 */
-  -ms-text-size-adjust: 100%;
-  /* 2 */
-  -webkit-text-size-adjust: 100%;
-  /* 2 */ }
-
-/**
-     * Remove the margin in all browsers (opinionated).
-     */
-body {
-  margin: 0; }
-
-/* HTML5 display definitions
-       ========================================================================== */
-/**
-     * Add the correct display in IE <10.
-     * Add the correct display in Edge, IE, and Firefox for `details` or `summary`.
-     * Add the correct display in IE for `main`.
-     */
-article,
-aside,
-details,
-figcaption,
-figure,
-footer,
-header,
-main,
-menu,
-nav,
-section,
-summary {
-  display: block; }
-
-/**
-     * Add the correct display in IE <10.
-     */
-audio,
-canvas,
-progress,
-video {
-  display: inline-block; }
-
-/**
-     * Add the correct display and remove excess height in iOS 4-7.
-     */
-audio:not([controls]) {
-  display: none;
-  height: 0; }
-
-/**
-     * Add the correct vertical alignment in Chrome, Firefox, and Opera.
-     */
-progress {
-  vertical-align: baseline; }
-
-/**
-     * Add the correct display in IE <11, Safari <8, and Firefox <22.
-     * 1. Add the correct display in IE.
-     */
-template,
-[hidden] {
-  display: none; }
-
-/* Links
-       ========================================================================== */
-/**
-     * 1. Remove the gray background on active links in IE 10.
-     * 2. Remove gaps in links underline in iOS 8+ and Safari 8+.
-     */
-a {
-  background-color: transparent;
-  /* 1 */
-  -webkit-text-decoration-skip: objects;
-  /* 2 */ }
-
-/**
-     * Remove the outline on focused links when they are also active or hovered
-     * in all browsers (opinionated).
-     */
-a:active,
-a:hover {
-  outline-width: 0; }
-
-/* Text-level semantics
-       ========================================================================== */
-/**
-     * 1. Remove the bottom border in Firefox <40.
-     * 2. Add the correct text decoration in Chrome, Edge, IE, Opera, and Safari.
-     */
-abbr[title] {
-  border-bottom: none;
-  /* 1 */
-  text-decoration: underline;
-  /* 2 */
-  text-decoration: underline dotted;
-  /* 2 */ }
-
-/**
-     * Prevent the duplicate application of `bolder` by the next rule in Safari 6.
-     */
-b,
-strong {
-  font-weight: inherit; }
-
-/**
-     * Add the correct font weight in Chrome, Edge, and Safari.
-     */
-b,
-strong {
-  font-weight: bolder; }
-
-/**
-     * 1. Correct the inheritance and scaling of font size in all browsers.
-     * 2. Correct the odd `em` font sizing in all browsers.
-     */
-code,
-kbd,
-samp {
-  font-family: monospace, monospace;
-  font-size: 1em; }
-
-/**
-     * Add the correct font style in Android <4.4.
-     */
-dfn {
-  font-style: italic; }
-
-/**
-     * Correct the font size and margin on `h1` elements within `section` and
-     * `article` contexts in Chrome, Firefox, and Safari.
-     */
-h1 {
-  font-size: 2em;
-  /* Set 1 unit of vertical rhythm on the top and bottom margins. */
-  margin: 0.75em 0; }
-
-/**
-     * Add the correct background and color in IE <10.
-     */
-mark {
-  background-color: #ff0;
-  color: #000; }
-
-/**
-     * Add the correct font size in all browsers.
-     */
-small {
-  font-size: 80%; }
-
-/**
-     * Prevent `sub` and `sup` elements from affecting the line height in
-     * all browsers.
-     */
-sub,
-sup {
-  font-size: 75%;
-  line-height: 0;
-  position: relative;
-  vertical-align: baseline; }
-
-sub {
-  bottom: -0.25em; }
-
-sup {
-  top: -0.5em; }
-
-/* Embedded content
-       ========================================================================== */
-/**
-     * Remove the border on images inside links in IE <11.
-     */
-img {
-  border-style: none; }
-
-/**
-     * Hide the overflow in IE.
-     */
-svg:not(:root) {
-  overflow: hidden; }
-
-/* Grouping content
-       ========================================================================== */
-/**
-     * Add the correct margin in IE 8.
-     */
-figure {
-  margin: 1.5em 40px; }
-
-/**
-     * 1. Add the correct box sizing in Firefox.
-     * 2. Show the overflow in Edge and IE.
-     */
-hr {
-  box-sizing: content-box;
-  /* 1 */
-  height: 0;
-  /* 1 */
-  overflow: visible;
-  /* 2 */ }
-
-pre {
-  font-family: monospace, monospace;
-  font-size: 1em; }
-
-/* Forms
-       ========================================================================== */
-/**
-     * Known issues:
-     * - By default, Chrome on OS X and Safari on OS X allow very limited styling of
-     *   select, unless a border property is set. The default font weight on
-     *   optgroup elements cannot safely be changed in Chrome on OSX and Safari on
-     *   OS X.
-     * - It is recommended that you do not style checkbox and radio inputs as
-     *   Firefox's implementation does not respect box-sizing, padding, or width.
-     * - Certain font size values applied to number inputs cause the cursor style of
-     *   the decrement button to change from default to text.
-     * - The search input is not fully stylable by default. In Chrome and Safari on
-     *   OSX/iOS you can't control font, padding, border, or background. In Chrome
-     *   and Safari on Windows you can't control border properly. It will apply
-     *   border-width but will only show a border color (which cannot be controlled)
-     *   for the outer 1px of that border. Applying -webkit-appearance: textfield
-     *   addresses these issues without removing the benefits of search inputs (e.g.
-     *   showing past searches). Safari (but not Chrome) will clip the cancel button
-     *   on when it has padding (and textfield appearance).
-     */
-/**
-     * 1. Change font properties to `inherit` in all browsers (opinionated).
-     * 2. Remove the margin in Firefox and Safari.
-     * 3. Address `font-family` inconsistency between `textarea` and other form in IE 7
-     * 4. Improve appearance and consistency with IE 6/7.
-     */
-button,
-input,
-optgroup,
-select,
-textarea {
-  font: inherit;
-  /* 1 */
-  margin: 0;
-  /* 2 */ }
-
-/**
-     * Show the overflow in IE.
-     */
-button {
-  overflow: visible; }
-
-/**
-     * Remove the inheritance of text transform in Edge, Firefox, and IE.
-     * 1. Remove the inheritance of text transform in Firefox.
-     */
-button,
-select {
-  /* 1 */
-  text-transform: none; }
-
-/**
-     * 1. Prevent a WebKit bug where (2) destroys native `audio` and `video`
-     *    controls in Android 4.
-     * 2. Correct the inability to style clickable types in iOS and Safari.
-     */
-button,
-html [type="button"],
-[type="reset"],
-[type="submit"] {
-  -webkit-appearance: button;
-  /* 2 */ }
-
-button,
-[type="button"],
-[type="reset"],
-[type="submit"] {
-  /**
-       * Remove the inner border and padding in Firefox.
-       */
-  /**
-       * Restore the focus styles unset by the previous rule.
-       */ }
-  button::-moz-focus-inner,
-  [type="button"]::-moz-focus-inner,
-  [type="reset"]::-moz-focus-inner,
-  [type="submit"]::-moz-focus-inner {
-    border-style: none;
-    padding: 0; }
-  button:-moz-focusring,
-  [type="button"]:-moz-focusring,
-  [type="reset"]:-moz-focusring,
-  [type="submit"]:-moz-focusring {
-    outline: 1px dotted ButtonText; }
-
-/**
-     * Show the overflow in Edge.
-     */
-input {
-  overflow: visible; }
-
-/**
-     * 1. Add the correct box sizing in IE <11.
-     * 2. Remove the padding in IE <11.
-     * 3. Remove excess padding in IE 7.
-     *    Known issue: excess padding remains in IE 6.
-     */
-[type="checkbox"],
-[type="radio"] {
-  box-sizing: border-box;
-  /* 1 */
-  padding: 0;
-  /* 2 */ }
-
-/**
-     * Correct the cursor style of increment and decrement buttons in Chrome.
-     */
-[type="number"]::-webkit-inner-spin-button,
-[type="number"]::-webkit-outer-spin-button {
-  height: auto; }
-
-/**
-     * 1. Correct the odd appearance in Chrome and Safari.
-     * 2. Correct the outline style in Safari.
-     */
-[type="search"] {
-  -webkit-appearance: textfield;
-  /* 1 */
-  outline-offset: -2px;
-  /* 2 */
-  /**
-       * Remove the inner padding and cancel buttons in Chrome and Safari on OS X.
-       */ }
-  [type="search"]::-webkit-search-cancel-button, [type="search"]::-webkit-search-decoration {
-    -webkit-appearance: none; }
-
-/**
-     * Correct the text style of placeholders in Chrome, Edge, and Safari.
-     */
-::-webkit-input-placeholder {
-  color: inherit;
-  opacity: 0.54; }
-
-/**
-     * 1. Correct the inability to style clickable types in iOS and Safari.
-     * 2. Change font properties to `inherit` in Safari.
-     */
-::-webkit-file-upload-button {
-  -webkit-appearance: button;
-  /* 1 */
-  font: inherit;
-  /* 2 */ }
-
-/**
-     * Change the border, margin, and padding in all browsers (opinionated).
-     */
-fieldset {
-  border: 1px solid #c0c0c0;
-  margin: 0 2px;
-  padding: 0.35em 0.625em 0.75em; }
-
-/**
-     * 1. Correct the text wrapping in Edge and IE.
-     * 2. Correct the color inheritance from `fieldset` elements in IE.
-     * 3. Remove the padding so developers are not caught out when they zero out
-     *    `fieldset` elements in all browsers.
-     * 4. Correct alignment displayed oddly in IE 6/7.
-     */
-legend {
-  box-sizing: border-box;
-  /* 1 */
-  display: table;
-  /* 1 */
-  max-width: 100%;
-  /* 1 */
-  white-space: normal;
-  /* 1 */
-  color: inherit;
-  /* 2 */
-  padding: 0;
-  /* 3 */ }
-
-/**
-     * Restore the font weight unset by a previous rule.
-     */
-optgroup {
-  font-weight: bold; }
-
-/**
-     * Remove the default vertical scrollbar in IE.
-     */
-textarea {
-  overflow: auto; }
diff --git a/test/test_fork-versions.js b/test/test_fork-versions.js
index ada71f8..1b19898 100644
--- a/test/test_fork-versions.js
+++ b/test/test_fork-versions.js
@@ -7,9 +7,7 @@ describe('Fork versions', function() {
         fixtures: path.join(__dirname, 'fixtures/fork-versions'),
         includePaths: [
           // Path to Fork version.
-          path.join(__dirname, '../fork-versions/default'),
-          // Path to normalize-scss' dependencies.
-          path.dirname(require.resolve('support-for'))
+          path.join(__dirname, '../fork-versions/default')
         ]
       });
       return sassyTest.renderFixture('default');
@@ -22,9 +20,7 @@ describe('Fork versions', function() {
         fixtures: path.join(__dirname, 'fixtures'),
         includePaths: [
           // Path to Fork version.
-          path.join(__dirname, '../fork-versions/ruby-sass-compass'),
-          // Path to normalize-scss' dependencies.
-          path.dirname(require.resolve('support-for'))
+          path.join(__dirname, '../fork-versions/ruby-sass-compass')
         ]
       });
       return sassyTest.renderFixture('fork-versions/ruby-sass-compass');
@@ -39,7 +35,6 @@ describe('Fork versions', function() {
           // Path to Fork version.
           path.join(__dirname, '../fork-versions/typey'),
           // Path to normalize-scss' dependencies.
-          path.dirname(require.resolve('support-for')),
           path.dirname(require.resolve('typey'))
         ]
       });
@@ -56,7 +51,6 @@ describe('Fork versions', function() {
           path.join(__dirname, '../fork-versions/typey-chroma-kss'),
           // Path to normalize-scss' dependencies.
           path.dirname(require.resolve('chroma-sass')),
-          path.dirname(require.resolve('support-for')),
           path.dirname(require.resolve('typey'))
         ]
       });
diff --git a/test/test_variables.js b/test/test_variables.js
index 00210f4..7102e21 100644
--- a/test/test_variables.js
+++ b/test/test_variables.js
@@ -28,38 +28,4 @@ describe('Configuration variables', function() {
       return sassyTest.renderFixture('variables/indent-amount');
     });
   });
-
-  describe('$support-for', function() {
-    it('should support Firefox 29', function() {
-      return sassyTest.renderFixture('variables/support-for/firefox29');
-    });
-
-    it('should support IE 6', function() {
-      return sassyTest.renderFixture('variables/support-for/ie6');
-    });
-
-    it('should support IE 7', function() {
-      return sassyTest.renderFixture('variables/support-for/ie7');
-    });
-
-    it('should support IE 8', function() {
-      return sassyTest.renderFixture('variables/support-for/ie8');
-    });
-
-    it('should support IE 9', function() {
-      return sassyTest.renderFixture('variables/support-for/ie9');
-    });
-
-    it('should support IE 10', function() {
-      return sassyTest.renderFixture('variables/support-for/ie10');
-    });
-
-    it('should support IE 11', function() {
-      return sassyTest.renderFixture('variables/support-for/ie11');
-    });
-
-    it('should support "last X versions" with -X value', function() {
-      return sassyTest.renderFixture('variables/support-for/negative-value');
-    });
-  });
 });