Merge branch 'bc/hash-independent-tests-part-7'

Preparation of test scripts for the day when the object names will
use SHA-256 continues.

* bc/hash-independent-tests-part-7:
  t5604: make hash independent
  t5601: switch into repository to hash object
  t5562: use $ZERO_OID
  t5540: make hash size independent
  t5537: make hash size independent
  t5530: compute results based on object length
  t5512: abstract away SHA-1-specific constants
  t5510: make hash size independent
  t5504: make hash algorithm independent
  t5324: make hash size independent
  t5319: make test work with SHA-256
  t5319: change invalid offset for SHA-256 compatibility
  t5318: update for SHA-256
  t4300: abstract away SHA-1-specific constants
  t4204: make hash size independent
  t4202: abstract away SHA-1-specific constants
  t4200: make hash size independent
  t4134: compute appropriate length constant
  t4066: compute index line in diffs
  t4054: make hash-size independent

19 files changed, 254 insertions, 219 deletions

diff --git a/t/t4054-diff-bogus-tree.sh b/t/t4054-diff-bogus-tree.sh
index fcae82fffa..8c95f152b2 100755
--- a/t/t4054-diff-bogus-tree.sh
+++ b/t/t4054-diff-bogus-tree.sh
@@ -4,8 +4,9 @@ test_description='test diff with a bogus tree containing the null sha1'
 . ./test-lib.sh
 
 test_expect_success 'create bogus tree' '
+	name=$(echo $ZERO_OID | sed -e "s/00/Q/g") &&
 	bogus_tree=$(
-		printf "100644 fooQQQQQQQQQQQQQQQQQQQQQ" |
+		printf "100644 fooQ$name" |
 		q_to_nul |
 		git hash-object -w --stdin -t tree
 	)
diff --git a/t/t4066-diff-emit-delay.sh b/t/t4066-diff-emit-delay.sh
index 5df6b5e64e..6331f63b12 100755
--- a/t/t4066-diff-emit-delay.sh
+++ b/t/t4066-diff-emit-delay.sh
@@ -18,7 +18,7 @@ test_expect_success 'set up history with a merge' '
 '
 
 test_expect_success 'log --cc -p --stat --color-moved' '
-	cat >expect <<-\EOF &&
+	cat >expect <<-EOF &&
 	commit D
 	---
 	 D.t | 1 +
@@ -26,7 +26,7 @@ test_expect_success 'log --cc -p --stat --color-moved' '
 
 	diff --git a/D.t b/D.t
 	new file mode 100644
-	index 0000000..1784810
+	index 0000000..$(git rev-parse --short D:D.t)
 	--- /dev/null
 	+++ b/D.t
 	@@ -0,0 +1 @@
@@ -42,7 +42,7 @@ test_expect_success 'log --cc -p --stat --color-moved' '
 
 	diff --git a/C.t b/C.t
 	new file mode 100644
-	index 0000000..3cc58df
+	index 0000000..$(git rev-parse --short C:C.t)
 	--- /dev/null
 	+++ b/C.t
 	@@ -0,0 +1 @@
@@ -54,7 +54,7 @@ test_expect_success 'log --cc -p --stat --color-moved' '
 
 	diff --git a/B.t b/B.t
 	new file mode 100644
-	index 0000000..223b783
+	index 0000000..$(git rev-parse --short B:B.t)
 	--- /dev/null
 	+++ b/B.t
 	@@ -0,0 +1 @@
@@ -66,7 +66,7 @@ test_expect_success 'log --cc -p --stat --color-moved' '
 
 	diff --git a/A.t b/A.t
 	new file mode 100644
-	index 0000000..f70f10e
+	index 0000000..$(git rev-parse --short A:A.t)
 	--- /dev/null
 	+++ b/A.t
 	@@ -0,0 +1 @@
diff --git a/t/t4134-apply-submodule.sh b/t/t4134-apply-submodule.sh
index 0043930ca6..99ed4cc546 100755
--- a/t/t4134-apply-submodule.sh
+++ b/t/t4134-apply-submodule.sh
@@ -8,6 +8,7 @@ test_description='git apply submodule tests'
 . ./test-lib.sh
 
 test_expect_success setup '
+	test_oid_init &&
 	cat > create-sm.patch <<EOF &&
 diff --git a/dir/sm b/dir/sm
 new file mode 160000
@@ -15,7 +16,7 @@ index 0000000..0123456
 --- /dev/null
 +++ b/dir/sm
 @@ -0,0 +1 @@
-+Subproject commit 0123456789abcdef0123456789abcdef01234567
++Subproject commit $(test_oid numeric)
 EOF
 	cat > remove-sm.patch <<EOF
 diff --git a/dir/sm b/dir/sm
@@ -24,7 +25,7 @@ index 0123456..0000000
 --- a/dir/sm
 +++ /dev/null
 @@ -1 +0,0 @@
--Subproject commit 0123456789abcdef0123456789abcdef01234567
+-Subproject commit $(test_oid numeric)
 EOF
 '
 
diff --git a/t/t4200-rerere.sh b/t/t4200-rerere.sh
index 55b7750ade..831d424c47 100755
--- a/t/t4200-rerere.sh
+++ b/t/t4200-rerere.sh
@@ -25,6 +25,7 @@ test_description='git rerere
 . ./test-lib.sh
 
 test_expect_success 'setup' '
+	test_oid_init &&
 	cat >a1 <<-\EOF &&
 	Some title
 	==========
@@ -210,7 +211,7 @@ test_expect_success 'set up for garbage collection tests' '
 	echo Hello >$rr/preimage &&
 	echo World >$rr/postimage &&
 
-	sha2=4000000000000000000000000000000000000000 &&
+	sha2=$(test_oid deadbeef) &&
 	rr2=.git/rr-cache/$sha2 &&
 	mkdir $rr2 &&
 	echo Hello >$rr2/preimage &&
diff --git a/t/t4202-log.sh b/t/t4202-log.sh
index 2c9489484a..192347a3e1 100755
--- a/t/t4202-log.sh
+++ b/t/t4202-log.sh
@@ -87,12 +87,12 @@ test_expect_success 'format %w(,1,2)' '
 '
 
 cat > expect << EOF
-804a787 sixth
-394ef78 fifth
-5d31159 fourth
-2fbe8c0 third
-f7dab8e second
-3a2fdcb initial
+$(git rev-parse --short :/sixth  ) sixth
+$(git rev-parse --short :/fifth  ) fifth
+$(git rev-parse --short :/fourth ) fourth
+$(git rev-parse --short :/third  ) third
+$(git rev-parse --short :/second ) second
+$(git rev-parse --short :/initial) initial
 EOF
 test_expect_success 'oneline' '
 
@@ -173,43 +173,45 @@ test_expect_success 'git config log.follow is overridden by --no-follow' '
 	verbose test "$actual" = "$expect"
 '
 
+# Note that these commits are intentionally listed out of order.
+last_three="$(git rev-parse :/fourth :/sixth :/fifth)"
 cat > expect << EOF
-804a787 sixth
-394ef78 fifth
-5d31159 fourth
+$(git rev-parse --short :/sixth ) sixth
+$(git rev-parse --short :/fifth ) fifth
+$(git rev-parse --short :/fourth) fourth
 EOF
 test_expect_success 'git log --no-walk <commits> sorts by commit time' '
-	git log --no-walk --oneline 5d31159 804a787 394ef78 > actual &&
+	git log --no-walk --oneline $last_three > actual &&
 	test_cmp expect actual
 '
 
 test_expect_success 'git log --no-walk=sorted <commits> sorts by commit time' '
-	git log --no-walk=sorted --oneline 5d31159 804a787 394ef78 > actual &&
+	git log --no-walk=sorted --oneline $last_three > actual &&
 	test_cmp expect actual
 '
 
 cat > expect << EOF
-=== 804a787 sixth
-=== 394ef78 fifth
-=== 5d31159 fourth
+=== $(git rev-parse --short :/sixth ) sixth
+=== $(git rev-parse --short :/fifth ) fifth
+=== $(git rev-parse --short :/fourth) fourth
 EOF
 test_expect_success 'git log --line-prefix="=== " --no-walk <commits> sorts by commit time' '
-	git log --line-prefix="=== " --no-walk --oneline 5d31159 804a787 394ef78 > actual &&
+	git log --line-prefix="=== " --no-walk --oneline $last_three > actual &&
 	test_cmp expect actual
 '
 
 cat > expect << EOF
-5d31159 fourth
-804a787 sixth
-394ef78 fifth
+$(git rev-parse --short :/fourth) fourth
+$(git rev-parse --short :/sixth ) sixth
+$(git rev-parse --short :/fifth ) fifth
 EOF
 test_expect_success 'git log --no-walk=unsorted <commits> leaves list of commits as given' '
-	git log --no-walk=unsorted --oneline 5d31159 804a787 394ef78 > actual &&
+	git log --no-walk=unsorted --oneline $last_three > actual &&
 	test_cmp expect actual
 '
 
 test_expect_success 'git show <commits> leaves list of commits as given' '
-	git show --oneline -s 5d31159 804a787 394ef78 > actual &&
+	git show --oneline -s $last_three > actual &&
 	test_cmp expect actual
 '
 
@@ -957,7 +959,7 @@ cat >expect <<\EOF
 | |
 | | diff --git a/reach.t b/reach.t
 | | new file mode 100644
-| | index 0000000..10c9591
+| | index BEFORE..AFTER
 | | --- /dev/null
 | | +++ b/reach.t
 | | @@ -0,0 +1 @@
@@ -980,7 +982,7 @@ cat >expect <<\EOF
 | | |
 | | |   diff --git a/octopus-b.t b/octopus-b.t
 | | |   new file mode 100644
-| | |   index 0000000..d5fcad0
+| | |   index BEFORE..AFTER
 | | |   --- /dev/null
 | | |   +++ b/octopus-b.t
 | | |   @@ -0,0 +1 @@
@@ -996,7 +998,7 @@ cat >expect <<\EOF
 | |
 | |   diff --git a/octopus-a.t b/octopus-a.t
 | |   new file mode 100644
-| |   index 0000000..11ee015
+| |   index BEFORE..AFTER
 | |   --- /dev/null
 | |   +++ b/octopus-a.t
 | |   @@ -0,0 +1 @@
@@ -1012,7 +1014,7 @@ cat >expect <<\EOF
 |
 |   diff --git a/seventh.t b/seventh.t
 |   new file mode 100644
-|   index 0000000..9744ffc
+|   index BEFORE..AFTER
 |   --- /dev/null
 |   +++ b/seventh.t
 |   @@ -0,0 +1 @@
@@ -1046,7 +1048,7 @@ cat >expect <<\EOF
 | | | |
 | | | | diff --git a/tangle-a b/tangle-a
 | | | | new file mode 100644
-| | | | index 0000000..7898192
+| | | | index BEFORE..AFTER
 | | | | --- /dev/null
 | | | | +++ b/tangle-a
 | | | | @@ -0,0 +1 @@
@@ -1068,7 +1070,7 @@ cat >expect <<\EOF
 | | | |
 | | | |   diff --git a/2 b/2
 | | | |   new file mode 100644
-| | | |   index 0000000..0cfbf08
+| | | |   index BEFORE..AFTER
 | | | |   --- /dev/null
 | | | |   +++ b/2
 | | | |   @@ -0,0 +1 @@
@@ -1084,7 +1086,7 @@ cat >expect <<\EOF
 | | | |
 | | | | diff --git a/1 b/1
 | | | | new file mode 100644
-| | | | index 0000000..d00491f
+| | | | index BEFORE..AFTER
 | | | | --- /dev/null
 | | | | +++ b/1
 | | | | @@ -0,0 +1 @@
@@ -1100,7 +1102,7 @@ cat >expect <<\EOF
 | | | |
 | | | | diff --git a/one b/one
 | | | | new file mode 100644
-| | | | index 0000000..9a33383
+| | | | index BEFORE..AFTER
 | | | | --- /dev/null
 | | | | +++ b/one
 | | | | @@ -0,0 +1 @@
@@ -1116,7 +1118,7 @@ cat >expect <<\EOF
 | | |
 | | |   diff --git a/a/two b/a/two
 | | |   deleted file mode 100644
-| | |   index 9245af5..0000000
+| | |   index BEFORE..AFTER
 | | |   --- a/a/two
 | | |   +++ /dev/null
 | | |   @@ -1 +0,0 @@
@@ -1132,7 +1134,7 @@ cat >expect <<\EOF
 | | |
 | | | diff --git a/a/two b/a/two
 | | | new file mode 100644
-| | | index 0000000..9245af5
+| | | index BEFORE..AFTER
 | | | --- /dev/null
 | | | +++ b/a/two
 | | | @@ -0,0 +1 @@
@@ -1148,7 +1150,7 @@ cat >expect <<\EOF
 | |
 | |   diff --git a/ein b/ein
 | |   new file mode 100644
-| |   index 0000000..9d7e69f
+| |   index BEFORE..AFTER
 | |   --- /dev/null
 | |   +++ b/ein
 | |   @@ -0,0 +1 @@
@@ -1165,14 +1167,14 @@ cat >expect <<\EOF
 |
 |   diff --git a/ichi b/ichi
 |   new file mode 100644
-|   index 0000000..9d7e69f
+|   index BEFORE..AFTER
 |   --- /dev/null
 |   +++ b/ichi
 |   @@ -0,0 +1 @@
 |   +ichi
 |   diff --git a/one b/one
 |   deleted file mode 100644
-|   index 9d7e69f..0000000
+|   index BEFORE..AFTER
 |   --- a/one
 |   +++ /dev/null
 |   @@ -1 +0,0 @@
@@ -1187,7 +1189,7 @@ cat >expect <<\EOF
 |  1 file changed, 1 insertion(+), 1 deletion(-)
 |
 | diff --git a/one b/one
-| index 5626abf..9d7e69f 100644
+| index BEFORE..AFTER 100644
 | --- a/one
 | +++ b/one
 | @@ -1 +1 @@
@@ -1204,7 +1206,7 @@ cat >expect <<\EOF
 
   diff --git a/one b/one
   new file mode 100644
-  index 0000000..5626abf
+  index BEFORE..AFTER
   --- /dev/null
   +++ b/one
   @@ -0,0 +1 @@
@@ -1221,7 +1223,8 @@ sanitize_output () {
 	    -e 's/, 0 insertions(+)//' \
 	    -e 's/ 1 files changed, / 1 file changed, /' \
 	    -e 's/, 1 deletions(-)/, 1 deletion(-)/' \
-	    -e 's/, 1 insertions(+)/, 1 insertion(+)/'
+	    -e 's/, 1 insertions(+)/, 1 insertion(+)/' \
+	    -e 's/index [0-9a-f]*\.\.[0-9a-f]*/index BEFORE..AFTER/'
 }
 
 test_expect_success 'log --graph with diff and stats' '
@@ -1247,7 +1250,7 @@ cat >expect <<\EOF
 *** | |
 *** | | diff --git a/reach.t b/reach.t
 *** | | new file mode 100644
-*** | | index 0000000..10c9591
+*** | | index BEFORE..AFTER
 *** | | --- /dev/null
 *** | | +++ b/reach.t
 *** | | @@ -0,0 +1 @@
@@ -1270,7 +1273,7 @@ cat >expect <<\EOF
 *** | | |
 *** | | |   diff --git a/octopus-b.t b/octopus-b.t
 *** | | |   new file mode 100644
-*** | | |   index 0000000..d5fcad0
+*** | | |   index BEFORE..AFTER
 *** | | |   --- /dev/null
 *** | | |   +++ b/octopus-b.t
 *** | | |   @@ -0,0 +1 @@
@@ -1286,7 +1289,7 @@ cat >expect <<\EOF
 *** | |
 *** | |   diff --git a/octopus-a.t b/octopus-a.t
 *** | |   new file mode 100644
-*** | |   index 0000000..11ee015
+*** | |   index BEFORE..AFTER
 *** | |   --- /dev/null
 *** | |   +++ b/octopus-a.t
 *** | |   @@ -0,0 +1 @@
@@ -1302,7 +1305,7 @@ cat >expect <<\EOF
 *** |
 *** |   diff --git a/seventh.t b/seventh.t
 *** |   new file mode 100644
-*** |   index 0000000..9744ffc
+*** |   index BEFORE..AFTER
 *** |   --- /dev/null
 *** |   +++ b/seventh.t
 *** |   @@ -0,0 +1 @@
@@ -1336,7 +1339,7 @@ cat >expect <<\EOF
 *** | | | |
 *** | | | | diff --git a/tangle-a b/tangle-a
 *** | | | | new file mode 100644
-*** | | | | index 0000000..7898192
+*** | | | | index BEFORE..AFTER
 *** | | | | --- /dev/null
 *** | | | | +++ b/tangle-a
 *** | | | | @@ -0,0 +1 @@
@@ -1358,7 +1361,7 @@ cat >expect <<\EOF
 *** | | | |
 *** | | | |   diff --git a/2 b/2
 *** | | | |   new file mode 100644
-*** | | | |   index 0000000..0cfbf08
+*** | | | |   index BEFORE..AFTER
 *** | | | |   --- /dev/null
 *** | | | |   +++ b/2
 *** | | | |   @@ -0,0 +1 @@
@@ -1374,7 +1377,7 @@ cat >expect <<\EOF
 *** | | | |
 *** | | | | diff --git a/1 b/1
 *** | | | | new file mode 100644
-*** | | | | index 0000000..d00491f
+*** | | | | index BEFORE..AFTER
 *** | | | | --- /dev/null
 *** | | | | +++ b/1
 *** | | | | @@ -0,0 +1 @@
@@ -1390,7 +1393,7 @@ cat >expect <<\EOF
 *** | | | |
 *** | | | | diff --git a/one b/one
 *** | | | | new file mode 100644
-*** | | | | index 0000000..9a33383
+*** | | | | index BEFORE..AFTER
 *** | | | | --- /dev/null
 *** | | | | +++ b/one
 *** | | | | @@ -0,0 +1 @@
@@ -1406,7 +1409,7 @@ cat >expect <<\EOF
 *** | | |
 *** | | |   diff --git a/a/two b/a/two
 *** | | |   deleted file mode 100644
-*** | | |   index 9245af5..0000000
+*** | | |   index BEFORE..AFTER
 *** | | |   --- a/a/two
 *** | | |   +++ /dev/null
 *** | | |   @@ -1 +0,0 @@
@@ -1422,7 +1425,7 @@ cat >expect <<\EOF
 *** | | |
 *** | | | diff --git a/a/two b/a/two
 *** | | | new file mode 100644
-*** | | | index 0000000..9245af5
+*** | | | index BEFORE..AFTER
 *** | | | --- /dev/null
 *** | | | +++ b/a/two
 *** | | | @@ -0,0 +1 @@
@@ -1438,7 +1441,7 @@ cat >expect <<\EOF
 *** | |
 *** | |   diff --git a/ein b/ein
 *** | |   new file mode 100644
-*** | |   index 0000000..9d7e69f
+*** | |   index BEFORE..AFTER
 *** | |   --- /dev/null
 *** | |   +++ b/ein
 *** | |   @@ -0,0 +1 @@
@@ -1455,14 +1458,14 @@ cat >expect <<\EOF
 *** |
 *** |   diff --git a/ichi b/ichi
 *** |   new file mode 100644
-*** |   index 0000000..9d7e69f
+*** |   index BEFORE..AFTER
 *** |   --- /dev/null
 *** |   +++ b/ichi
 *** |   @@ -0,0 +1 @@
 *** |   +ichi
 *** |   diff --git a/one b/one
 *** |   deleted file mode 100644
-*** |   index 9d7e69f..0000000
+*** |   index BEFORE..AFTER
 *** |   --- a/one
 *** |   +++ /dev/null
 *** |   @@ -1 +0,0 @@
@@ -1477,7 +1480,7 @@ cat >expect <<\EOF
 *** |  1 file changed, 1 insertion(+), 1 deletion(-)
 *** |
 *** | diff --git a/one b/one
-*** | index 5626abf..9d7e69f 100644
+*** | index BEFORE..AFTER 100644
 *** | --- a/one
 *** | +++ b/one
 *** | @@ -1 +1 @@
@@ -1494,7 +1497,7 @@ cat >expect <<\EOF
 ***
 ***   diff --git a/one b/one
 ***   new file mode 100644
-***   index 0000000..5626abf
+***   index BEFORE..AFTER
 ***   --- /dev/null
 ***   +++ b/one
 ***   @@ -0,0 +1 @@
@@ -1709,10 +1712,10 @@ test_expect_success 'set up --source tests' '
 '
 
 test_expect_success 'log --source paints branch names' '
-	cat >expect <<-\EOF &&
-	09e12a9	source-b three
-	8e393e1	source-a two
-	1ac6c77	source-b one
+	cat >expect <<-EOF &&
+	$(git rev-parse --short :/three)	source-b three
+	$(git rev-parse --short :/two  )	source-a two
+	$(git rev-parse --short :/one  )	source-b one
 	EOF
 	git log --oneline --source source-a source-b >actual &&
 	test_cmp expect actual
@@ -1720,19 +1723,19 @@ test_expect_success 'log --source paints branch names' '
 
 test_expect_success 'log --source paints tag names' '
 	git tag -m tagged source-tag &&
-	cat >expect <<-\EOF &&
-	09e12a9	source-tag three
-	8e393e1	source-a two
-	1ac6c77	source-tag one
+	cat >expect <<-EOF &&
+	$(git rev-parse --short :/three)	source-tag three
+	$(git rev-parse --short :/two  )	source-a two
+	$(git rev-parse --short :/one  )	source-tag one
 	EOF
 	git log --oneline --source source-tag source-a >actual &&
 	test_cmp expect actual
 '
 
 test_expect_success 'log --source paints symmetric ranges' '
-	cat >expect <<-\EOF &&
-	09e12a9	source-b three
-	8e393e1	source-a two
+	cat >expect <<-EOF &&
+	$(git rev-parse --short :/three)	source-b three
+	$(git rev-parse --short :/two  )	source-a two
 	EOF
 	git log --oneline --source source-a...source-b >actual &&
 	test_cmp expect actual
diff --git a/t/t4204-patch-id.sh b/t/t4204-patch-id.sh
index 0288c17ec6..8ff8bd84c7 100755
--- a/t/t4204-patch-id.sh
+++ b/t/t4204-patch-id.sh
@@ -25,7 +25,7 @@ test_expect_success 'setup' '
 
 test_expect_success 'patch-id output is well-formed' '
 	git log -p -1 | git patch-id >output &&
-	grep "^[a-f0-9]\{40\} $(git rev-parse HEAD)$" output
+	grep "^$OID_REGEX $(git rev-parse HEAD)$" output
 '
 
 #calculate patch id. Make sure output is not empty.
diff --git a/t/t4300-merge-tree.sh b/t/t4300-merge-tree.sh
index d87cc7d9ef..e59601e5fe 100755
--- a/t/t4300-merge-tree.sh
+++ b/t/t4300-merge-tree.sh
@@ -11,16 +11,16 @@ test_expect_success setup '
 '
 
 test_expect_success 'file add A, !B' '
-	cat >expected <<\EXPECTED &&
+	git reset --hard initial &&
+	test_commit "add-a-not-b" "ONE" "AAA" &&
+	git merge-tree initial initial add-a-not-b >actual &&
+	cat >expected <<EXPECTED &&
 added in remote
-  their  100644 43d5a8ed6ef6c00ff775008633f95787d088285d ONE
+  their  100644 $(git rev-parse HEAD:ONE) ONE
 @@ -0,0 +1 @@
 +AAA
 EXPECTED
 
-	git reset --hard initial &&
-	test_commit "add-a-not-b" "ONE" "AAA" &&
-	git merge-tree initial initial add-a-not-b >actual &&
 	test_cmp expected actual
 '
 
@@ -41,10 +41,15 @@ test_expect_success 'file add A, B (same)' '
 '
 
 test_expect_success 'file add A, B (different)' '
-	cat >expected <<\EXPECTED &&
+	git reset --hard initial &&
+	test_commit "add-a-b-diff-A" "ONE" "AAA" &&
+	git reset --hard initial &&
+	test_commit "add-a-b-diff-B" "ONE" "BBB" &&
+	git merge-tree initial add-a-b-diff-A add-a-b-diff-B >actual &&
+	cat >expected <<EXPECTED &&
 added in both
-  our    100644 43d5a8ed6ef6c00ff775008633f95787d088285d ONE
-  their  100644 ba629238ca89489f2b350e196ca445e09d8bb834 ONE
+  our    100644 $(git rev-parse add-a-b-diff-A:ONE) ONE
+  their  100644 $(git rev-parse add-a-b-diff-B:ONE) ONE
 @@ -1 +1,5 @@
 +<<<<<<< .our
  AAA
@@ -53,11 +58,6 @@ added in both
 +>>>>>>> .their
 EXPECTED
 
-	git reset --hard initial &&
-	test_commit "add-a-b-diff-A" "ONE" "AAA" &&
-	git reset --hard initial &&
-	test_commit "add-a-b-diff-B" "ONE" "BBB" &&
-	git merge-tree initial add-a-b-diff-A add-a-b-diff-B >actual &&
 	test_cmp expected actual
 '
 
@@ -69,18 +69,18 @@ test_expect_success 'file change A, !B' '
 '
 
 test_expect_success 'file change !A, B' '
-	cat >expected <<\EXPECTED &&
+	git reset --hard initial &&
+	test_commit "change-not-a-b" "initial-file" "BBB" &&
+	git merge-tree initial initial change-not-a-b >actual &&
+	cat >expected <<EXPECTED &&
 merged
-  result 100644 ba629238ca89489f2b350e196ca445e09d8bb834 initial-file
-  our    100644 e79c5e8f964493290a409888d5413a737e8e5dd5 initial-file
+  result 100644 $(git rev-parse change-a-not-b:initial-file) initial-file
+  our    100644 $(git rev-parse initial:initial-file       ) initial-file
 @@ -1 +1 @@
 -initial
 +BBB
 EXPECTED
 
-	git reset --hard initial &&
-	test_commit "change-not-a-b" "initial-file" "BBB" &&
-	git merge-tree initial initial change-not-a-b >actual &&
 	test_cmp expected actual
 '
 
@@ -94,11 +94,16 @@ test_expect_success 'file change A, B (same)' '
 '
 
 test_expect_success 'file change A, B (different)' '
-	cat >expected <<\EXPECTED &&
+	git reset --hard initial &&
+	test_commit "change-a-b-diff-A" "initial-file" "AAA" &&
+	git reset --hard initial &&
+	test_commit "change-a-b-diff-B" "initial-file" "BBB" &&
+	git merge-tree initial change-a-b-diff-A change-a-b-diff-B >actual &&
+	cat >expected <<EXPECTED &&
 changed in both
-  base   100644 e79c5e8f964493290a409888d5413a737e8e5dd5 initial-file
-  our    100644 43d5a8ed6ef6c00ff775008633f95787d088285d initial-file
-  their  100644 ba629238ca89489f2b350e196ca445e09d8bb834 initial-file
+  base   100644 $(git rev-parse initial:initial-file          ) initial-file
+  our    100644 $(git rev-parse change-a-b-diff-A:initial-file) initial-file
+  their  100644 $(git rev-parse change-a-b-diff-B:initial-file) initial-file
 @@ -1 +1,5 @@
 +<<<<<<< .our
  AAA
@@ -107,34 +112,10 @@ changed in both
 +>>>>>>> .their
 EXPECTED
 
-	git reset --hard initial &&
-	test_commit "change-a-b-diff-A" "initial-file" "AAA" &&
-	git reset --hard initial &&
-	test_commit "change-a-b-diff-B" "initial-file" "BBB" &&
-	git merge-tree initial change-a-b-diff-A change-a-b-diff-B >actual &&
 	test_cmp expected actual
 '
 
 test_expect_success 'file change A, B (mixed)' '
-	cat >expected <<\EXPECTED &&
-changed in both
-  base   100644 f4f1f998c7776568c4ff38f516d77fef9399b5a7 ONE
-  our    100644 af14c2c3475337c73759d561ef70b59e5c731176 ONE
-  their  100644 372d761493f524d44d59bd24700c3bdf914c973c ONE
-@@ -7,7 +7,11 @@
- AAA
- AAA
- AAA
-+<<<<<<< .our
- BBB
-+=======
-+CCC
-+>>>>>>> .their
- AAA
- AAA
- AAA
-EXPECTED
-
 	git reset --hard initial &&
 	test_commit "change-a-b-mix-base" "ONE" "
 AAA
@@ -159,6 +140,26 @@ AAA" &&
 		"$(sed -e "1{s/AAA/BBB/;}" -e "10{s/AAA/CCC/;}" <ONE)" &&
 	git merge-tree change-a-b-mix-base change-a-b-mix-A change-a-b-mix-B \
 		>actual &&
+
+	cat >expected <<EXPECTED &&
+changed in both
+  base   100644 $(git rev-parse change-a-b-mix-base:ONE) ONE
+  our    100644 $(git rev-parse change-a-b-mix-A:ONE   ) ONE
+  their  100644 $(git rev-parse change-a-b-mix-B:ONE   ) ONE
+@@ -7,7 +7,11 @@
+ AAA
+ AAA
+ AAA
++<<<<<<< .our
+ BBB
++=======
++CCC
++>>>>>>> .their
+ AAA
+ AAA
+ AAA
+EXPECTED
+
 	test_cmp expected actual
 '
 
@@ -173,20 +174,20 @@ test_expect_success 'file remove A, !B' '
 '
 
 test_expect_success 'file remove !A, B' '
-	cat >expected <<\EXPECTED &&
-removed in remote
-  base   100644 43d5a8ed6ef6c00ff775008633f95787d088285d ONE
-  our    100644 43d5a8ed6ef6c00ff775008633f95787d088285d ONE
-@@ -1 +0,0 @@
--AAA
-EXPECTED
-
 	git reset --hard initial &&
 	test_commit "rm-not-a-b-base" "ONE" "AAA" &&
 	git rm ONE &&
 	git commit -m "rm-not-a-b" &&
 	git tag "rm-not-a-b" &&
 	git merge-tree rm-a-not-b-base rm-a-not-b-base rm-a-not-b >actual &&
+	cat >expected <<EXPECTED &&
+removed in remote
+  base   100644 $(git rev-parse rm-a-not-b-base:ONE) ONE
+  our    100644 $(git rev-parse rm-a-not-b-base:ONE) ONE
+@@ -1 +0,0 @@
+-AAA
+EXPECTED
+
 	test_cmp expected actual
 '
 
@@ -201,14 +202,6 @@ test_expect_success 'file remove A, B (same)' '
 '
 
 test_expect_success 'file change A, remove B' '
-	cat >expected <<\EXPECTED &&
-removed in remote
-  base   100644 43d5a8ed6ef6c00ff775008633f95787d088285d ONE
-  our    100644 ba629238ca89489f2b350e196ca445e09d8bb834 ONE
-@@ -1 +0,0 @@
--BBB
-EXPECTED
-
 	git reset --hard initial &&
 	test_commit "change-a-rm-b-base" "ONE" "AAA" &&
 	test_commit "change-a-rm-b-A" "ONE" "BBB" &&
@@ -218,16 +211,18 @@ EXPECTED
 	git tag "change-a-rm-b-B" &&
 	git merge-tree change-a-rm-b-base change-a-rm-b-A change-a-rm-b-B \
 		>actual &&
+	cat >expected <<EXPECTED &&
+removed in remote
+  base   100644 $(git rev-parse change-a-rm-b-base:ONE) ONE
+  our    100644 $(git rev-parse change-a-rm-b-A:ONE   ) ONE
+@@ -1 +0,0 @@
+-BBB
+EXPECTED
+
 	test_cmp expected actual
 '
 
 test_expect_success 'file remove A, change B' '
-	cat >expected <<\EXPECTED &&
-removed in local
-  base   100644 43d5a8ed6ef6c00ff775008633f95787d088285d ONE
-  their  100644 ba629238ca89489f2b350e196ca445e09d8bb834 ONE
-EXPECTED
-
 	git reset --hard initial &&
 	test_commit "rm-a-change-b-base" "ONE" "AAA" &&
 
@@ -238,6 +233,11 @@ EXPECTED
 	test_commit "rm-a-change-b-B" "ONE" "BBB" &&
 	git merge-tree rm-a-change-b-base rm-a-change-b-A rm-a-change-b-B \
 		>actual &&
+	cat >expected <<EXPECTED &&
+removed in local
+  base   100644 $(git rev-parse rm-a-change-b-base:ONE) ONE
+  their  100644 $(git rev-parse rm-a-change-b-B:ONE   ) ONE
+EXPECTED
 	test_cmp expected actual
 '
 
@@ -250,10 +250,17 @@ test_expect_success 'tree add A, B (same)' '
 '
 
 test_expect_success 'tree add A, B (different)' '
-	cat >expect <<-\EOF &&
+	git reset --hard initial &&
+	mkdir sub &&
+	test_commit "add sub/file" "sub/file" "AAA" add-tree-a-b-A &&
+	git reset --hard initial &&
+	mkdir sub &&
+	test_commit "add sub/file" "sub/file" "BBB" add-tree-a-b-B &&
+	git merge-tree initial add-tree-a-b-A add-tree-a-b-B >actual &&
+	cat >expect <<-EOF &&
 	added in both
-	  our    100644 43d5a8ed6ef6c00ff775008633f95787d088285d sub/file
-	  their  100644 ba629238ca89489f2b350e196ca445e09d8bb834 sub/file
+	  our    100644 $(git rev-parse add-tree-a-b-A:sub/file) sub/file
+	  their  100644 $(git rev-parse add-tree-a-b-B:sub/file) sub/file
 	@@ -1 +1,5 @@
 	+<<<<<<< .our
 	 AAA
@@ -261,24 +268,10 @@ test_expect_success 'tree add A, B (different)' '
 	+BBB
 	+>>>>>>> .their
 	EOF
-	git reset --hard initial &&
-	mkdir sub &&
-	test_commit "add sub/file" "sub/file" "AAA" add-tree-a-b-A &&
-	git reset --hard initial &&
-	mkdir sub &&
-	test_commit "add sub/file" "sub/file" "BBB" add-tree-a-b-B &&
-	git merge-tree initial add-tree-a-b-A add-tree-a-b-B >actual &&
 	test_cmp expect actual
 '
 
 test_expect_success 'tree unchanged A, removed B' '
-	cat >expect <<-\EOF &&
-	removed in remote
-	  base   100644 43d5a8ed6ef6c00ff775008633f95787d088285d sub/file
-	  our    100644 43d5a8ed6ef6c00ff775008633f95787d088285d sub/file
-	@@ -1 +0,0 @@
-	-AAA
-	EOF
 	git reset --hard initial &&
 	mkdir sub &&
 	test_commit "add sub/file" "sub/file" "AAA" tree-remove-b-initial &&
@@ -287,6 +280,13 @@ test_expect_success 'tree unchanged A, removed B' '
 	git commit -m "remove sub/file" &&
 	git tag tree-remove-b-B &&
 	git merge-tree tree-remove-b-initial tree-remove-b-initial tree-remove-b-B >actual &&
+	cat >expect <<-EOF &&
+	removed in remote
+	  base   100644 $(git rev-parse tree-remove-b-initial:sub/file) sub/file
+	  our    100644 $(git rev-parse tree-remove-b-initial:sub/file) sub/file
+	@@ -1 +0,0 @@
+	-AAA
+	EOF
 	test_cmp expect actual
 '
 
@@ -296,14 +296,14 @@ test_expect_success 'turn file to tree' '
 	mkdir initial-file &&
 	test_commit "turn-file-to-tree" "initial-file/ONE" "CCC" &&
 	git merge-tree initial initial turn-file-to-tree >actual &&
-	cat >expect <<-\EOF &&
+	cat >expect <<-EOF &&
 	added in remote
-	  their  100644 43aa4fdec31eb92e1fdc2f0ce6ea9ddb7c32bcf7 initial-file/ONE
+	  their  100644 $(git rev-parse turn-file-to-tree:initial-file/ONE) initial-file/ONE
 	@@ -0,0 +1 @@
 	+CCC
 	removed in remote
-	  base   100644 e79c5e8f964493290a409888d5413a737e8e5dd5 initial-file
-	  our    100644 e79c5e8f964493290a409888d5413a737e8e5dd5 initial-file
+	  base   100644 $(git rev-parse initial:initial-file) initial-file
+	  our    100644 $(git rev-parse initial:initial-file) initial-file
 	@@ -1 +0,0 @@
 	-initial
 	EOF
@@ -318,14 +318,14 @@ test_expect_success 'turn tree to file' '
 	rm -fr dir &&
 	test_commit "make-file" "dir" "CCC" &&
 	git merge-tree add-tree add-another-tree make-file >actual &&
-	cat >expect <<-\EOF &&
+	cat >expect <<-EOF &&
 	removed in remote
-	  base   100644 43d5a8ed6ef6c00ff775008633f95787d088285d dir/path
-	  our    100644 43d5a8ed6ef6c00ff775008633f95787d088285d dir/path
+	  base   100644 $(git rev-parse add-tree:dir/path) dir/path
+	  our    100644 $(git rev-parse add-tree:dir/path) dir/path
 	@@ -1 +0,0 @@
 	-AAA
 	added in remote
-	  their  100644 43aa4fdec31eb92e1fdc2f0ce6ea9ddb7c32bcf7 dir
+	  their  100644 $(git rev-parse make-file:dir) dir
 	@@ -0,0 +1 @@
 	+CCC
 	EOF
diff --git a/t/t5318-commit-graph.sh b/t/t5318-commit-graph.sh
index 3f03de6018..81cf118cb6 100755
--- a/t/t5318-commit-graph.sh
+++ b/t/t5318-commit-graph.sh
@@ -481,7 +481,7 @@ test_expect_success 'detect bad version' '
 '
 
 test_expect_success 'detect bad hash version' '
-	corrupt_graph_and_verify $GRAPH_BYTE_HASH "\02" \
+	corrupt_graph_and_verify $GRAPH_BYTE_HASH "\03" \
 		"hash version"
 '
 
diff --git a/t/t5319-multi-pack-index.sh b/t/t5319-multi-pack-index.sh
index cd2f87be6a..43a7a66c9d 100755
--- a/t/t5319-multi-pack-index.sh
+++ b/t/t5319-multi-pack-index.sh
@@ -28,6 +28,20 @@ midx_read_expect () {
 	test_cmp expect actual
 }
 
+test_expect_success 'setup' '
+	test_oid_init &&
+	test_oid_cache <<-EOF
+	idxoff sha1:2999
+	idxoff sha256:3739
+
+	packnameoff sha1:652
+	packnameoff sha256:940
+
+	fanoutoff sha1:1
+	fanoutoff sha256:3
+	EOF
+'
+
 test_expect_success 'write midx with no packs' '
 	test_when_finished rm -f pack/multi-pack-index &&
 	git multi-pack-index --object-dir=. write &&
@@ -225,7 +239,7 @@ test_expect_success 'verify bad signature' '
 		"multi-pack-index signature"
 '
 
-HASH_LEN=20
+HASH_LEN=$(test_oid rawsz)
 NUM_OBJECTS=74
 MIDX_BYTE_VERSION=4
 MIDX_BYTE_OID_VERSION=5
@@ -238,9 +252,9 @@ MIDX_CHUNK_LOOKUP_WIDTH=12
 MIDX_OFFSET_PACKNAMES=$(($MIDX_HEADER_SIZE + \
 			 $MIDX_NUM_CHUNKS * $MIDX_CHUNK_LOOKUP_WIDTH))
 MIDX_BYTE_PACKNAME_ORDER=$(($MIDX_OFFSET_PACKNAMES + 2))
-MIDX_OFFSET_OID_FANOUT=$(($MIDX_OFFSET_PACKNAMES + 652))
+MIDX_OFFSET_OID_FANOUT=$(($MIDX_OFFSET_PACKNAMES + $(test_oid packnameoff)))
 MIDX_OID_FANOUT_WIDTH=4
-MIDX_BYTE_OID_FANOUT_ORDER=$((MIDX_OFFSET_OID_FANOUT + 250 * $MIDX_OID_FANOUT_WIDTH + 1))
+MIDX_BYTE_OID_FANOUT_ORDER=$((MIDX_OFFSET_OID_FANOUT + 250 * $MIDX_OID_FANOUT_WIDTH + $(test_oid fanoutoff)))
 MIDX_OFFSET_OID_LOOKUP=$(($MIDX_OFFSET_OID_FANOUT + 256 * $MIDX_OID_FANOUT_WIDTH))
 MIDX_BYTE_OID_LOOKUP=$(($MIDX_OFFSET_OID_LOOKUP + 16 * $HASH_LEN))
 MIDX_OFFSET_OBJECT_OFFSETS=$(($MIDX_OFFSET_OID_LOOKUP + $NUM_OBJECTS * $HASH_LEN))
@@ -304,12 +318,12 @@ test_expect_success 'verify incorrect pack-int-id' '
 '
 
 test_expect_success 'verify incorrect offset' '
-	corrupt_midx_and_verify $MIDX_BYTE_OFFSET "\07" $objdir \
+	corrupt_midx_and_verify $MIDX_BYTE_OFFSET "\377" $objdir \
 		"incorrect object offset"
 '
 
 test_expect_success 'git-fsck incorrect offset' '
-	corrupt_midx_and_verify $MIDX_BYTE_OFFSET "\07" $objdir \
+	corrupt_midx_and_verify $MIDX_BYTE_OFFSET "\377" $objdir \
 		"incorrect object offset" \
 		"git -c core.multipackindex=true fsck"
 '
@@ -387,7 +401,7 @@ test_expect_success 'force some 64-bit offsets with pack-objects' '
 	pack64=$(git pack-objects --index-version=2,0x40 objects64/pack/test-64 <obj-list) &&
 	idx64=objects64/pack/test-64-$pack64.idx &&
 	chmod u+w $idx64 &&
-	corrupt_data $idx64 2999 "\02" &&
+	corrupt_data $idx64 $(test_oid idxoff) "\02" &&
 	midx64=$(git multi-pack-index --object-dir=objects64 write) &&
 	midx_read_expect 1 63 5 objects64 " large-offsets"
 '
diff --git a/t/t5324-split-commit-graph.sh b/t/t5324-split-commit-graph.sh
index c24823431f..53b2e6b455 100755
--- a/t/t5324-split-commit-graph.sh
+++ b/t/t5324-split-commit-graph.sh
@@ -11,7 +11,14 @@ test_expect_success 'setup repo' '
 	git config gc.writeCommitGraph false &&
 	infodir=".git/objects/info" &&
 	graphdir="$infodir/commit-graphs" &&
-	test_oid_init
+	test_oid_init &&
+	test_oid_cache <<-EOM
+	shallow sha1:1760
+	shallow sha256:2064
+
+	base sha1:1376
+	base sha256:1496
+	EOM
 '
 
 graph_read_expect() {
@@ -248,7 +255,7 @@ test_expect_success 'verify hashes along chain, even in shallow' '
 		cd verify &&
 		git commit-graph verify &&
 		base_file=$graphdir/graph-$(head -n 1 $graphdir/commit-graph-chain).graph &&
-		corrupt_file "$base_file" 1760 "\01" &&
+		corrupt_file "$base_file" $(test_oid shallow) "\01" &&
 		test_must_fail git commit-graph verify --shallow 2>test_err &&
 		grep -v "^+" test_err >err &&
 		test_i18ngrep "incorrect checksum" err
@@ -275,7 +282,7 @@ test_expect_success 'warn on base graph chunk incorrect' '
 		cd base-chunk &&
 		git commit-graph verify &&
 		base_file=$graphdir/graph-$(tail -n 1 $graphdir/commit-graph-chain).graph &&
-		corrupt_file "$base_file" 1376 "\01" &&
+		corrupt_file "$base_file" $(test_oid base) "\01" &&
 		git commit-graph verify --shallow 2>test_err &&
 		grep -v "^+" test_err >err &&
 		test_i18ngrep "commit-graph chain does not match" err
diff --git a/t/t5504-fetch-receive-strict.sh b/t/t5504-fetch-receive-strict.sh
index fdfe179b11..645b4c78d3 100755
--- a/t/t5504-fetch-receive-strict.sh
+++ b/t/t5504-fetch-receive-strict.sh
@@ -4,6 +4,7 @@ test_description='fetch/receive strict mode'
 . ./test-lib.sh
 
 test_expect_success 'setup and inject "corrupt or missing" object' '
+	test_oid_init &&
 	echo hello >greetings &&
 	git add greetings &&
 	git commit -m greetings &&
@@ -144,11 +145,11 @@ test_expect_success 'fsck with no skipList input' '
 
 test_expect_success 'setup sorted and unsorted skipLists' '
 	cat >SKIP.unsorted <<-EOF &&
-	0000000000000000000000000000000000000004
-	0000000000000000000000000000000000000002
+	$(test_oid 004)
+	$(test_oid 002)
 	$commit
-	0000000000000000000000000000000000000001
-	0000000000000000000000000000000000000003
+	$(test_oid 001)
+	$(test_oid 003)
 	EOF
 	sort SKIP.unsorted >SKIP.sorted
 '
@@ -172,14 +173,14 @@ test_expect_success 'fsck with invalid or bogus skipList input' '
 test_expect_success 'fsck with other accepted skipList input (comments & empty lines)' '
 	cat >SKIP.with-comment <<-EOF &&
 	# Some bad commit
-	0000000000000000000000000000000000000001
+	$(test_oid 001)
 	EOF
 	test_must_fail git -c fsck.skipList=SKIP.with-comment fsck 2>err-with-comment &&
 	test_i18ngrep "missingEmail" err-with-comment &&
 	cat >SKIP.with-empty-line <<-EOF &&
-	0000000000000000000000000000000000000001
+	$(test_oid 001)
 
-	0000000000000000000000000000000000000002
+	$(test_oid 002)
 	EOF
 	test_must_fail git -c fsck.skipList=SKIP.with-empty-line fsck 2>err-with-empty-line &&
 	test_i18ngrep "missingEmail" err-with-empty-line
@@ -204,7 +205,7 @@ test_expect_success 'fsck with exhaustive accepted skipList input (various types
 	echo " # Comment after whitespace" >>SKIP.exhaustive &&
 	echo "$commit # Our bad commit (with leading whitespace and trailing comment)" >>SKIP.exhaustive &&
 	echo "# Some bad commit (leading whitespace)" >>SKIP.exhaustive &&
-	echo "  0000000000000000000000000000000000000001" >>SKIP.exhaustive &&
+	echo "  $(test_oid 001)" >>SKIP.exhaustive &&
 	git -c fsck.skipList=SKIP.exhaustive fsck 2>err &&
 	test_must_be_empty err
 '
diff --git a/t/t5510-fetch.sh b/t/t5510-fetch.sh
index 5f8f1c287f..566994cede 100755
--- a/t/t5510-fetch.sh
+++ b/t/t5510-fetch.sh
@@ -11,7 +11,7 @@ D=$(pwd)
 
 test_bundle_object_count () {
 	git verify-pack -v "$1" >verify.out &&
-	test "$2" = $(grep '^[0-9a-f]\{40\} ' verify.out | wc -l)
+	test "$2" = $(grep "^$OID_REGEX " verify.out | wc -l)
 }
 
 convert_bundle_to_pack () {
@@ -285,9 +285,10 @@ test_expect_success 'create bundle 1' '
 '
 
 test_expect_success 'header of bundle looks right' '
+	head -n 4 "$D"/bundle1 &&
 	head -n 1 "$D"/bundle1 | grep "^#" &&
-	head -n 2 "$D"/bundle1 | grep "^-[0-9a-f]\{40\} " &&
-	head -n 3 "$D"/bundle1 | grep "^[0-9a-f]\{40\} " &&
+	head -n 2 "$D"/bundle1 | grep "^-$OID_REGEX " &&
+	head -n 3 "$D"/bundle1 | grep "^$OID_REGEX " &&
 	head -n 4 "$D"/bundle1 | grep "^$"
 '
 
@@ -313,7 +314,7 @@ test_expect_success 'bundle 1 has only 3 files ' '
 test_expect_success 'unbundle 2' '
 	cd "$D/bundle" &&
 	git fetch ../bundle2 master:master &&
-	test "tip" = "$(git log -1 --pretty=oneline master | cut -b42-)"
+	test "tip" = "$(git log -1 --pretty=oneline master | cut -d" " -f2)"
 '
 
 test_expect_success 'bundle does not prerequisite objects' '
diff --git a/t/t5512-ls-remote.sh b/t/t5512-ls-remote.sh
index d7b9f9078f..62152bad1d 100755
--- a/t/t5512-ls-remote.sh
+++ b/t/t5512-ls-remote.sh
@@ -230,9 +230,10 @@ test_expect_success 'ls-remote --symref' '
 '
 
 test_expect_success 'ls-remote with filtered symref (refname)' '
-	cat >expect <<-\EOF &&
+	rev=$(git rev-parse HEAD) &&
+	cat >expect <<-EOF &&
 	ref: refs/heads/master	HEAD
-	1bd44cb9d13204b0fe1958db0082f5028a16eb3a	HEAD
+	$rev	HEAD
 	EOF
 	# Protocol v2 supports sending symrefs for refs other than HEAD, so use
 	# protocol v0 here.
@@ -242,10 +243,10 @@ test_expect_success 'ls-remote with filtered symref (refname)' '
 
 test_expect_failure 'ls-remote with filtered symref (--heads)' '
 	git symbolic-ref refs/heads/foo refs/tags/mark &&
-	cat >expect <<-\EOF &&
+	cat >expect <<-EOF &&
 	ref: refs/tags/mark	refs/heads/foo
-	1bd44cb9d13204b0fe1958db0082f5028a16eb3a	refs/heads/foo
-	1bd44cb9d13204b0fe1958db0082f5028a16eb3a	refs/heads/master
+	$rev	refs/heads/foo
+	$rev	refs/heads/master
 	EOF
 	# Protocol v2 supports sending symrefs for refs other than HEAD, so use
 	# protocol v0 here.
@@ -254,9 +255,9 @@ test_expect_failure 'ls-remote with filtered symref (--heads)' '
 '
 
 test_expect_success 'ls-remote --symref omits filtered-out matches' '
-	cat >expect <<-\EOF &&
-	1bd44cb9d13204b0fe1958db0082f5028a16eb3a	refs/heads/foo
-	1bd44cb9d13204b0fe1958db0082f5028a16eb3a	refs/heads/master
+	cat >expect <<-EOF &&
+	$rev	refs/heads/foo
+	$rev	refs/heads/master
 	EOF
 	# Protocol v2 supports sending symrefs for refs other than HEAD, so use
 	# protocol v0 here.
diff --git a/t/t5530-upload-pack-error.sh b/t/t5530-upload-pack-error.sh
index a1d3031d40..4ce9a9f704 100755
--- a/t/t5530-upload-pack-error.sh
+++ b/t/t5530-upload-pack-error.sh
@@ -14,7 +14,7 @@ corrupt_repo () {
 }
 
 test_expect_success 'setup and corrupt repository' '
-
+	test_oid_init &&
 	echo file >file &&
 	git add file &&
 	git rev-parse :file &&
@@ -31,9 +31,10 @@ test_expect_success 'fsck fails' '
 '
 
 test_expect_success 'upload-pack fails due to error in pack-objects packing' '
-
-	printf "0032want %s\n00000009done\n0000" \
-		$(git rev-parse HEAD) >input &&
+	head=$(git rev-parse HEAD) &&
+	hexsz=$(test_oid hexsz) &&
+	printf "%04xwant %s\n00000009done\n0000" \
+		$(($hexsz + 10)) $head >input &&
 	test_must_fail git upload-pack . <input >/dev/null 2>output.err &&
 	test_i18ngrep "unable to read" output.err &&
 	test_i18ngrep "pack-objects died" output.err
@@ -51,16 +52,17 @@ test_expect_success 'fsck fails' '
 '
 test_expect_success 'upload-pack fails due to error in rev-list' '
 
-	printf "0032want %s\n0034shallow %s00000009done\n0000" \
-		$(git rev-parse HEAD) $(git rev-parse HEAD^) >input &&
+	printf "%04xwant %s\n%04xshallow %s00000009done\n0000" \
+		$(($hexsz + 10)) $(git rev-parse HEAD) \
+		$(($hexsz + 12)) $(git rev-parse HEAD^) >input &&
 	test_must_fail git upload-pack . <input >/dev/null 2>output.err &&
 	grep "bad tree object" output.err
 '
 
 test_expect_success 'upload-pack fails due to bad want (no object)' '
 
-	printf "0045want %s multi_ack_detailed\n00000009done\n0000" \
-		"deadbeefdeadbeefdeadbeefdeadbeefdeadbeef" >input &&
+	printf "%04xwant %s multi_ack_detailed\n00000009done\n0000" \
+		$(($hexsz + 29)) $(test_oid deadbeef) >input &&
 	test_must_fail git upload-pack . <input >output 2>output.err &&
 	grep "not our ref" output.err &&
 	grep "ERR" output &&
@@ -70,8 +72,8 @@ test_expect_success 'upload-pack fails due to bad want (no object)' '
 test_expect_success 'upload-pack fails due to bad want (not tip)' '
 
 	oid=$(echo an object we have | git hash-object -w --stdin) &&
-	printf "0045want %s multi_ack_detailed\n00000009done\n0000" \
-		"$oid" >input &&
+	printf "%04xwant %s multi_ack_detailed\n00000009done\n0000" \
+		$(($hexsz + 29)) "$oid" >input &&
 	test_must_fail git upload-pack . <input >output 2>output.err &&
 	grep "not our ref" output.err &&
 	grep "ERR" output &&
@@ -80,8 +82,8 @@ test_expect_success 'upload-pack fails due to bad want (not tip)' '
 
 test_expect_success 'upload-pack fails due to error in pack-objects enumeration' '
 
-	printf "0032want %s\n00000009done\n0000" \
-		$(git rev-parse HEAD) >input &&
+	printf "%04xwant %s\n00000009done\n0000" \
+		$((hexsz + 10)) $(git rev-parse HEAD) >input &&
 	test_must_fail git upload-pack . <input >/dev/null 2>output.err &&
 	grep "bad tree object" output.err &&
 	grep "pack-objects died" output.err
diff --git a/t/t5537-fetch-shallow.sh b/t/t5537-fetch-shallow.sh
index 97a67728ca..9e16512fe3 100755
--- a/t/t5537-fetch-shallow.sh
+++ b/t/t5537-fetch-shallow.sh
@@ -15,7 +15,11 @@ test_expect_success 'setup' '
 	commit 2 &&
 	commit 3 &&
 	commit 4 &&
-	git config --global transfer.fsckObjects true
+	git config --global transfer.fsckObjects true &&
+	test_oid_cache <<-EOF
+	sed sha1:s/0034shallow %s/0036unshallow %s/
+	sed sha256:s/004cshallow %s/004eunshallow %s/
+	EOF
 '
 
 test_expect_success 'setup shallow clone' '
@@ -239,7 +243,7 @@ test_expect_success 'shallow fetches check connectivity before writing shallow f
 	# with an empty packfile. This is done by refetching with a shorter
 	# depth (to ensure that the packfile is empty), and overwriting the
 	# shallow line in the response with the unshallow line we want.
-	printf "s/0034shallow %s/0036unshallow %s/" \
+	printf "$(test_oid sed)" \
 	       "$(git -C "$REPO" rev-parse HEAD)" \
 	       "$(git -C "$REPO" rev-parse HEAD^)" \
 	       >"$HTTPD_ROOT_PATH/one-time-sed" &&
diff --git a/t/t5540-http-push-webdav.sh b/t/t5540-http-push-webdav.sh
index a094fd5e71..d476c33509 100755
--- a/t/t5540-http-push-webdav.sh
+++ b/t/t5540-http-push-webdav.sh
@@ -134,15 +134,13 @@ test_expect_success 'MKCOL sends directory names with trailing slashes' '
 
 x1="[0-9a-f]"
 x2="$x1$x1"
-x5="$x1$x1$x1$x1$x1"
-x38="$x5$x5$x5$x5$x5$x5$x5$x1$x1$x1"
-x40="$x38$x2"
+xtrunc=$(echo $OID_REGEX | sed -e "s/\[0-9a-f\]\[0-9a-f\]//")
 
 test_expect_success 'PUT and MOVE sends object to URLs with SHA-1 hash suffix' '
 	sed \
 		-e "s/PUT /OP /" \
 		-e "s/MOVE /OP /" \
-	    -e "s|/objects/$x2/${x38}_$x40|WANTED_PATH_REQUEST|" \
+	    -e "s|/objects/$x2/${xtrunc}_$OID_REGEX|WANTED_PATH_REQUEST|" \
 		"$HTTPD_ROOT_PATH"/access.log |
 	grep -e "\"OP .*WANTED_PATH_REQUEST HTTP/[.0-9]*\" 20[0-9] "
 
diff --git a/t/t5562-http-backend-content-length.sh b/t/t5562-http-backend-content-length.sh
index f0f425b2cf..4a110b307e 100755
--- a/t/t5562-http-backend-content-length.sh
+++ b/t/t5562-http-backend-content-length.sh
@@ -59,7 +59,7 @@ test_expect_success 'setup' '
 	printf done | packetize >>fetch_body &&
 	test_copy_bytes 10 <fetch_body >fetch_body.trunc &&
 	hash_next=$(git commit-tree -p HEAD -m next HEAD^{tree}) &&
-	printf "%s %s refs/heads/newbranch\\0report-status\\n" "$_z40" "$hash_next" | packetize >push_body &&
+	printf "%s %s refs/heads/newbranch\\0report-status\\n" "$ZERO_OID" "$hash_next" | packetize >push_body &&
 	printf 0000 >>push_body &&
 	echo "$hash_next" | git pack-objects --stdout >>push_body &&
 	test_copy_bytes 10 <push_body >push_body.trunc &&
diff --git a/t/t5601-clone.sh b/t/t5601-clone.sh
index ad8c41176e..84ea2a3eb7 100755
--- a/t/t5601-clone.sh
+++ b/t/t5601-clone.sh
@@ -635,10 +635,10 @@ partial_clone_server () {
 	rm -rf "$SERVER" client &&
 	test_create_repo "$SERVER" &&
 	test_commit -C "$SERVER" one &&
-	HASH1=$(git hash-object "$SERVER/one.t") &&
+	HASH1=$(git -C "$SERVER" hash-object one.t) &&
 	git -C "$SERVER" revert HEAD &&
 	test_commit -C "$SERVER" two &&
-	HASH2=$(git hash-object "$SERVER/two.t") &&
+	HASH2=$(git -C "$SERVER" hash-object two.t) &&
 	test_config -C "$SERVER" uploadpack.allowfilter 1 &&
 	test_config -C "$SERVER" uploadpack.allowanysha1inwant 1
 }
diff --git a/t/t5604-clone-reference.sh b/t/t5604-clone-reference.sh
index 4894237ab8..0c74b4e21a 100755
--- a/t/t5604-clone-reference.sh
+++ b/t/t5604-clone-reference.sh
@@ -326,15 +326,16 @@ test_expect_success SYMLINKS 'clone repo with symlinked or unknown files at obje
 	for raw in $(ls T*.raw)
 	do
 		sed -e "s!/../!/Y/!; s![0-9a-f]\{38,\}!Z!" -e "/commit-graph/d" \
-		    -e "/multi-pack-index/d" <$raw >$raw.de-sha || return 1
+		    -e "/multi-pack-index/d" <$raw >$raw.de-sha-1 &&
+		sort $raw.de-sha-1 >$raw.de-sha || return 1
 	done &&
 
 	cat >expected-files <<-EOF &&
 	./Y/Z
 	./Y/Z
+	./Y/Z
 	./a-loose-dir/Z
 	./an-object
-	./Y/Z
 	./info/packs
 	./pack/pack-Z.idx
 	./pack/pack-Z.pack