1 files changed, 3 insertions, 7 deletions
diff --git a/rubocop/cop/migration/add_concurrent_index.rb b/rubocop/cop/migration/add_concurrent_index.rb
index bfe7c15bfdf..77b8ced4778 100644
--- a/rubocop/cop/migration/add_concurrent_index.rb
+++ b/rubocop/cop/migration/add_concurrent_index.rb
@@ -7,7 +7,7 @@ module RuboCop
     module Migration
       # Cop that checks if `add_concurrent_index` is used with `up`/`down` methods
       # and not `change`.
-      class AddConcurrentIndex < RuboCop::Cop::Cop
+      class AddConcurrentIndex < RuboCop::Cop::Base
         include MigrationHelpers
 
         MSG = '`add_concurrent_index` is not reversible so you must manually define ' \
@@ -21,15 +21,11 @@ module RuboCop
           return unless name == :add_concurrent_index
 
           node.each_ancestor(:def) do |def_node|
-            next unless method_name(def_node) == :change
+            next unless def_node.method_name == :change
 
-            add_offense(def_node, location: :name)
+            add_offense(def_node.loc.name)
           end
         end
-
-        def method_name(node)
-          node.children.first
-        end
       end
     end
   end