diff --git a/guides/source/7_2_release_notes.md b/guides/source/7_2_release_notes.md
index 7f191e76e9..75e092c8ad 100644
--- a/guides/source/7_2_release_notes.md
+++ b/guides/source/7_2_release_notes.md
@@ -28,6 +28,8 @@ Please refer to the [Changelog][railties] for detailed changes.
 
 ### Removals
 
+*   Remove deprecated `Rails::Generators::Testing::Behaviour`.
+
 *   Remove deprecated `Rails.application.secrets`.
 
 *   Remove deprecated `Rails.config.enable_dependency_loading`.
diff --git a/railties/CHANGELOG.md b/railties/CHANGELOG.md
index 2521aca918..bdd577548a 100644
--- a/railties/CHANGELOG.md
+++ b/railties/CHANGELOG.md
@@ -1,3 +1,7 @@
+*   Remove deprecated `Rails::Generators::Testing::Behaviour`.
+
+    *Rafael Mendonça França*
+
 *   Remove deprecated `find_cmd_and_exec` console helper.
 
     *Rafael Mendonça França*
diff --git a/railties/lib/rails/generators/testing/behavior.rb b/railties/lib/rails/generators/testing/behavior.rb
index 53b48ba62c..8a66dca301 100644
--- a/railties/lib/rails/generators/testing/behavior.rb
+++ b/railties/lib/rails/generators/testing/behavior.rb
@@ -111,9 +111,6 @@ def migration_file_name(relative)
             Dir.glob("#{dirname}/[0-9]*_*.rb").grep(/\d+_#{file_name}.rb$/).first
           end
       end
-
-      include ActiveSupport::Deprecation::DeprecatedConstantAccessor
-      deprecate_constant "Behaviour", "Rails::Generators::Testing::Behavior", deprecator: Rails.deprecator
     end
   end
 end
diff --git a/railties/test/generators_test.rb b/railties/test/generators_test.rb
index 66aa0fdcea..a9fdd7116e 100644
--- a/railties/test/generators_test.rb
+++ b/railties/test/generators_test.rb
@@ -253,10 +253,4 @@ def test_hide_namespace
     Rails::Generators.hide_namespace("special:namespace")
     assert_includes Rails::Generators.hidden_namespaces, "special:namespace"
   end
-
-  def test_behaviour_aliases_behavior
-    assert_deprecated(Rails.deprecator) do
-      assert_same Rails::Generators::Testing::Behavior, Rails::Generators::Testing::Behaviour
-    end
-  end
 end