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-rw-r--r--railties/lib/rails/test_unit/railtie.rb4
1 files changed, 3 insertions, 1 deletions
diff --git a/railties/lib/rails/test_unit/railtie.rb b/railties/lib/rails/test_unit/railtie.rb
index d0fc795515..746120e6a1 100644
--- a/railties/lib/rails/test_unit/railtie.rb
+++ b/railties/lib/rails/test_unit/railtie.rb
@@ -14,7 +14,9 @@ module Rails
end
initializer "test_unit.line_filtering" do
- ActiveSupport::TestCase.extend Rails::LineFiltering
+ ActiveSupport.on_load(:active_support_test_case) {
+ ActiveSupport::TestCase.extend Rails::LineFiltering
+ }
end
rake_tasks do