diff --git a/tools/test.rb b/tools/test.rb
index 824ee57c960..ce546b382d9 100644
--- a/tools/test.rb
+++ b/tools/test.rb
@@ -4,6 +4,8 @@ require "bundler"
 Bundler.setup
 
 require "rails/test_unit/minitest_plugin"
+require "rails/test_unit/line_filtering"
+require "active_support/test_case"
 
 module Rails
   # Necessary to get rerun-snippts working.
@@ -12,6 +14,7 @@ module Rails
   end
 end
 
+ActiveSupport::TestCase.extend Rails::LineFiltering
 Rails::TestUnitReporter.executable = "bin/test"
 Minitest.run_via[:rails] = true
 require "active_support/testing/autorun"