diff --git a/activerecord/test/cases/locking_test.rb b/activerecord/test/cases/locking_test.rb
index 77891b91567f3a6f0c7e05f0effb1d5230f21a4d..0030f1b464c0b9136938e5c42620f248e4f3818f 100644
--- a/activerecord/test/cases/locking_test.rb
+++ b/activerecord/test/cases/locking_test.rb
@@ -242,7 +242,7 @@ def test_polymorphic_destroy_with_dependencies_and_lock_version
     car = Car.create!
 
     assert_difference 'car.wheels.count'  do
-    	car.wheels << Wheel.create!
+      car.wheels << Wheel.create!
     end
     assert_difference 'car.wheels.count', -1  do
       car.destroy