diff --git a/activesupport/lib/active_support/test_case.rb b/activesupport/lib/active_support/test_case.rb
index a2b205c14bb88..2df7b8033d483 100644
--- a/activesupport/lib/active_support/test_case.rb
+++ b/activesupport/lib/active_support/test_case.rb
@@ -147,5 +147,9 @@ def parallelize_teardown(&block)
     alias :assert_not_same :refute_same
 
     ActiveSupport.run_load_hooks(:active_support_test_case, self)
+
+    def inspect # :nodoc:
+      Object.instance_method(:to_s).bind_call(self)
+    end
   end
 end