diff --git a/test/core_ext/test_name_error_extension.rb b/test/core_ext/test_name_error_extension.rb
index c58b784..116c7cd 100644
--- a/test/core_ext/test_name_error_extension.rb
+++ b/test/core_ext/test_name_error_extension.rb
@@ -49,7 +49,7 @@ def test_correctable_error_objects_are_dumpable
 
     get_message(error)
 
-    assert_match(/^undefined method `sizee' for /,
+    assert_match(/^undefined method [`']sizee' for /,
                  Marshal.load(Marshal.dump(error)).original_message)
   end
 end