diff -r c59d81b802f8 Lib/test/test_importlib/test_spec.py
--- a/Lib/test/test_importlib/test_spec.py	Tue Mar 31 16:35:35 2015 +0200
+++ b/Lib/test/test_importlib/test_spec.py	Tue Mar 31 18:13:28 2015 +0300
@@ -219,9 +219,10 @@ class ModuleSpecTests:
         self.assertIs(cached, None)
 
     def test_cached_sourceless(self):
-        self.loc_spec.origin = 'spam.pyc'
+        filename = 'spam.py' + ('c' if __debug__ else 'o')
+        self.loc_spec.origin = filename
 
-        self.assertEqual(self.loc_spec.cached, 'spam.pyc')
+        self.assertEqual(self.loc_spec.cached, filename)
 
 
 (Frozen_ModuleSpecTests,