diff --git a/tests/test_core.py b/tests/test_core.py
index 5f04526..b0ecdc2 100644
--- a/tests/test_core.py
+++ b/tests/test_core.py
@@ -484,7 +484,7 @@ def sys_modules_sources():
     for module in list(sys.modules.values()):
         try:
             filename = inspect.getsourcefile(module)
-        except TypeError:
+        except (TypeError, AttributeError):
             continue
 
         if not filename: