diff --git a/importlib_resources/tests/test_open.py b/importlib_resources/tests/test_open.py
index afc05e2e71e5e27..a9fe11501b26765 100644
--- a/importlib_resources/tests/test_open.py
+++ b/importlib_resources/tests/test_open.py
@@ -33,11 +33,9 @@ def test_pathlib_path(self):
         with resources.open(data, path) as file:
             pass  # No error.
 
-    # Don't fail if run under e.g. pytest.
-    @unittest.skipIf(__spec__ is None, '__spec__ is None')
     def test_absolute_path(self):
         # An absolute path is a ValueError.
-        path = pathlib.Path(__spec__.origin)
+        path = pathlib.Path(__file__)
         full_path = path.parent/'utf-8.file'
         with self.assertRaises(ValueError):
             with resources.open(data, str(full_path)) as file: