Fix test_pydoc when sys.modules["test"] is first imported using importlib.import_module.
diff --git a/Lib/test/test_pydoc.py b/Lib/test/test_pydoc.py
index bfa99e7..a2b87c3 100644
--- a/Lib/test/test_pydoc.py
+++ b/Lib/test/test_pydoc.py
@@ -14,6 +14,10 @@
 
 from test import pydoc_mod
 
+# Just in case sys.modules["test"] has the optional attribute __loader__.
+if hasattr(pydoc_mod, "__loader__"):
+    del pydoc_mod.__loader__
+
 expected_text_pattern = \
 """
 NAME