gistfile1.txt

$ git diff
diff --git a/Lib/test/test_doctest.py b/Lib/test/test_doctest.py
index 5ad94aba64..9851661d88 100644
--- a/Lib/test/test_doctest.py
+++ b/Lib/test/test_doctest.py
@@ -7,6 +7,7 @@ import doctest
 import functools
 import os
 import sys
+import importlib


 # NOTE: There are some additional tests relating to interaction with
@@ -435,7 +436,7 @@ We'll simulate a __file__ attr that ends in pyc:
     >>> tests = finder.find(sample_func)

     >>> print(tests)  # doctest: +ELLIPSIS
-    [<DocTest sample_func from ...:19 (1 example)>]
+    [<DocTest sample_func from ...:20 (1 example)>]

 The exact name depends on how test_doctest was invoked, so allow for
 leading path components.
@@ -681,6 +682,13 @@ Note here that 'bin', 'oct', and 'hex' are functions; 'float.as_integer_ratio',
 and 'int' is a type.
 """

+    def test_empty_namespace_package(self):
+        pkg_name = 'doctest_empty_pkg'
+        os.mkdir(pkg_name)
+        mod = importlib.import_module(pkg_name)
+        assert doctest.DocTestFinder().find(mod) == []
+
+
 def test_DocTestParser(): r"""
 Unit tests for the `DocTestParser` class.