Skip over any file or folder that starts with a dot (e.g. .svn).

Lib/importlib/test/__init__.py

@@ -6,6 +6,8 @@ import unittest
 def test_suite(package=__package__, directory=os.path.dirname(__file__)):
     suite = unittest.TestSuite()
     for name in os.listdir(directory):
+        if name.startswith('.'):
+            continue
         path = os.path.join(directory, name)
         if os.path.isfile(path) and name.startswith('test_'):
             submodule_name = os.path.splitext(name)[0]
@@ -15,6 +17,7 @@ def test_suite(package=__package__, directory=os.path.dirname(__file__)):
             suite.addTest(module_tests)
         elif os.path.isdir(path):
             package_name = "{0}.{1}".format(package, name)
+            print(package_name)
             __import__(package_name, level=0)
             package_tests = getattr(sys.modules[package_name], 'test_suite')()
             suite.addTest(package_tests)