diff --git a/Lib/logging/__init__.py b/Lib/logging/__init__.py
--- a/Lib/logging/__init__.py
+++ b/Lib/logging/__init__.py
@@ -61,8 +61,6 @@ __date__    = "07 February 2010"
 #
 if hasattr(sys, 'frozen'): #support for py2exe
     _srcfile = "logging%s__init__%s" % (os.sep, __file__[-4:])
-elif __file__[-4:].lower() in ['.pyc', '.pyo']:
-    _srcfile = __file__[:-4] + '.py'
 else:
     _srcfile = __file__
 _srcfile = os.path.normcase(_srcfile)
diff --git a/Lib/test/test_inspect.py b/Lib/test/test_inspect.py
--- a/Lib/test/test_inspect.py
+++ b/Lib/test/test_inspect.py
@@ -390,10 +390,8 @@ class TestBuggyCases(GetSourceBase):
     def test_method_in_dynamic_class(self):
         self.assertSourceEqual(mod2.method_in_dynamic_class, 95, 97)
 
-    @unittest.skipIf(
-        not hasattr(unicodedata, '__file__') or
-            unicodedata.__file__[-4:] in (".pyc", ".pyo"),
-        "unicodedata is not an external binary module")
+    @unittest.skipUnless(hasattr(unicodedata, '__file__'),
+                         "unicodedata is not an external binary module")
     def test_findsource_binary(self):
         self.assertRaises(IOError, inspect.getsource, unicodedata)
         self.assertRaises(IOError, inspect.findsource, unicodedata)