Fix atexit tests.

Author: ZeroIntensity

Lib/test/test_threading.py

@@ -2397,6 +2397,7 @@ def test_atexit_called_once(self):
 
         self.assertFalse(err)
 
+    @force_not_colorized
     def test_atexit_after_shutdown(self):
         # The only way to do this is by registering an atexit within
         # an atexit, which is intended to raise an exception.