The usual
diff --git a/Lib/dos-8x3/test_sig.py b/Lib/dos-8x3/test_sig.py
index 2d33635..02b5dc3 100755
--- a/Lib/dos-8x3/test_sig.py
+++ b/Lib/dos-8x3/test_sig.py
@@ -1,11 +1,11 @@
 # Test the signal module
-from test_support import verbose
+from test_support import verbose, TestSkipped
 import signal
 import os
 import sys
 
 if sys.platform[:3] in ('win', 'os2'):
-    raise ImportError, "Can't test signal on %s" % sys.platform[:3]
+    raise TestSkipped, "Can't test signal on %s" % sys.platform[:3]
 
 if verbose:
 	x = '-x'