Raise statement normalization in Lib/test/.
diff --git a/Lib/test/test_openpty.py b/Lib/test/test_openpty.py
index cc9e907..f935496 100644
--- a/Lib/test/test_openpty.py
+++ b/Lib/test/test_openpty.py
@@ -4,7 +4,7 @@
 from test.test_support import run_unittest, TestSkipped
 
 if not hasattr(os, "openpty"):
-    raise TestSkipped, "No openpty() available."
+    raise TestSkipped("No openpty() available.")
 
 
 class OpenptyTest(unittest.TestCase):