Issue #5080: turn the DeprecationWarning from float arguments passed
to integer PyArg_Parse* format codes into a TypeError.  Add a
DeprecationWarning for floats passed with the 'L' format code, which
didn't previously have a warning.
diff --git a/Lib/test/test_os.py b/Lib/test/test_os.py
index 207963e..ec9b970 100644
--- a/Lib/test/test_os.py
+++ b/Lib/test/test_os.py
@@ -502,11 +502,9 @@
             self.assertEqual(len(os.urandom(100)), 100)
             self.assertEqual(len(os.urandom(1000)), 1000)
             # see http://bugs.python.org/issue3708
-            with test_support.check_warnings():
-                # silence deprecation warnings about float arguments
-                self.assertEqual(len(os.urandom(0.9)), 0)
-                self.assertEqual(len(os.urandom(1.1)), 1)
-                self.assertEqual(len(os.urandom(2.0)), 2)
+            self.assertRaises(TypeError, os.urandom, 0.9)
+            self.assertRaises(TypeError, os.urandom, 1.1)
+            self.assertRaises(TypeError, os.urandom, 2.0)
         except NotImplementedError:
             pass