diff -r ade45000c534 Lib/test/test_warnings.py
--- a/Lib/test/test_warnings.py	Fri Apr 30 06:53:58 2010 -0400
+++ b/Lib/test/test_warnings.py	Fri Apr 30 06:59:45 2010 -0400
@@ -82,6 +82,16 @@
             self.assertRaises(UserWarning, self.module.warn,
                                 "FilterTests.test_error")
 
+    def test_error_after_default(self):
+        with original_warnings.catch_warnings(module=self.module) as w:
+            self.module.resetwarnings()
+            message = "FilterTests.test_ignore_after_default"
+            def f():
+                self.module.warn(message, UserWarning)
+            f()
+            self.module.filterwarnings("error", category=UserWarning)
+            self.assertRaises(UserWarning, f)
+
     def test_ignore(self):
         with original_warnings.catch_warnings(record=True,
                 module=self.module) as w:
@@ -90,6 +100,18 @@
             self.module.warn("FilterTests.test_ignore", UserWarning)
             self.assertEqual(len(w), 0)
 
+    def test_ignore_after_default(self):
+        with original_warnings.catch_warnings(record=True,
+                module=self.module) as w:
+            self.module.resetwarnings()
+            message = "FilterTests.test_ignore_after_default"
+            def f():
+                self.module.warn(message, UserWarning)
+            f()
+            self.module.filterwarnings("ignore", category=UserWarning)
+            f()
+            self.assertEqual(len(w), 1)
+
     def test_always(self):
         with original_warnings.catch_warnings(record=True,
                 module=self.module) as w:
@@ -103,6 +125,23 @@
             self.assertEqual(len(w), 2)
             self.assertEqual(w[-1].message.args[0], message)
 
+    def test_always_after_default(self):
+        with original_warnings.catch_warnings(record=True,
+                module=self.module) as w:
+            self.module.resetwarnings()
+            message = "FilterTests.test_always_after_ignore"
+            def f():
+                self.module.warn(message, UserWarning)
+            f()
+            self.assertEqual(len(w), 1)
+            self.assertEqual(w[-1].message.args[0], message)
+            f()
+            self.assertEqual(len(w), 1)
+            self.module.filterwarnings("always", category=UserWarning)
+            f()
+            self.assertEqual(len(w), 2)
+            self.assertEqual(w[-1].message.args[0], message)
+
     def test_default(self):
         with original_warnings.catch_warnings(record=True,
                 module=self.module) as w: