It makes more sense to call resetwarnings() after every test runs than

to keep doing that in every test that wants to filter a warning.

Lib/test/regrtest.py

@@ -55,6 +55,7 @@ import getopt
 import traceback
 import random
 import StringIO
+import warnings
 
 import test_support
 
@@ -322,6 +323,7 @@ def runtest(test, generate, verbose, quiet, testdir = None):
                 indirect_test()
         finally:
             sys.stdout = save_stdout
+            warnings.resetwarnings()
     except (ImportError, test_support.TestSkipped), msg:
         if not quiet:
             print "test", test, "skipped --", msg