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

Lib/test/test___all__.py

@@ -158,5 +158,3 @@ check_all("weakref")
 check_all("webbrowser")
 check_all("xdrlib")
 check_all("zipfile")
-
-warnings.resetwarnings()

Lib/test/test_coercion.py

@@ -113,8 +113,5 @@ def do_prefix_binops():
 warnings.filterwarnings("ignore",
                         r'complex divmod\(\), // and % are deprecated',
                         DeprecationWarning)
-try:
 do_infix_binops()
 do_prefix_binops()
-finally:
-    warnings.resetwarnings()

Lib/test/test_xmllib.py

@@ -32,8 +32,6 @@ class XMLParserTestCase(unittest.TestCase):
 
 def test_main():
     test_support.run_unittest(XMLParserTestCase)
-    warnings.resetwarnings()
-
 
 if __name__ == "__main__":
     test_main()