Cleanup some test cases using check_warnings and check_py3k_warnings.
diff --git a/Lib/test/test_structmembers.py b/Lib/test/test_structmembers.py
index d1b33a1..56024fa 100644
--- a/Lib/test/test_structmembers.py
+++ b/Lib/test/test_structmembers.py
@@ -65,39 +65,30 @@
 
 
 class TestWarnings(unittest.TestCase):
-    def has_warned(self, w):
-        self.assertEqual(w.category, RuntimeWarning)
 
     def test_byte_max(self):
-        with test_support.check_warnings() as w:
+        with test_support.check_warnings(('', RuntimeWarning)):
             ts.T_BYTE = CHAR_MAX+1
-            self.has_warned(w)
 
     def test_byte_min(self):
-        with test_support.check_warnings() as w:
+        with test_support.check_warnings(('', RuntimeWarning)):
             ts.T_BYTE = CHAR_MIN-1
-            self.has_warned(w)
 
     def test_ubyte_max(self):
-        with test_support.check_warnings() as w:
+        with test_support.check_warnings(('', RuntimeWarning)):
             ts.T_UBYTE = UCHAR_MAX+1
-            self.has_warned(w)
 
     def test_short_max(self):
-        with test_support.check_warnings() as w:
+        with test_support.check_warnings(('', RuntimeWarning)):
             ts.T_SHORT = SHRT_MAX+1
-            self.has_warned(w)
 
     def test_short_min(self):
-        with test_support.check_warnings() as w:
+        with test_support.check_warnings(('', RuntimeWarning)):
             ts.T_SHORT = SHRT_MIN-1
-            self.has_warned(w)
 
     def test_ushort_max(self):
-        with test_support.check_warnings() as w:
+        with test_support.check_warnings(('', RuntimeWarning)):
             ts.T_USHORT = USHRT_MAX+1
-            self.has_warned(w)
-
 
 
 def test_main(verbose=None):