convert usage of fail* to assert*
diff --git a/Lib/test/test_py3kwarn.py b/Lib/test/test_py3kwarn.py
index 7c25980..36c988f 100644
--- a/Lib/test/test_py3kwarn.py
+++ b/Lib/test/test_py3kwarn.py
@@ -317,7 +317,7 @@
             try:
                 __import__(module_name, level=0)
             except DeprecationWarning as exc:
-                self.assert_(module_name in exc.args[0],
+                self.assertTrue(module_name in exc.args[0],
                              "%s warning didn't contain module name"
                              % module_name)
             except ImportError: