convert old fail* assertions to assert*
diff --git a/Lib/test/test_grp.py b/Lib/test/test_grp.py
index 1c1f75f..765b4b6 100755
--- a/Lib/test/test_grp.py
+++ b/Lib/test/test_grp.py
@@ -12,13 +12,13 @@
         # attributes promised by the docs
         self.assertEqual(len(value), 4)
         self.assertEqual(value[0], value.gr_name)
-        self.assert_(isinstance(value.gr_name, str))
+        self.assertTrue(isinstance(value.gr_name, str))
         self.assertEqual(value[1], value.gr_passwd)
-        self.assert_(isinstance(value.gr_passwd, str))
+        self.assertTrue(isinstance(value.gr_passwd, str))
         self.assertEqual(value[2], value.gr_gid)
-        self.assert_(isinstance(value.gr_gid, int))
+        self.assertTrue(isinstance(value.gr_gid, int))
         self.assertEqual(value[3], value.gr_mem)
-        self.assert_(isinstance(value.gr_mem, list))
+        self.assertTrue(isinstance(value.gr_mem, list))
 
     def test_values(self):
         entries = grp.getgrall()