convert usage of fail* to assert*
diff --git a/Lib/test/test_xrange.py b/Lib/test/test_xrange.py
index 7e2a1a3..a0b94fa 100644
--- a/Lib/test/test_xrange.py
+++ b/Lib/test/test_xrange.py
@@ -26,18 +26,18 @@
         self.assertEqual(list(xrange(a+4, a, -2)), [a+4, a+2])
 
         seq = list(xrange(a, b, c))
-        self.assert_(a in seq)
-        self.assert_(b not in seq)
+        self.assertTrue(a in seq)
+        self.assertTrue(b not in seq)
         self.assertEqual(len(seq), 2)
 
         seq = list(xrange(b, a, -c))
-        self.assert_(b in seq)
-        self.assert_(a not in seq)
+        self.assertTrue(b in seq)
+        self.assertTrue(a not in seq)
         self.assertEqual(len(seq), 2)
 
         seq = list(xrange(-a, -b, -c))
-        self.assert_(-a in seq)
-        self.assert_(-b not in seq)
+        self.assertTrue(-a in seq)
+        self.assertTrue(-b not in seq)
         self.assertEqual(len(seq), 2)
 
         self.assertRaises(TypeError, xrange)