rename function -> serial_for_url
diff --git a/pyserial/examples/test_iolib.py b/pyserial/examples/test_iolib.py
index 8c03a86..5bcaed3 100644
--- a/pyserial/examples/test_iolib.py
+++ b/pyserial/examples/test_iolib.py
@@ -55,7 +55,7 @@
 class Test_SerialAndIO(unittest.TestCase):
 
     def setUp(self):
-        self.s = serial.serial_class_for_url(PORT, timeout=1)
+        self.s = serial.serial_for_url(PORT, timeout=1)
         self.io = io.TextIOWrapper(io.BufferedRWPair(self.s, self.s))
 
     def tearDown(self):