diff --git a/tests/unit/test_console.py b/tests/unit/test_console.py
index 965a8debc..287a69326 100644
--- a/tests/unit/test_console.py
+++ b/tests/unit/test_console.py
@@ -24,6 +24,14 @@
 
 
 class TestConsole(unittest.TestCase):
+    @classmethod
+    def setUpClass(cls):
+        cls.open = tty_netconf.open
+
+    @classmethod
+    def tearDownClass(cls):
+        tty_netconf.open = cls.open
+
     @patch("jnpr.junos.transport.tty_telnet.Telnet._tty_open")
     @patch("jnpr.junos.transport.tty_telnet.telnetlib.Telnet.expect")
     @patch("jnpr.junos.transport.tty_telnet.Telnet.write")