Very slow CIs take longer on this test

--- a/jupyter_console/tests/test_console.py
+++ b/jupyter_console/tests/test_console.py
@@ -65,8 +65,8 @@
     except IOError:
         raise SkipTest("Couldn't find command %s" % cmd)
     
-    # timeout after one minute
-    t = 60
+    # timeout after 5 minutes
+    t = 300
     idx = p.expect(r'In \[\d+\]', timeout=t)
     return p, pexpect, t