tweak tox.ini to pass tests

Erdenezul Batmunkh · Erdenezul Batmunkh · commit ae783d4f45bc · 2018-07-16T17:25:29.000+08:00
diff --git a/tox.ini b/tox.ini
@@ -7,6 +7,6 @@ commands =
 deps =
     nose
     mg35: PyMongo==3.5
-    mg3x: PyMongo>=3.0
+    mg3x: PyMongo>=3.0,<3.7
 setenv =
     PYTHON_EGG_CACHE = {envdir}/python-eggs
