diff --git a/.travis.yml b/.travis.yml
index 9600703b..c586dda5 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -11,6 +11,7 @@ python:
 - pypy
 - pypy3
 
+# Test on PyMongo v2.7.x, v2.8.x, and v3.x
 env:
 - PYMONGO=2.7
 - PYMONGO=2.8
diff --git a/tox.ini b/tox.ini
index 1c0bc9bf..8278ee75 100644
--- a/tox.ini
+++ b/tox.ini
@@ -7,7 +7,7 @@ commands =
 deps =
     nose
     mg27: PyMongo<2.8
-    mg28: PyMongo>=2.8,<3.0
+    mg28: PyMongo>=2.8,<2.9
     mg30: PyMongo>=3.0
 setenv =
     PYTHON_EGG_CACHE = {envdir}/python-eggs