diff --git a/sdk/cosmos/azure-cosmos/tox.ini b/sdk/cosmos/azure-cosmos/tox.ini
index 4de20e13f2b5..5c1604df1cf3 100644
--- a/sdk/cosmos/azure-cosmos/tox.ini
+++ b/sdk/cosmos/azure-cosmos/tox.ini
@@ -7,7 +7,8 @@
 envlist = py27, py34
 
 [base]
-deps = pytest, -rdev_requirements.txt
+deps = pytest
+       -rdev_requirements.txt
 
 [pytest]
 python_files=test/**.py