diff --git a/tox.ini b/tox.ini
index 3c1524cd..2d4069ec 100644
--- a/tox.ini
+++ b/tox.ini
@@ -10,7 +10,7 @@ commands=
 
 [testenv:coveralls]
 passenv=TRAVIS TRAVIS_JOB_ID TRAVIS_BRANCH DEPENDENCY_INJECTOR_DEBUG_MODE
-basepython=python3.5
+basepython=python2.7
 usedevelop=True
 deps=
     {[testenv]deps}