diff --git a/tox.ini b/tox.ini
index b65ef99bb..7d365b39b 100644
--- a/tox.ini
+++ b/tox.ini
@@ -12,6 +12,7 @@ setenv = VIRTUAL_ENV={envdir}
 passenv = http_proxy HTTP_PROXY https_proxy HTTPS_PROXY no_proxy NO_PROXY
 deps = -r{toxinidir}/test-requirements.txt
 commands =
+  rm -f .testrepository
   find . -type f -name "*.pyc" -delete
   python setup.py testr --slowest --testr-args='{posargs}'
 whitelist_externals =