diff --git a/tox.ini b/tox.ini
index e9ff9ae..25aed17 100644
--- a/tox.ini
+++ b/tox.ini
@@ -17,6 +17,8 @@ passenv = http_proxy HTTP_PROXY https_proxy HTTPS_PROXY no_proxy NO_PROXY
 
 [testenv:cover]
 basepython = python3
+setenv =
+    PACKAGE_NAME=sahara
 commands = {toxinidir}/tools/cover.sh {posargs}
 
 [testenv:debug-py27]