diff --git a/tox.ini b/tox.ini
index 08e723527af..32639098f0c 100644
--- a/tox.ini
+++ b/tox.ini
@@ -33,7 +33,8 @@ commands =
 commands = python ./tools/check_i18n.py ./quantum ./tools/i18n_cfg.py
 
 [testenv:cover]
-setenv = NOSE_WITH_COVERAGE=1
+setenv = VIRTUAL_ENV={envdir}
+         NOSE_WITH_COVERAGE=1
 
 [testenv:venv]
 commands = {posargs}