diff --git a/tox.ini b/tox.ini
index 13a7b9d..7538965 100644
--- a/tox.ini
+++ b/tox.ini
@@ -27,7 +27,7 @@ commands = {toxinidir}/tools/clean.sh {toxinidir}/falcon
 whitelist_externals = bash
                       mv
 commands = {toxinidir}/tools/clean.sh {toxinidir}/falcon
-           nosetests --with-coverage
+           nosetests --with-coverage []
            bash -c "if [ ! -d .coverage_data ]; then mkdir .coverage_data; fi"
            mv {toxinidir}/.coverage {toxinidir}/.coverage_data/.coverage.{envname}