diff --git a/tox.ini b/tox.ini
index bfdedd3..1701620 100644
--- a/tox.ini
+++ b/tox.ini
@@ -15,7 +15,8 @@ setenv = VIRTUAL_ENV={envdir}
 install_command = pip install -c{env:UPPER_CONSTRAINTS_FILE:https://git.openstack.org/cgit/openstack/requirements/plain/upper-constraints.txt} -U {opts} {packages}
 deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
-commands = python manage.py test {posargs}
+commands = rm -f .testrepository/times.dbm
+           python manage.py test {posargs}
 
 [testenv:pep8]
 commands = flake8 {posargs}