diff --git a/tox.ini b/tox.ini
index a6ad6a04a8..79ea939b11 100644
--- a/tox.ini
+++ b/tox.ini
@@ -9,6 +9,7 @@ setenv = STATSD_HOST=127.0.0.1
          STATSD_PORT=8125
          VIRTUAL_ENV={envdir}
          OS_TEST_TIMEOUT=30
+passenv = ZUUL_TEST_ROOT
 usedevelop = True
 install_command = pip install {opts} {packages}
 deps = -r{toxinidir}/requirements.txt