1 files changed, 1 insertions, 0 deletions

diff --git a/tox.ini b/tox.ini
index 9d45b0c7..dc85bc6d 100644
--- a/tox.ini
+++ b/tox.ini
@@ -8,6 +8,7 @@ passenv =
     DOCKER_HOST
     DOCKER_CERT_PATH
     DOCKER_TLS_VERIFY
+    DOCKER_VERSION
 setenv =
     HOME=/tmp
 deps =