diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index cad4c5581aeb781396583b636f3811ce2d9afc1d..5e54ad156d4279d0bba424c9ee36aeff2548dc19 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -27,6 +27,7 @@ run-tox-pipeline:
     PIP_CACHE_DIR: "$CI_PROJECT_DIR/.cache/pip"
 
   cache:
+    key: tox-virtualenv
     paths:
       - .cache/pip
       - venv/