diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 5eafe3e9e3..3f51510548 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -207,6 +207,8 @@ check-doc-trytond:
 
 check-trytond-rng:
   extends: .check
+  variables:
+    PIP_CACHE_DIR: "$CI_PROJECT_DIR/.cache/pip"
   cache:
     paths:
       - .cache/pip/http