diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 18a8bd38831a4909bfaec6dc70859f49b4c85790..465fbaea187c824fcfe3738b3b45faee6fbb0c43 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,3 +1,3 @@
 test:
   script:
-    docker run -v$(pwd):/work etsiforge/r2d "/bin/sh" -c "cd /work/robot2doc && python3 -m pytest"
\ No newline at end of file
+    docker run -v$(pwd):/work:ro etsiforge/r2d "/bin/sh" -c "cd /work/robot2doc && python3 -m pytest"
\ No newline at end of file