diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 060a235..9f8a436 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -23,7 +23,7 @@ synchro-et-tests:
     - rsync -avzlh * /home/webmaster/site-chalec.org/articles/
     - files=(git diff-tree --no-commit-id --name-only -r $CI_COMMIT_SHA)
     - cd /home/webmaster/site-chalec.org/articles
-    - for file in $files; do stl check $file | tee /dev/stderr | grep Err && false; done # return false if error is read in standard output
+    - for file in $files; do stl check $file | tee | grep Err && false; done # return false if error is read in standard output
 
 
 deploiement:      # This job runs in the deploy stage.