diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index ee5c71c6c35a00fc3b909fe11baf247adc936e07..3f8b66f8b7e14c925ea3bd55b2dfb9c4af46cfcf 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -7,7 +7,7 @@ before_script:
   - pip install wheel
   - pip install -r requirements.txt
   - cat /etc/apt/sources.list
-  - cat /etc/apt/sources.list.d/*
+  - ls /etc/apt/sources.list.d/
 
 stages:
   - test