diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 340bd73..15a68c4 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -2,6 +2,8 @@
 cache:
   paths:
     - vendor/
+variables:
+  XDEBUG_MODE: coverage
 
 before_script:
   - apt-get update -yqq