diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index dd82cdc..09052d5 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -133,7 +133,7 @@ test:
   script:
     - composer update
     - vendor/bin/phpunit --migrate-configuration || true
-    - vendor/bin/phpunit --coverage-text --colors=never --coverage-cobertura=phpunitresult/cobertura-coverage.xml --log-junit=phpunitresult/junit.xml $EXCLUDE_GROUP
+    - XDEBUG_MODE=coverage vendor/bin/phpunit --coverage-text --colors=never --coverage-cobertura=phpunitresult/cobertura-coverage.xml --log-junit=phpunitresult/junit.xml $EXCLUDE_GROUP
     - sed -i 's~ filename="~ filename="src/~' phpunitresult/cobertura-coverage.xml
   coverage:  '/^\s*Lines:\s*\d+.\d+\%/'
   artifacts: