diff --git a/.scrutinizer.yml b/.scrutinizer.yml
index d95425d..8ab6470 100644
--- a/.scrutinizer.yml
+++ b/.scrutinizer.yml
@@ -7,7 +7,7 @@ build:
     coverage:
       tests:
         override:
-          - command: php vendor/bin/phpunit --coverage-clover coverage.xml
+          - command: XDEBUG_MODE=coverage php vendor/bin/phpunit --coverage-clover coverage.xml
             coverage:
               file: coverage.xml
               format: clover