diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 171b7f3..84987d6 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,5 +1,8 @@
 name: CI
 
+env:
+  XDEBUG_MODE: 'coverage'
+
 on:
   push:
   pull_request: