diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 0766feb0..a19d9229 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -107,7 +107,7 @@ test_bullseye:
     - mkdir /usr/share/davical/testing/
     - cp testing/*.php /usr/share/davical/testing/
     - rm /etc/davical/config.php
-    - cp testing/regression-conf.php.example /etc/davical/regression-conf.php
+    - cat testing/regression-conf.php.example | sed 's.//$c->dbg.$c->dbg.' > /etc/davical/regression-conf.php
     - ln -s /etc/davical/regression-conf.php /etc/davical/mycaldav-conf.php
     - ln -s /etc/davical/regression-conf.php /etc/davical/myempty-conf.php
     - sed -i '/peer/d' /etc/postgresql/13/main/pg_hba.conf
@@ -184,7 +184,7 @@ test_buster_latestphp:
     - mkdir /usr/share/davical/testing/
     - cp testing/*.php /usr/share/davical/testing/
     - rm /etc/davical/config.php
-    - cp testing/regression-conf.php.example /etc/davical/regression-conf.php
+    - cat testing/regression-conf.php.example | sed 's.//$c->dbg.$c->dbg.' > /etc/davical/regression-conf.php
     - ln -s /etc/davical/regression-conf.php /etc/davical/mycaldav-conf.php
     - ln -s /etc/davical/regression-conf.php /etc/davical/myempty-conf.php
     - sed -i '/peer/d' /etc/postgresql/11/main/pg_hba.conf
@@ -235,7 +235,7 @@ test_stretch_latestphp:
     - mkdir /usr/share/davical/testing/
     - cp testing/*.php /usr/share/davical/testing/
     - rm /etc/davical/config.php
-    - cp testing/regression-conf.php.example /etc/davical/regression-conf.php
+    - cat testing/regression-conf.php.example | sed 's.//$c->dbg.$c->dbg.' > /etc/davical/regression-conf.php
     - ln -s /etc/davical/regression-conf.php /etc/davical/mycaldav-conf.php
     - ln -s /etc/davical/regression-conf.php /etc/davical/myempty-conf.php
     - sed -i '/peer/d' /etc/postgresql/9.6/main/pg_hba.conf