diff --git a/tests/di/fixtures/config/production/container/environment.yml b/tests/di/fixtures/config/production/container/environment.yml
index 8281d9e941..ba6b679795 100644
--- a/tests/di/fixtures/config/production/container/environment.yml
+++ b/tests/di/fixtures/config/production/container/environment.yml
@@ -19,6 +19,11 @@ services:
     ext.manager:
         class: phpbb\extension\manager_mock
 
+    config:
+        class: phpbb\config\config
+        arguments:
+            - []
+
     template.twig.environment:
         class: Exception
         arguments:
diff --git a/tests/di/fixtures/config/test/container/environment.yml b/tests/di/fixtures/config/test/container/environment.yml
index 252117dd32..97ebe4aee1 100644
--- a/tests/di/fixtures/config/test/container/environment.yml
+++ b/tests/di/fixtures/config/test/container/environment.yml
@@ -16,6 +16,11 @@ services:
     dispatcher:
         class: phpbb\db\driver\container_mock
 
+    config:
+        class: phpbb\config\config
+        arguments:
+            - []
+
     template.twig.environment:
         class: Exception
         arguments:
diff --git a/tests/di/fixtures/other_config/production/container/environment.yml b/tests/di/fixtures/other_config/production/container/environment.yml
index c0d2f87bab..aeb552eeb7 100644
--- a/tests/di/fixtures/other_config/production/container/environment.yml
+++ b/tests/di/fixtures/other_config/production/container/environment.yml
@@ -19,6 +19,11 @@ services:
     ext.manager:
         class: phpbb\extension\manager_mock
 
+    config:
+        class: phpbb\config\config
+        arguments:
+            - []
+
     template.twig.environment:
         class: Exception
         arguments: