diff --git a/tests/bootstrap.php b/tests/bootstrap.php
index 229a6ee82b..2fc8858585 100644
--- a/tests/bootstrap.php
+++ b/tests/bootstrap.php
@@ -12,7 +12,7 @@
 */
 
 define('IN_PHPBB', true);
-define('PHPBB_ENVIRONMENT', 'production');
+define('PHPBB_ENVIRONMENT', 'development');
 
 $phpbb_root_path = 'phpBB/';
 $phpEx = 'php';
diff --git a/tests/controller/config/production/routing.yml b/tests/controller/config/development/routing.yml
similarity index 100%
rename from tests/controller/config/production/routing.yml
rename to tests/controller/config/development/routing.yml
diff --git a/tests/controller/ext/vendor2/bar/config/production/routing.yml b/tests/controller/ext/vendor2/bar/config/development/routing.yml
similarity index 100%
rename from tests/controller/ext/vendor2/bar/config/production/routing.yml
rename to tests/controller/ext/vendor2/bar/config/development/routing.yml
diff --git a/tests/di/fixtures/config/production/environment.yml b/tests/di/fixtures/config/development/environment.yml
similarity index 100%
rename from tests/di/fixtures/config/production/environment.yml
rename to tests/di/fixtures/config/development/environment.yml
diff --git a/tests/di/fixtures/ext/vendor/disabled/config/production/environment.yml b/tests/di/fixtures/ext/vendor/disabled/config/development/environment.yml
similarity index 100%
rename from tests/di/fixtures/ext/vendor/disabled/config/production/environment.yml
rename to tests/di/fixtures/ext/vendor/disabled/config/development/environment.yml
diff --git a/tests/di/fixtures/ext/vendor/enabled-2/config/production/environment.yml b/tests/di/fixtures/ext/vendor/enabled-2/config/development/environment.yml
similarity index 100%
rename from tests/di/fixtures/ext/vendor/enabled-2/config/production/environment.yml
rename to tests/di/fixtures/ext/vendor/enabled-2/config/development/environment.yml
diff --git a/tests/di/fixtures/other_config/production/environment.yml b/tests/di/fixtures/other_config/development/environment.yml
similarity index 100%
rename from tests/di/fixtures/other_config/production/environment.yml
rename to tests/di/fixtures/other_config/development/environment.yml
diff --git a/tests/pagination/config/production/routing.yml b/tests/pagination/config/development/routing.yml
similarity index 100%
rename from tests/pagination/config/production/routing.yml
rename to tests/pagination/config/development/routing.yml