diff --git a/.github/workflows/build_php71.yaml b/.github/workflows/build_php71.yaml
index 0e90e1171e56..25bcb282be3f 100644
--- a/.github/workflows/build_php71.yaml
+++ b/.github/workflows/build_php71.yaml
@@ -44,8 +44,7 @@ jobs:
             # Regenerating the autoload files will remove vendor/composer/platform_check.php, otherwise executing bin/rector on 7.1 fails
             -   run: composer dumpautoload
 
-            # Remove DEV dependencies
-            -   run: composer install --no-dev
+            -   run: composer install
 
             # Replace the composer.json file
             -   run: cp ci/downgrade/composer.json.after ./composer.json