diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d34901e7844..ec0263a68c8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -65,7 +65,9 @@ jobs:
              unzip -d /tmp/phpunit-7.5-fork /tmp/phpunit-7.5-fork.zip
              composer bin phpunit config --unset platform
              composer bin phpunit config repositories.0 '{"type": "path", "url": "/tmp/phpunit-7.5-fork/phpunit-add-compatibility-with-php8-to-phpunit-7", "options": {"symlink": false}}'
-             composer bin phpunit require --dev -W phpunit/phpunit:@dev --ignore-platform-reqs    
+             composer bin phpunit require --dev -W phpunit/phpunit:@dev --ignore-platform-reqs
+             rm -rf ./vendor/phpunit/
+             composer dump-autoload
            fi
 
       - name: Init DB and WP
diff --git a/.github/workflows/pr-unit-tests.yml b/.github/workflows/pr-unit-tests.yml
index 5823b209c24..06452e8adcc 100644
--- a/.github/workflows/pr-unit-tests.yml
+++ b/.github/workflows/pr-unit-tests.yml
@@ -62,7 +62,9 @@ jobs:
              unzip -d /tmp/phpunit-7.5-fork /tmp/phpunit-7.5-fork.zip
              composer bin phpunit config --unset platform
              composer bin phpunit config repositories.0 '{"type": "path", "url": "/tmp/phpunit-7.5-fork/phpunit-add-compatibility-with-php8-to-phpunit-7", "options": {"symlink": false}}'
-             composer bin phpunit require --dev -W phpunit/phpunit:@dev --ignore-platform-reqs    
+             composer bin phpunit require --dev -W phpunit/phpunit:@dev --ignore-platform-reqs
+             rm -rf ./vendor/phpunit/
+             composer dump-autoload
            fi
 
       - name: Init DB and WP