Fatal error: Uncaught Error: Class "Illuminate\Tests\Notifications\Slack\TestCase" not found in /home/neftenergies/public_html/docroot.assets.neftenergies.com/snipe-it/vendor/laravel/slack-notification-channel/tests/Slack/Unit/Composites/PlainTextOnlyTextObjectTest.php:9 Stack trace: #0 {main} thrown in /home/neftenergies/public_html/docroot.assets.neftenergies.com/snipe-it/vendor/laravel/slack-notification-channel/tests/Slack/Unit/Composites/PlainTextOnlyTextObjectTest.php on line 9