Fatal error: Uncaught Error: Class 'Google\Cloud\Core\Testing\Snippet\SnippetTestCase' not found in /home/app/htdocs/lidia/vendor/google/cloud/tests/snippets/Spanner/InstanceTest.php:38 Stack trace: #0 {main} thrown in /home/app/htdocs/lidia/vendor/google/cloud/tests/snippets/Spanner/InstanceTest.php on line 38