FIX Ensure primary connection is updated with temporary database

src/TestSessionEnvironment.php

@@ -578,6 +578,10 @@ public function connectToDatabase($state = null)
  $this->oldDatabaseName = $databaseConfig['database'];
  $databaseConfig['database'] = $state->database;
  DB::connect($databaseConfig);
+ // This is required for CMS 5.4+
+ if (method_exists(DB::class, 'hasConfig') && DB::hasConfig('primary')) {
+ DB::connect($databaseConfig, 'primary');
+ }
  }
  }
  }