Launch Tandem if it has not been launched already, so that phetioAPIValidation can run, see https://github.com/phetsims/scenery/issues/1046
Launch Tandem if it has not been launched already, so that phetioAPIValidation can run, see https://github.com/phetsims/scenery/issues/1046

phetsims/scenery,phetsims/scenery,phetsims/scenery