We're hitting the following error when attempting to run hooks validations within Antithesis: 

(function() { Timestamp.prototype.toString = function()

{ throw new Error("Cannot toString timestamps. Consider using timestampCmp() for comparison or tojson(<variable>) for output."); }

})() mongodb://mongos0:20009,mongos1:20010 jstests/concurrency/fsm_libs/resmoke_runner.js 

Full log attached. Link to Antithesis report with failing hooks: