Don't restart timeout timer when 'timeout' is emitted

It can take longer for workers to exit than the timeout period, in which
case restarting the timeout timer just causes it to fire again.

Author: novemberborn

api.js

@@ -98,8 +98,10 @@ class Api extends Emittery {
 				}
 
 				runStatus.on('stateChange', record => {
-					// Restart the timer whenever there is activity.
-					restartTimer();
+					if (record.type !== 'timeout') {
+						// Restart the timer whenever there is non-timeout activity.
+						restartTimer();
+					}
 
 					if (failFast && (record.type === 'hook-failed' || record.type === 'test-failed' || record.type === 'worker-failed')) {
 						// Prevent new test files from running once a test has failed.