Update html/tTraceTest8.js

html/tTraceTest8.js

-/******************** 
+/******************** 
  * Ttracetest8 Test *
  ********************/
 
@@ -1618,6 +1618,9 @@ function trialRoutineEnd(trials) {
     
     // the Routine "trial" was not non-slip safe, so reset the non-slip timer
     routineTimer.reset();
+
+    line.setAutoDraw(false);
+    win.flip();
     
     return Scheduler.Event.NEXT;
   };