--- a/testing/talos/talos/startup_test/tspaint_test.html
+++ b/testing/talos/talos/startup_test/tspaint_test.html
@@ -8,22 +8,22 @@
 <!-- In-line this to avoid compilation. -->
 <script language="Javascript" type="text/javascript" src="chrome://talos-powers-content/content/TalosPowersContent.js"></script>
 <script language="Javascript" type="text/javascript" src="../scripts/MozillaFileLogger.js"></script>
 <script language="Javascript" type="text/javascript" src="chrome://talos-powers-content/content/TalosContentProfiler.js"></script>
 <script language="JavaScript" type="text/javascript" src="../tests/quit.js"></script>
 <script language="javascript" type="text/javascript">
 
 async function painted() {
+  window.removeEventListener("MozAfterPaint", painted, true);
+
   await TalosContentProfiler.pause();
   await TalosContentProfiler.initFromURLQueryParams(location.search);
   await TalosContentProfiler.finishStartupProfiling();
 
-  window.removeEventListener("MozAfterPaint", painted, true);
-
   let startupInfo = await TalosPowersContent.getStartupInfo();
 
   let startupTime = startupInfo['firstPaint'] - startupInfo['process'];
 
   document.body.textContent = 'Startup time = ' + startupTime + ' ms';
   if (window.dump) {
     dumpLog('__start_report' + startupTime + '__end_report\n\n');
   }