--- a/testing/web-platform/tests/tools/wptrunner/wptrunner/executors/reftest-wait.js
+++ b/testing/web-platform/tests/tools/wptrunner/wptrunner/executors/reftest-wait.js
@@ -1,10 +1,9 @@
 function test(x) {
-  log("classList: " + root.classList);
   if (!root.classList.contains("reftest-wait")) {
     observer.disconnect();
     marionetteScriptFinished();
   }
 }
 
 var root = document.documentElement;
 var observer = new MutationObserver(test);

--- a/testing/web-platform/tests/tools/wptrunner/wptrunner/executors/testharness_marionette.js
+++ b/testing/web-platform/tests/tools/wptrunner/wptrunner/executors/testharness_marionette.js
@@ -21,12 +21,11 @@ window.wrappedJSObject.addEventListener(
                               subtest_results]);
 }, false);
 
 window.wrappedJSObject.win = window.open("%(abs_url)s", "%(window_id)s");
 
 var timer = null;
 if (%(timeout)s) {
     timer = setTimeout(function() {
-        log("Timeout fired");
         window.wrappedJSObject.win.timeout();
     }, %(timeout)s);
 }