--- a/testing/talos/talos/tests/devtools/addon/content/damp.js
+++ b/testing/talos/talos/tests/devtools/addon/content/damp.js
@@ -309,18 +309,18 @@ Damp.prototype = {
   },
 
   async reloadPageAndLog(name, onReload) {
     dump("Reload page on '" + name + "'\n");
     let {time} = await this.reloadPage(onReload);
     this._results.push({name: name + ".reload.DAMP", value: time });
   },
 
-  async _coldInspectorOpen(url) {
-    await this.testSetup(url);
+  async _coldInspectorOpen() {
+    await this.testSetup(SIMPLE_URL);
     await this.openToolboxAndLog("cold.inspector", "inspector");
     await this.closeToolbox();
     await this.testTeardown();
   },
 
   _getToolLoadingTests(url, label, { expectedMessages, expectedSources }) {
     let subtests = {
       inspectorOpen: Task.async(function* () {