chore: fix integration tests

Refs: #943

packages/js/test/integration/test.js

@@ -443,11 +443,16 @@ describe('browser integration', function () {
   })
 
   it('sends user feedback for notice on submit', function (done) {
+    let apiKey;
+    let userFeedbackEndpoint;
     sandbox.style.display = 'block';
     sandbox.style.width = '800px';
     sandbox.style.height = '800px';
     sandbox
         .run(function () {
+          apiKey = Honeybadger.config.apiKey
+          userFeedbackEndpoint = Honeybadger.config.userFeedbackEndpoint
+
           Honeybadger.getUserFeedbackSubmitUrl = () => '/base/dist/browser/honeybadger-feedback-form.js'
 
           Honeybadger.afterNotify(() => {
@@ -474,9 +479,9 @@ describe('browser integration', function () {
             button.click()
 
             setTimeout(() => {
-              const feedbackSubmitUrl = Honeybadger.config.userFeedbackEndpoint +
+              const feedbackSubmitUrl = userFeedbackEndpoint +
                   '?format=js' +
-                  `&api_key=${Honeybadger.config.apiKey}` +
+                  `&api_key=${apiKey}` +
                   `&token=test` +
                   `&name=${encodeURIComponent(name.value)}` +
                   `&email=${encodeURIComponent(email.value)}` +