diff --git a/.eslintrc.json b/.eslintrc.json
index c0bbf37d..e2d3ebf8 100755
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -40,7 +40,8 @@
       }
     ],
     "istanbul/no-ignore-file": "error",
-    "istanbul/prefer-ignore-reason": "error"
+    "istanbul/prefer-ignore-reason": "error",
+    "promise/no-callback-in-promise": "off"
   },
   "overrides": [
     {
diff --git a/package.json b/package.json
index 2a85b063..9a6a2b31 100644
--- a/package.json
+++ b/package.json
@@ -63,7 +63,7 @@
     "cover:browser-api:firefox:local": "scripts/cover.sh",
     "cover:browser-api:firefox:saucy": "scripts/cover.sh",
     "cover:browser-api:safari:local": "scripts/cover.sh",
-    ".cover:browser-api:safari:saucy": "scripts/cover.sh",
+    "cover:browser-api:safari:saucy": "scripts/cover.sh",
     "cover:browser-api": "scripts/for-all-browsers.sh",
     "cover": "scripts/cover-all.sh",
     "eslint-check": "eslint --print-config src/server/index.js | eslint-config-prettier-check",
diff --git a/src/test/clients/waychaser-via-webdriver.js b/src/test/clients/waychaser-via-webdriver.js
index 3dbf9edf..367b6ba6 100644
--- a/src/test/clients/waychaser-via-webdriver.js
+++ b/src/test/clients/waychaser-via-webdriver.js
@@ -5,19 +5,22 @@ import logging from 'selenium-webdriver/lib/logging';
 
 class WaychaserViaWebdriver {
   async load(url, options) {
-    const result = await this.driver.executeScript(
+    const result = await this.driver.executeAsyncScript(
       /* istanbul ignore next: won't work in browser otherwise */
       function () {
         /* global window */
+        var callback = arguments[arguments.length - 1];
         return window.waychaser
           .load(arguments[0], arguments[1])
           .then((success) => {
             console.log({ success });
-            return { success, result: 'success' };
+            callback({ success, result: 'success' });
+            return;
           })
           .catch((error) => {
             console.log({ error });
-            return { error, result: 'error' };
+            callback({ error, result: 'error' });
+            return;
           });
       },
       url,