diff --git a/lib/helper/SeleniumWebdriver.js b/lib/helper/SeleniumWebdriver.js
index a8d9486e4..5813a6725 100644
--- a/lib/helper/SeleniumWebdriver.js
+++ b/lib/helper/SeleniumWebdriver.js
@@ -148,8 +148,7 @@ class SeleniumWebdriver extends Helper {
     if (this.options.keepCookies) return;
     // if browser should not be restarted
     this.debugSection('Session', 'cleaning cookies and localStorage');
-    this.browser.manage().deleteAllCookies();
-    return this.browser.executeScript('localStorage.clear();');
+    return Promise.all([this.browser.manage().deleteAllCookies(), this.browser.executeScript('localStorage.clear();')]);
   }
 
   _afterSuite() {
diff --git a/lib/helper/WebDriverIO.js b/lib/helper/WebDriverIO.js
index 551953344..87580f624 100644
--- a/lib/helper/WebDriverIO.js
+++ b/lib/helper/WebDriverIO.js
@@ -288,8 +288,7 @@ class WebDriverIO extends Helper {
     if (this.options.restart) return this.browser.end();
     if (this.options.keepCookies) return;
     this.debugSection('Session', 'cleaning cookies and localStorage');
-    this.browser.deleteCookie();
-    return this.browser.execute('localStorage.clear();');
+    return Promise.all([this.browser.deleteCookie(), this.browser.execute('localStorage.clear();')]);
   }
 
   _afterSuite() {