diff --git a/test/test.js b/test/test.js
index 1e30ae5..3a19cff 100644
--- a/test/test.js
+++ b/test/test.js
@@ -45,59 +45,69 @@ describe('Application life cycle test', function () {
     var TEST_TIMEOUT = 10000;
     var app;
 
-    function exists(selector, callback) {
-        return browser.wait(until.elementLocated(selector), TEST_TIMEOUT).then(function () {
-            callback();
-        });
+    function exists(selector) {
+        return browser.wait(until.elementLocated(selector), TEST_TIMEOUT);
     }
 
     function visible(selector, callback) {
-        exists(selector, function () {
-            browser.wait(until.elementIsVisible(browser.findElement(selector)), TEST_TIMEOUT).then(function () {
-                callback();
-            });
+        return exists(selector).then(function () {
+            return browser.wait(until.elementIsVisible(browser.findElement(selector)), TEST_TIMEOUT);
         });
     }
 
     function login(callback) {
-        browser.manage().deleteAllCookies();
-        browser.get('https://' + app.fqdn);
-
-        visible(by.id('loginButton'), function () {
-            browser.findElement(by.id('username')).sendKeys(username);
-            browser.findElement(by.id('passwordPlain')).sendKeys(password);
-            browser.findElement(by.id('loginButton')).click();
-            browser.wait(until.elementLocated(by.id('dropdown-configure')), TEST_TIMEOUT).then(function () { callback(); });
+        browser.manage().deleteAllCookies().then(function () {
+            return browser.get('https://' + app.fqdn);
+        }).then(function () {
+            return visible(by.id('loginButton'));
+        }).then(function () {
+            return browser.findElement(by.id('username')).sendKeys(username);
+        }).then(function () {
+            return browser.findElement(by.id('passwordPlain')).sendKeys(password);
+        }).then(function () {
+            return browser.findElement(by.id('loginButton')).click();
+        }).then(function () {
+            return browser.wait(until.elementLocated(by.id('dropdown-configure')), TEST_TIMEOUT);
+        }).then(function () {
+            callback();
         });
     }
 
     function logout(callback) {
         var logout_btn = by.xpath('//ul[@class="dropdown-menu"]/li/a[@class="signout"]');
 
-        browser.get('https://' + app.fqdn);
-
-        visible(by.id('stream'), function () {
-            browser.findElement(by.className('dropdown-toggle')).click();
-            visible(logout_btn, function () {
-                browser.findElement(logout_btn).click();
-
-                browser.wait(until.elementLocated(by.id('loginButton')), TEST_TIMEOUT).then(function () { callback(); });
-            });
+        browser.get('https://' + app.fqdn).then(function () {
+            return visible(by.id('stream'));
+        }).then(function () {
+            return browser.findElement(by.className('dropdown-toggle')).click();
+        }).then(function () {
+            return visible(logout_btn);
+        }).then(function () {
+            return browser.findElement(logout_btn).click();
+        }).then(function () {
+            return browser.wait(until.elementLocated(by.id('loginButton')), TEST_TIMEOUT);
+        }).then(function () {
+            callback();
         });
     }
 
     function addSubscription(callback) {
         var url = "https://cloudron.io/blog/rss.xml";
 
-        browser.get('https://' + app.fqdn);
-
-        visible(by.id('stream'), function () {
-            browser.findElement(by.xpath('//a[@href=".?c=subscription"]')).click();
-            visible(by.id('add_rss'), function () {
-                browser.findElement(by.xpath('//input[@name="url_rss"]')).sendKeys(url);
-                browser.findElement(by.xpath('//form[@id="add_rss"]/div/button[@type="submit"]')).click();
-                visible(by.xpath('//div[@id="notification" and @class="notification good"]'), function() { callback(); });
-            });
+        browser.get('https://' + app.fqdn).then(function () {
+            return visible(by.id('stream'));
+        }).then(function () {
+            return browser.findElement(by.xpath('//a[@href=".?c=subscription"]')).click();
+        }).then(function () {
+            return visible(by.id('add_rss'));
+        }).then(function () {
+            return browser.findElement(by.xpath('//input[@name="url_rss"]')).sendKeys(url);
+        }).then(function () {
+            return browser.findElement(by.xpath('//form[@id="add_rss"]/div/button[@type="submit"]')).click();
+        }).then(function () {
+            return visible(by.xpath('//div[@id="notification" and @class="notification good"]'));
+        }).then(function () {
+            callback();
         });
     }
 
@@ -105,19 +115,26 @@ describe('Application life cycle test', function () {
         var test_username = 'test';
         var manage_users_btn = by.xpath('//a[@href=".?c=user&a=manage"]');
 
-        browser.get('https://' + app.fqdn);
-
-        visible(by.id('stream'), function () {
-            browser.findElement(by.className('dropdown-toggle')).click();
-            visible(manage_users_btn, function () {
-                browser.findElement(manage_users_btn).click();
-                visible(by.id('new_user_name'), function () {
-                    browser.findElement(by.id('new_user_name')).sendKeys(test_username);
-                    browser.findElement(by.id('new_user_passwordPlain')).sendKeys(password);
-                    browser.findElement(by.xpath('//form[@action=".?c=user&a=create"]/div/div/button[@type="submit"]')).click();
-                    visible(by.xpath('//div[@id="notification" and @class="notification good"]'), function() { callback(); });
-                });
-            });
+        browser.get('https://' + app.fqdn).then(function () {
+            return visible(by.id('stream'));
+        }).then(function () {
+            return browser.findElement(by.className('dropdown-toggle')).click();
+        }).then(function () {
+            return visible(manage_users_btn);
+        }).then(function () {
+            return browser.findElement(manage_users_btn).click();
+        }).then(function () {
+            return visible(by.id('new_user_name'));
+        }).then(function () {
+            return browser.findElement(by.id('new_user_name')).sendKeys(test_username);
+        }).then(function () {
+            return browser.findElement(by.id('new_user_passwordPlain')).sendKeys(password);
+        }).then(function () {
+            return browser.findElement(by.xpath('//form[@action=".?c=user&a=create"]/div/div/button[@type="submit"]')).click();
+        }).then(function () {
+            return visible(by.xpath('//div[@id="notification" and @class="notification good"]'));
+        }).then(function () {
+            callback();
         });
     }
 
@@ -126,12 +143,16 @@ describe('Application life cycle test', function () {
             return browser.findElement(by.id('api_enabled')).click();
         }).then(function () {
             return browser.findElement(by.xpath('//form[@action=".?c=auth"]')).submit();
-        }).then(callback);
+        }).then(function () {
+            callback();
+        });
     }
 
     function checkApiConfiguration(callback) {
         browser.get('https://' + app.fqdn + '/p/api/greader.php/check%2Fcompatibility').then(function () {
-            exists(by.xpath('//pre[text()="PASS"]'), callback);
+            return exists(by.xpath('//pre[text()="PASS"]'));
+        }).then(function () {
+            callback();
         });
     }
 
@@ -142,9 +163,11 @@ describe('Application life cycle test', function () {
     }
 
     function subscriptionExists(callback) {
-        browser.get('https://' + app.fqdn + '/p/i/?get=c_1');
-
-        visible(by.xpath('//a[text()="Cloudron.io"]'), callback);
+        browser.get('https://' + app.fqdn + '/p/i/?get=c_1').then(function () {
+            return visible(by.xpath('//a[text()="Cloudron.io"]'));
+        }).then(function () {
+            callback();
+        });
     }
 
     function getStaticExtensionFile(callback) {