diff --git a/RoboFile.php b/RoboFile.php
index 23b03e7ad5..ba87ac7647 100644
--- a/RoboFile.php
+++ b/RoboFile.php
@@ -166,7 +166,6 @@ class RoboFile extends \Robo\Tasks {
 
   function testCoverage($opts=['file' => null, 'xml' => false]) {
     $this->loadEnv();
-    $this->_exec('vendor/bin/codecept build -c codeception.unit.yml');
     $command = join(' ', array(
       'vendor/bin/codecept run unit -c codeception.unit.yml ',
       (($opts['file']) ? $opts['file'] : ''),
diff --git a/composer.json b/composer.json
index 5dd4db90b2..497b08ae23 100644
--- a/composer.json
+++ b/composer.json
@@ -20,7 +20,7 @@
   },
   "require-dev": {
     "codeception/aspect-mock": "^2.0",
-    "codeception/codeception": "2.2.11",
+    "codeception/codeception": "2.3.5",
     "codeception/verify": "^0.3.3",
     "consolidation/robo": "^1.0.5",
     "henrikbjorn/lurker": "^1.2",
diff --git a/composer.lock b/composer.lock
index 0724b58a4b..0d17c009e8 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
         "This file is @generated automatically"
     ],
-    "content-hash": "f24637851f65aaddf31f499e9512a62a",
+    "content-hash": "3c6a5b45c2c80ffa51e3faa28d218aba",
     "packages": [
         {
             "name": "cerdic/css-tidy",
@@ -951,28 +951,28 @@
         },
         {
             "name": "codeception/codeception",
-            "version": "2.2.11",
+            "version": "2.3.5",
             "source": {
                 "type": "git",
                 "url": "https://github.com/Codeception/Codeception.git",
-                "reference": "a8681b416921ae282ccca2c485d75a3ed6756080"
+                "reference": "e807cd458eb9f7ae7464f33ad835a2f54aa73194"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/Codeception/Codeception/zipball/a8681b416921ae282ccca2c485d75a3ed6756080",
-                "reference": "a8681b416921ae282ccca2c485d75a3ed6756080",
+                "url": "https://api.github.com/repos/Codeception/Codeception/zipball/e807cd458eb9f7ae7464f33ad835a2f54aa73194",
+                "reference": "e807cd458eb9f7ae7464f33ad835a2f54aa73194",
                 "shasum": ""
             },
             "require": {
                 "behat/gherkin": "~4.4.0",
                 "ext-json": "*",
                 "ext-mbstring": "*",
-                "facebook/webdriver": ">=1.0.1 <2.0",
+                "facebook/webdriver": ">=1.1.3 <2.0",
                 "guzzlehttp/guzzle": ">=4.1.4 <7.0",
                 "guzzlehttp/psr7": "~1.0",
                 "php": ">=5.4.0 <8.0",
                 "phpunit/php-code-coverage": ">=2.2.4 <6.0",
-                "phpunit/phpunit": ">4.8.20 <6.0",
+                "phpunit/phpunit": ">4.8.20 <7.0",
                 "phpunit/phpunit-mock-objects": ">2.3 <5.0",
                 "sebastian/comparator": ">1.1 <3.0",
                 "sebastian/diff": "^1.4",
@@ -997,6 +997,7 @@
                 "php-amqplib/php-amqplib": "~2.4",
                 "predis/predis": "^1.0",
                 "squizlabs/php_codesniffer": "~2.0",
+                "symfony/process": ">=2.7 <4.0",
                 "vlucas/phpdotenv": "^2.4.0"
             },
             "suggest": {
@@ -1041,7 +1042,7 @@
                 "functional testing",
                 "unit testing"
             ],
-            "time": "2017-05-11T21:07:05+00:00"
+            "time": "2017-08-10T20:28:02+00:00"
         },
         {
             "name": "codeception/verify",