diff --git a/composer.json b/composer.json
index 0b91dff9deba7c01e2a4737838bfd0b9034c3e40..6af8757b207660b608670b387db4cce558694453 100644
--- a/composer.json
+++ b/composer.json
@@ -99,7 +99,7 @@
 		"phpspec/prophecy": "^1.12.2",
 		"phpstan/phpstan": "^0.12.64",
 		"phpunit/phpunit": "^8.5.13",
-		"typo3/cms-styleguide": "~11.3.1",
+		"typo3/cms-styleguide": "~11.4.0",
 		"typo3/testing-framework": "^6.8.4"
 	},
 	"suggest": {
diff --git a/composer.lock b/composer.lock
index 1bcfc023f961dcb6079f9e152a9c7a54ad905bd0..ff159a87f6f0cc2f9baaf6d699627d75e3fd3991 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "085bf86c7060c81baf59d5e709b59b7b",
+    "content-hash": "ee8074721f21c25365420293db16b2ff",
     "packages": [
         {
             "name": "bacon/bacon-qr-code",
@@ -7784,21 +7784,22 @@
         },
         {
             "name": "typo3/cms-styleguide",
-            "version": "11.3.1",
+            "version": "11.4.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/TYPO3/styleguide.git",
-                "reference": "11d65d0e89df07a2946e14a7cfb7257ac80a998b"
+                "reference": "d9184095236e607622821c097e8922c4d94dd7e6"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/TYPO3/styleguide/zipball/11d65d0e89df07a2946e14a7cfb7257ac80a998b",
-                "reference": "11d65d0e89df07a2946e14a7cfb7257ac80a998b",
+                "url": "https://api.github.com/repos/TYPO3/styleguide/zipball/d9184095236e607622821c097e8922c4d94dd7e6",
+                "reference": "d9184095236e607622821c097e8922c4d94dd7e6",
                 "shasum": ""
             },
             "require-dev": {
                 "codeception/codeception": "^4.1",
                 "codeception/module-asserts": "^1.2",
+                "codeception/module-cli": "^1.1",
                 "codeception/module-webdriver": "^1.1",
                 "phpstan/phpstan": "^0.12.37",
                 "typo3/cms-about": "dev-master",
@@ -7838,7 +7839,7 @@
                     "role": "Contributor"
                 }
             ],
-            "description": "TYPO3 CMS Extension to test everything in the TYPO3 Backend",
+            "description": "TYPO3 extension to showcase TYPO3 Backend capabilities",
             "homepage": "https://github.com/TYPO3/styleguide",
             "keywords": [
                 "style guide",
@@ -7847,9 +7848,9 @@
             ],
             "support": {
                 "issues": "https://github.com/TYPO3/styleguide/issues",
-                "source": "https://github.com/TYPO3/styleguide/tree/11.3.1"
+                "source": "https://github.com/TYPO3/styleguide/tree/11.4.0"
             },
-            "time": "2021-06-29T13:47:56+00:00"
+            "time": "2021-07-28T16:17:06+00:00"
         },
         {
             "name": "typo3/testing-framework",
diff --git a/typo3/sysext/core/Tests/Acceptance/Support/Extension/BackendCoreEnvironment.php b/typo3/sysext/core/Tests/Acceptance/Support/Extension/BackendCoreEnvironment.php
index 342c058fe02d500edeb1f256367ab5e0f5f4087c..34b23b09ba4d9d729ab5c03d8125481dce6f7ea3 100644
--- a/typo3/sysext/core/Tests/Acceptance/Support/Extension/BackendCoreEnvironment.php
+++ b/typo3/sysext/core/Tests/Acceptance/Support/Extension/BackendCoreEnvironment.php
@@ -88,6 +88,7 @@ class BackendCoreEnvironment extends BackendEnvironment
         // styleguide generator uses DataHandler for some parts. DataHandler needs an initialized BE user
         // with admin right and the live workspace.
         Bootstrap::initializeBackendUser();
+        $GLOBALS['BE_USER']->user['username'] = 'acceptanceTestSetup';
         $GLOBALS['BE_USER']->user['admin'] = 1;
         $GLOBALS['BE_USER']->user['uid'] = 1;
         $GLOBALS['BE_USER']->workspace = 0;
diff --git a/typo3/sysext/core/composer.json b/typo3/sysext/core/composer.json
index cfa2907d77009b7d3d2f65526deb642aa6c750db..f3bf7b99a5482d23f06be6cc27e27a22039e7a32 100644
--- a/typo3/sysext/core/composer.json
+++ b/typo3/sysext/core/composer.json
@@ -80,7 +80,7 @@
 		"php-webdriver/webdriver": "^1.9.0",
 		"phpspec/prophecy": "^1.12.2",
 		"phpstan/phpstan": "^0.12.64",
-		"typo3/cms-styleguide": "~11.3.1",
+		"typo3/cms-styleguide": "~11.4.0",
 		"typo3/testing-framework": "^6.8.4"
 	},
 	"suggest": {