diff --git a/Build/phpstan/Core12/phpstan-baseline.neon b/Build/phpstan/Core12/phpstan-baseline.neon
index 1b117626..1a3590c5 100644
--- a/Build/phpstan/Core12/phpstan-baseline.neon
+++ b/Build/phpstan/Core12/phpstan-baseline.neon
@@ -260,11 +260,6 @@ parameters:
 			count: 1
 			path: ../../../Tests/Functional/Hooks/TranslateHookTest.php
 
-		-
-			message: "#^Parameter \\#1 \\$current of method WebVision\\\\Deepltranslate\\\\Core\\\\Tests\\\\Functional\\\\Hooks\\\\TranslateHookTest\\:\\:mergeInstruction\\(\\) expects TYPO3\\\\TestingFramework\\\\Core\\\\Functional\\\\Framework\\\\Frontend\\\\Internal\\\\AbstractInstruction, TYPO3\\\\TestingFramework\\\\Core\\\\Functional\\\\Framework\\\\Frontend\\\\Internal\\\\AbstractInstruction\\|null given\\.$#"
-			count: 1
-			path: ../../../Tests/Functional/Hooks/TranslateHookTest.php
-
 		-
 			message: "#^Method WebVision\\\\Deepltranslate\\\\Core\\\\Tests\\\\Functional\\\\Regression\\\\GlossaryRegressionTest\\:\\:buildDefaultLanguageConfiguration\\(\\) return type has no value type specified in iterable type array\\.$#"
 			count: 1
@@ -315,11 +310,6 @@ parameters:
 			count: 1
 			path: ../../../Tests/Functional/Regression/GlossaryRegressionTest.php
 
-		-
-			message: "#^Parameter \\#1 \\$current of method WebVision\\\\Deepltranslate\\\\Core\\\\Tests\\\\Functional\\\\Regression\\\\GlossaryRegressionTest\\:\\:mergeInstruction\\(\\) expects TYPO3\\\\TestingFramework\\\\Core\\\\Functional\\\\Framework\\\\Frontend\\\\Internal\\\\AbstractInstruction, TYPO3\\\\TestingFramework\\\\Core\\\\Functional\\\\Framework\\\\Frontend\\\\Internal\\\\AbstractInstruction\\|null given\\.$#"
-			count: 1
-			path: ../../../Tests/Functional/Regression/GlossaryRegressionTest.php
-
 		-
 			message: "#^Method WebVision\\\\Deepltranslate\\\\Core\\\\Tests\\\\Functional\\\\Regression\\\\LocalizationInlineRegressionTest\\:\\:buildDefaultLanguageConfiguration\\(\\) return type has no value type specified in iterable type array\\.$#"
 			count: 1
@@ -370,11 +360,6 @@ parameters:
 			count: 1
 			path: ../../../Tests/Functional/Regression/LocalizationInlineRegressionTest.php
 
-		-
-			message: "#^Parameter \\#1 \\$current of method WebVision\\\\Deepltranslate\\\\Core\\\\Tests\\\\Functional\\\\Regression\\\\LocalizationInlineRegressionTest\\:\\:mergeInstruction\\(\\) expects TYPO3\\\\TestingFramework\\\\Core\\\\Functional\\\\Framework\\\\Frontend\\\\Internal\\\\AbstractInstruction, TYPO3\\\\TestingFramework\\\\Core\\\\Functional\\\\Framework\\\\Frontend\\\\Internal\\\\AbstractInstruction\\|null given\\.$#"
-			count: 1
-			path: ../../../Tests/Functional/Regression/LocalizationInlineRegressionTest.php
-
 		-
 			message: "#^Cannot access property \\$code on DeepL\\\\Language\\|null\\.$#"
 			count: 7
@@ -430,11 +415,6 @@ parameters:
 			count: 1
 			path: ../../../Tests/Functional/Services/LanguageServiceTest.php
 
-		-
-			message: "#^Parameter \\#1 \\$current of method WebVision\\\\Deepltranslate\\\\Core\\\\Tests\\\\Functional\\\\Services\\\\LanguageServiceTest\\:\\:mergeInstruction\\(\\) expects TYPO3\\\\TestingFramework\\\\Core\\\\Functional\\\\Framework\\\\Frontend\\\\Internal\\\\AbstractInstruction, TYPO3\\\\TestingFramework\\\\Core\\\\Functional\\\\Framework\\\\Frontend\\\\Internal\\\\AbstractInstruction\\|null given\\.$#"
-			count: 1
-			path: ../../../Tests/Functional/Services/LanguageServiceTest.php
-
 		-
 			message: "#^Method WebVision\\\\Deepltranslate\\\\Core\\\\Tests\\\\Functional\\\\Updates\\\\FormalityUpgradeWizardTest\\:\\:buildDefaultLanguageConfiguration\\(\\) return type has no value type specified in iterable type array\\.$#"
 			count: 1
@@ -484,8 +464,3 @@ parameters:
 			message: "#^Method WebVision\\\\Deepltranslate\\\\Core\\\\Tests\\\\Functional\\\\Updates\\\\FormalityUpgradeWizardTest\\:\\:writeSiteConfiguration\\(\\) has parameter \\$site with no value type specified in iterable type array\\.$#"
 			count: 1
 			path: ../../../Tests/Functional/Updates/FormalityUpgradeWizardTest.php
-
-		-
-			message: "#^Parameter \\#1 \\$current of method WebVision\\\\Deepltranslate\\\\Core\\\\Tests\\\\Functional\\\\Updates\\\\FormalityUpgradeWizardTest\\:\\:mergeInstruction\\(\\) expects TYPO3\\\\TestingFramework\\\\Core\\\\Functional\\\\Framework\\\\Frontend\\\\Internal\\\\AbstractInstruction, TYPO3\\\\TestingFramework\\\\Core\\\\Functional\\\\Framework\\\\Frontend\\\\Internal\\\\AbstractInstruction\\|null given\\.$#"
-			count: 1
-			path: ../../../Tests/Functional/Updates/FormalityUpgradeWizardTest.php
diff --git a/Tests/Functional/Fixtures/Traits/SiteBasedTestTrait.php b/Tests/Functional/Fixtures/Traits/SiteBasedTestTrait.php
index 55b541de..6f5ef39d 100644
--- a/Tests/Functional/Fixtures/Traits/SiteBasedTestTrait.php
+++ b/Tests/Functional/Fixtures/Traits/SiteBasedTestTrait.php
@@ -8,8 +8,8 @@
 use TYPO3\CMS\Core\Configuration\SiteConfiguration;
 use TYPO3\CMS\Core\Information\Typo3Version;
 use TYPO3\CMS\Core\Utility\GeneralUtility;
-use TYPO3\TestingFramework\Core\Functional\Framework\Frontend\Internal\AbstractInstruction;
 use TYPO3\TestingFramework\Core\Functional\Framework\Frontend\Internal\ArrayValueInstruction;
+use TYPO3\TestingFramework\Core\Functional\Framework\Frontend\Internal\InstructionInterface;
 use TYPO3\TestingFramework\Core\Functional\Framework\Frontend\Internal\TypoScriptInstruction;
 use TYPO3\TestingFramework\Core\Functional\Framework\Frontend\InternalRequest;
 use WebVision\Deepltranslate\Core\Tests\Functional\Fixtures\Frontend\PhpError;
@@ -242,13 +242,13 @@ protected function resolveLanguagePreset(string $identifier)
     /**
      * @todo Instruction handling should be part of Testing Framework (multiple instructions per identifier, merge in interface)
      */
-    protected function applyInstructions(InternalRequest $request, AbstractInstruction ...$instructions): InternalRequest
+    protected function applyInstructions(InternalRequest $request, InstructionInterface ...$instructions): InternalRequest
     {
         $modifiedInstructions = [];
-
+        $instructions = array_filter($instructions);
         foreach ($instructions as $instruction) {
             $identifier = $instruction->getIdentifier();
-            if (isset($modifiedInstructions[$identifier]) || $request->getInstruction($identifier) !== null) {
+            if (($modifiedInstructions[$identifier] ?? $request->getInstruction($identifier)) !== null) {
                 $modifiedInstructions[$identifier] = $this->mergeInstruction(
                     $modifiedInstructions[$identifier] ?? $request->getInstruction($identifier),
                     $instruction
@@ -261,7 +261,7 @@ protected function applyInstructions(InternalRequest $request, AbstractInstructi
         return $request->withInstructions($modifiedInstructions);
     }
 
-    protected function mergeInstruction(AbstractInstruction $current, AbstractInstruction $other): AbstractInstruction
+    protected function mergeInstruction(InstructionInterface $current, InstructionInterface $other): InstructionInterface
     {
         if (get_class($current) !== get_class($other)) {
             throw new LogicException('Cannot merge different instruction types', 1565863174);
diff --git a/composer.json b/composer.json
index f8b13ee1..4ad581f0 100644
--- a/composer.json
+++ b/composer.json
@@ -108,7 +108,7 @@
 		"typo3/cms-rte-ckeditor": "^12.4.2",
 		"typo3/cms-tstemplate": "^12.4.2",
 		"typo3/cms-workspaces": "^12.4.2",
-		"typo3/testing-framework": "^7.1.1"
+		"typo3/testing-framework": "^8.2.7"
 	},
 	"suggest": {
         "b13/container": "Just to be loaded after EXT:container",