diff --git a/apps/testing/composer/composer/autoload_classmap.php b/apps/testing/composer/composer/autoload_classmap.php
index 6dce2e26361ba..bcb68d25bbdf3 100644
--- a/apps/testing/composer/composer/autoload_classmap.php
+++ b/apps/testing/composer/composer/autoload_classmap.php
@@ -22,4 +22,9 @@
     'OCA\\Testing\\Provider\\FakeTextProcessingProviderSync' => $baseDir . '/../lib/Provider/FakeTextProcessingProviderSync.php',
     'OCA\\Testing\\Provider\\FakeTranslationProvider' => $baseDir . '/../lib/Provider/FakeTranslationProvider.php',
     'OCA\\Testing\\Settings\\DeclarativeSettingsForm' => $baseDir . '/../lib/Settings/DeclarativeSettingsForm.php',
+    'OCA\\Testing\\TaskProcessing\\FakeContextWriteProvider' => $baseDir . '/../lib/TaskProcessing/FakeContextWriteProvider.php',
+    'OCA\\Testing\\TaskProcessing\\FakeTextToImageProvider' => $baseDir . '/../lib/TaskProcessing/FakeTextToImageProvider.php',
+    'OCA\\Testing\\TaskProcessing\\FakeTextToTextProvider' => $baseDir . '/../lib/TaskProcessing/FakeTextToTextProvider.php',
+    'OCA\\Testing\\TaskProcessing\\FakeTranscribeProvider' => $baseDir . '/../lib/TaskProcessing/FakeTranscribeProvider.php',
+    'OCA\\Testing\\TaskProcessing\\FakeTranslateProvider' => $baseDir . '/../lib/TaskProcessing/FakeTranslateProvider.php',
 );
diff --git a/apps/testing/composer/composer/autoload_static.php b/apps/testing/composer/composer/autoload_static.php
index 3be58e042894f..5a165d7d0c208 100644
--- a/apps/testing/composer/composer/autoload_static.php
+++ b/apps/testing/composer/composer/autoload_static.php
@@ -37,6 +37,11 @@ class ComposerStaticInitTesting
         'OCA\\Testing\\Provider\\FakeTextProcessingProviderSync' => __DIR__ . '/..' . '/../lib/Provider/FakeTextProcessingProviderSync.php',
         'OCA\\Testing\\Provider\\FakeTranslationProvider' => __DIR__ . '/..' . '/../lib/Provider/FakeTranslationProvider.php',
         'OCA\\Testing\\Settings\\DeclarativeSettingsForm' => __DIR__ . '/..' . '/../lib/Settings/DeclarativeSettingsForm.php',
+        'OCA\\Testing\\TaskProcessing\\FakeContextWriteProvider' => __DIR__ . '/..' . '/../lib/TaskProcessing/FakeContextWriteProvider.php',
+        'OCA\\Testing\\TaskProcessing\\FakeTextToImageProvider' => __DIR__ . '/..' . '/../lib/TaskProcessing/FakeTextToImageProvider.php',
+        'OCA\\Testing\\TaskProcessing\\FakeTextToTextProvider' => __DIR__ . '/..' . '/../lib/TaskProcessing/FakeTextToTextProvider.php',
+        'OCA\\Testing\\TaskProcessing\\FakeTranscribeProvider' => __DIR__ . '/..' . '/../lib/TaskProcessing/FakeTranscribeProvider.php',
+        'OCA\\Testing\\TaskProcessing\\FakeTranslateProvider' => __DIR__ . '/..' . '/../lib/TaskProcessing/FakeTranslateProvider.php',
     );
 
     public static function getInitializer(ClassLoader $loader)
diff --git a/apps/testing/lib/AppInfo/Application.php b/apps/testing/lib/AppInfo/Application.php
index f6f9777e81c7b..02e37a4511b2e 100644
--- a/apps/testing/lib/AppInfo/Application.php
+++ b/apps/testing/lib/AppInfo/Application.php
@@ -15,6 +15,11 @@
 use OCA\Testing\Provider\FakeTextProcessingProviderSync;
 use OCA\Testing\Provider\FakeTranslationProvider;
 use OCA\Testing\Settings\DeclarativeSettingsForm;
+use OCA\Testing\TaskProcessing\FakeContextWriteProvider;
+use OCA\Testing\TaskProcessing\FakeTextToImageProvider;
+use OCA\Testing\TaskProcessing\FakeTextToTextProvider;
+use OCA\Testing\TaskProcessing\FakeTranscribeProvider;
+use OCA\Testing\TaskProcessing\FakeTranslateProvider;
 use OCP\AppFramework\App;
 use OCP\AppFramework\Bootstrap\IBootContext;
 use OCP\AppFramework\Bootstrap\IBootstrap;
@@ -24,8 +29,10 @@
 use OCP\Settings\Events\DeclarativeSettingsSetValueEvent;
 
 class Application extends App implements IBootstrap {
+	public const APP_ID = 'testing';
+
 	public function __construct(array $urlParams = []) {
-		parent::__construct('testing', $urlParams);
+		parent::__construct(self::APP_ID, $urlParams);
 	}
 
 	public function register(IRegistrationContext $context): void {
@@ -34,6 +41,12 @@ public function register(IRegistrationContext $context): void {
 		$context->registerTextProcessingProvider(FakeTextProcessingProviderSync::class);
 		$context->registerTextToImageProvider(FakeText2ImageProvider::class);
 
+		$context->registerTaskProcessingProvider(FakeTextToTextProvider::class);
+		$context->registerTaskProcessingProvider(FakeTextToImageProvider::class);
+		$context->registerTaskProcessingProvider(FakeTranslateProvider::class);
+		$context->registerTaskProcessingProvider(FakeTranscribeProvider::class);
+		$context->registerTaskProcessingProvider(FakeContextWriteProvider::class);
+
 		$context->registerDeclarativeSettings(DeclarativeSettingsForm::class);
 		$context->registerEventListener(DeclarativeSettingsRegisterFormEvent::class, RegisterDeclarativeSettingsListener::class);
 		$context->registerEventListener(DeclarativeSettingsGetValueEvent::class, GetDeclarativeSettingsValueListener::class);
@@ -43,7 +56,7 @@ public function register(IRegistrationContext $context): void {
 	public function boot(IBootContext $context): void {
 		$server = $context->getServerContainer();
 		$config = $server->getConfig();
-		if ($config->getAppValue('testing', 'enable_alt_user_backend', 'no') === 'yes') {
+		if ($config->getAppValue(self::APP_ID, 'enable_alt_user_backend', 'no') === 'yes') {
 			$userManager = $server->getUserManager();
 
 			// replace all user backends with this one
diff --git a/apps/testing/lib/TaskProcessing/FakeContextWriteProvider.php b/apps/testing/lib/TaskProcessing/FakeContextWriteProvider.php
new file mode 100644
index 0000000000000..32aa1ebd7c971
--- /dev/null
+++ b/apps/testing/lib/TaskProcessing/FakeContextWriteProvider.php
@@ -0,0 +1,121 @@
+<?php
+/**
+ * SPDX-FileCopyrightText: 2023 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+declare(strict_types=1);
+
+namespace OCA\Testing\TaskProcessing;
+
+use OCA\Testing\AppInfo\Application;
+use OCP\TaskProcessing\EShapeType;
+use OCP\TaskProcessing\ISynchronousProvider;
+use OCP\TaskProcessing\ShapeDescriptor;
+use OCP\TaskProcessing\ShapeEnumValue;
+use OCP\TaskProcessing\TaskTypes\ContextWrite;
+use RuntimeException;
+
+class FakeContextWriteProvider implements ISynchronousProvider {
+
+	public function __construct() {
+	}
+
+	public function getId(): string {
+		return Application::APP_ID . '-contextwrite';
+	}
+
+	public function getName(): string {
+		return 'Fake context write task processing provider';
+	}
+
+	public function getTaskTypeId(): string {
+		return ContextWrite::ID;
+	}
+
+	public function getExpectedRuntime(): int {
+		return 1;
+	}
+
+	public function getInputShapeEnumValues(): array {
+		return [];
+	}
+
+	public function getInputShapeDefaults(): array {
+		return [];
+	}
+
+	public function getOptionalInputShape(): array {
+		return [
+			'max_tokens' => new ShapeDescriptor(
+				'Maximum output words',
+				'The maximum number of words/tokens that can be generated in the completion.',
+				EShapeType::Number
+			),
+			'model' => new ShapeDescriptor(
+				'Model',
+				'The model used to generate the completion',
+				EShapeType::Enum
+			),
+		];
+	}
+
+	public function getOptionalInputShapeEnumValues(): array {
+		return [
+			'model' => [
+				new ShapeEnumValue('Model 1', 'model_1'),
+				new ShapeEnumValue('Model 2', 'model_2'),
+				new ShapeEnumValue('Model 3', 'model_3'),
+			],
+		];
+	}
+
+	public function getOptionalInputShapeDefaults(): array {
+		return [
+			'max_tokens' => 4321,
+			'model' => 'model_2',
+		];
+	}
+
+	public function getOutputShapeEnumValues(): array {
+		return [];
+	}
+
+	public function getOptionalOutputShape(): array {
+		return [];
+	}
+
+	public function getOptionalOutputShapeEnumValues(): array {
+		return [];
+	}
+
+	public function process(?string $userId, array $input, callable $reportProgress): array {
+		if (
+			!isset($input['style_input']) || !is_string($input['style_input'])
+				|| !isset($input['source_input']) || !is_string($input['source_input'])
+		) {
+			throw new RuntimeException('Invalid inputs');
+		}
+		$writingStyle = $input['style_input'];
+		$sourceMaterial = $input['source_input'];
+
+		if (isset($input['model']) && is_string($input['model'])) {
+			$model = $input['model'];
+		} else {
+			$model = 'unknown model';
+		}
+
+		$maxTokens = null;
+		if (isset($input['max_tokens']) && is_int($input['max_tokens'])) {
+			$maxTokens = $input['max_tokens'];
+		}
+
+		$fakeResult = 'This is a fake result: '
+			. "\n\n- Style input: " . $writingStyle
+			. "\n- Source input: " . $sourceMaterial
+			. "\n- Model: " . $model
+			. "\n- Maximum number of words: " . $maxTokens;
+
+		return ['output' => $fakeResult];
+	}
+}
diff --git a/apps/testing/lib/TaskProcessing/FakeTextToImageProvider.php b/apps/testing/lib/TaskProcessing/FakeTextToImageProvider.php
new file mode 100644
index 0000000000000..429b3af9d574f
--- /dev/null
+++ b/apps/testing/lib/TaskProcessing/FakeTextToImageProvider.php
@@ -0,0 +1,99 @@
+<?php
+/**
+ * SPDX-FileCopyrightText: 2023 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+declare(strict_types=1);
+
+namespace OCA\Testing\TaskProcessing;
+
+use OCA\Testing\AppInfo\Application;
+use OCP\TaskProcessing\EShapeType;
+use OCP\TaskProcessing\ISynchronousProvider;
+use OCP\TaskProcessing\ShapeDescriptor;
+use OCP\TaskProcessing\TaskTypes\TextToImage;
+use RuntimeException;
+
+class FakeTextToImageProvider implements ISynchronousProvider {
+
+	public function __construct() {
+	}
+
+	public function getId(): string {
+		return Application::APP_ID . '-text2image';
+	}
+
+	public function getName(): string {
+		return 'Fake text2image task processing provider';
+	}
+
+	public function getTaskTypeId(): string {
+		return TextToImage::ID;
+	}
+
+	public function getExpectedRuntime(): int {
+		return 1;
+	}
+
+	public function getInputShapeEnumValues(): array {
+		return [];
+	}
+
+	public function getInputShapeDefaults(): array {
+		return [
+			'numberOfImages' => 1,
+		];
+	}
+
+	public function getOptionalInputShape(): array {
+		return [
+			'size' => new ShapeDescriptor(
+				'Size',
+				'Optional. The size of the generated images. Must be in 256x256 format.',
+				EShapeType::Text
+			),
+		];
+	}
+
+	public function getOptionalInputShapeEnumValues(): array {
+		return [];
+	}
+
+	public function getOptionalInputShapeDefaults(): array {
+		return [];
+	}
+
+	public function getOutputShapeEnumValues(): array {
+		return [];
+	}
+
+	public function getOptionalOutputShape(): array {
+		return [];
+	}
+
+	public function getOptionalOutputShapeEnumValues(): array {
+		return [];
+	}
+
+	public function process(?string $userId, array $input, callable $reportProgress): array {
+		if (!isset($input['input']) || !is_string($input['input'])) {
+			throw new RuntimeException('Invalid prompt');
+		}
+		$prompt = $input['input'];
+
+		$nbImages = 1;
+		if (isset($input['numberOfImages']) && is_int($input['numberOfImages'])) {
+			$nbImages = $input['numberOfImages'];
+		}
+
+		$fakeContent = file_get_contents(__DIR__ . '/../../img/logo.png');
+
+		$output = ['images' => []];
+		foreach (range(1, $nbImages) as $i) {
+			$output['images'][] = $fakeContent;
+		}
+		/** @var array<string, list<numeric|string>|numeric|string> $output */
+		return $output;
+	}
+}
diff --git a/apps/testing/lib/TaskProcessing/FakeTextToTextProvider.php b/apps/testing/lib/TaskProcessing/FakeTextToTextProvider.php
new file mode 100644
index 0000000000000..9854cd3e60923
--- /dev/null
+++ b/apps/testing/lib/TaskProcessing/FakeTextToTextProvider.php
@@ -0,0 +1,113 @@
+<?php
+/**
+ * SPDX-FileCopyrightText: 2023 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+declare(strict_types=1);
+
+namespace OCA\Testing\TaskProcessing;
+
+use OCA\Testing\AppInfo\Application;
+use OCP\TaskProcessing\EShapeType;
+use OCP\TaskProcessing\ISynchronousProvider;
+use OCP\TaskProcessing\ShapeDescriptor;
+use OCP\TaskProcessing\ShapeEnumValue;
+use OCP\TaskProcessing\TaskTypes\TextToText;
+use RuntimeException;
+
+class FakeTextToTextProvider implements ISynchronousProvider {
+
+	public function __construct() {
+	}
+
+	public function getId(): string {
+		return Application::APP_ID . '-text2text';
+	}
+
+	public function getName(): string {
+		return 'Fake text2text task processing provider';
+	}
+
+	public function getTaskTypeId(): string {
+		return TextToText::ID;
+	}
+
+	public function getExpectedRuntime(): int {
+		return 1;
+	}
+
+	public function getInputShapeEnumValues(): array {
+		return [];
+	}
+
+	public function getInputShapeDefaults(): array {
+		return [];
+	}
+
+	public function getOptionalInputShape(): array {
+		return [
+			'max_tokens' => new ShapeDescriptor(
+				'Maximum output words',
+				'The maximum number of words/tokens that can be generated in the completion.',
+				EShapeType::Number
+			),
+			'model' => new ShapeDescriptor(
+				'Model',
+				'The model used to generate the completion',
+				EShapeType::Enum
+			),
+		];
+	}
+
+	public function getOptionalInputShapeEnumValues(): array {
+		return [
+			'model' => [
+				new ShapeEnumValue('Model 1', 'model_1'),
+				new ShapeEnumValue('Model 2', 'model_2'),
+				new ShapeEnumValue('Model 3', 'model_3'),
+			],
+		];
+	}
+
+	public function getOptionalInputShapeDefaults(): array {
+		return [
+			'max_tokens' => 1234,
+			'model' => 'model_2',
+		];
+	}
+
+	public function getOptionalOutputShape(): array {
+		return [];
+	}
+
+	public function getOutputShapeEnumValues(): array {
+		return [];
+	}
+
+	public function getOptionalOutputShapeEnumValues(): array {
+		return [];
+	}
+
+	public function process(?string $userId, array $input, callable $reportProgress): array {
+		if (isset($input['model']) && is_string($input['model'])) {
+			$model = $input['model'];
+		} else {
+			$model = 'unknown model';
+		}
+
+		if (!isset($input['input']) || !is_string($input['input'])) {
+			throw new RuntimeException('Invalid prompt');
+		}
+		$prompt = $input['input'];
+
+		$maxTokens = null;
+		if (isset($input['max_tokens']) && is_int($input['max_tokens'])) {
+			$maxTokens = $input['max_tokens'];
+		}
+
+		return [
+			'output' => 'This is a fake result: ' . "\n\n- Prompt: " . $prompt . "\n- Model: " . $model . "\n- Maximum number of words: " . $maxTokens,
+		];
+	}
+}
diff --git a/apps/testing/lib/TaskProcessing/FakeTranscribeProvider.php b/apps/testing/lib/TaskProcessing/FakeTranscribeProvider.php
new file mode 100644
index 0000000000000..5401c5e16f8d5
--- /dev/null
+++ b/apps/testing/lib/TaskProcessing/FakeTranscribeProvider.php
@@ -0,0 +1,80 @@
+<?php
+/**
+ * SPDX-FileCopyrightText: 2023 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+declare(strict_types=1);
+
+namespace OCA\Testing\TaskProcessing;
+
+use OCA\Testing\AppInfo\Application;
+use OCP\Files\File;
+use OCP\TaskProcessing\ISynchronousProvider;
+use OCP\TaskProcessing\TaskTypes\AudioToText;
+use RuntimeException;
+
+class FakeTranscribeProvider implements ISynchronousProvider {
+
+	public function __construct(
+	) {
+	}
+
+	public function getId(): string {
+		return Application::APP_ID . '-audio2text';
+	}
+
+	public function getName(): string {
+		return 'Fake audio2text task processing provider';
+	}
+
+	public function getTaskTypeId(): string {
+		return AudioToText::ID;
+	}
+
+	public function getExpectedRuntime(): int {
+		return 1;
+	}
+
+	public function getInputShapeEnumValues(): array {
+		return [];
+	}
+
+	public function getInputShapeDefaults(): array {
+		return [];
+	}
+
+	public function getOptionalInputShape(): array {
+		return [];
+	}
+
+	public function getOptionalInputShapeEnumValues(): array {
+		return [];
+	}
+
+	public function getOptionalInputShapeDefaults(): array {
+		return [];
+	}
+
+	public function getOutputShapeEnumValues(): array {
+		return [];
+	}
+
+	public function getOptionalOutputShape(): array {
+		return [];
+	}
+
+	public function getOptionalOutputShapeEnumValues(): array {
+		return [];
+	}
+
+	public function process(?string $userId, array $input, callable $reportProgress): array {
+		if (!isset($input['input']) || !$input['input'] instanceof File || !$input['input']->isReadable()) {
+			throw new RuntimeException('Invalid input file');
+		}
+		$inputFile = $input['input'];
+		$transcription = 'Fake transcription result';
+
+		return ['output' => $transcription];
+	}
+}
diff --git a/apps/testing/lib/TaskProcessing/FakeTranslateProvider.php b/apps/testing/lib/TaskProcessing/FakeTranslateProvider.php
new file mode 100644
index 0000000000000..064f54f265065
--- /dev/null
+++ b/apps/testing/lib/TaskProcessing/FakeTranslateProvider.php
@@ -0,0 +1,146 @@
+<?php
+/**
+ * SPDX-FileCopyrightText: 2023 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+declare(strict_types=1);
+
+namespace OCA\Testing\TaskProcessing;
+
+use OCA\Testing\AppInfo\Application;
+use OCP\L10N\IFactory;
+use OCP\TaskProcessing\EShapeType;
+use OCP\TaskProcessing\ISynchronousProvider;
+use OCP\TaskProcessing\ShapeDescriptor;
+use OCP\TaskProcessing\ShapeEnumValue;
+use OCP\TaskProcessing\TaskTypes\TextToTextTranslate;
+use RuntimeException;
+
+class FakeTranslateProvider implements ISynchronousProvider {
+
+	public function __construct(
+		private IFactory $l10nFactory,
+	) {
+	}
+
+	public function getId(): string {
+		return Application::APP_ID . '-translate';
+	}
+
+	public function getName(): string {
+		return 'Fake translate task processing provider';
+	}
+
+	public function getTaskTypeId(): string {
+		return TextToTextTranslate::ID;
+	}
+
+	public function getExpectedRuntime(): int {
+		return 1;
+	}
+
+	public function getInputShapeEnumValues(): array {
+		$coreL = $this->l10nFactory->getLanguages();
+		$languages = array_merge($coreL['commonLanguages'], $coreL['otherLanguages']);
+		$languageEnumValues = array_map(static function (array $language) {
+			return new ShapeEnumValue($language['name'], $language['code']);
+		}, $languages);
+		$detectLanguageEnumValue = new ShapeEnumValue('Detect language', 'detect_language');
+		return [
+			'origin_language' => array_merge([$detectLanguageEnumValue], $languageEnumValues),
+			'target_language' => $languageEnumValues,
+		];
+	}
+
+	public function getInputShapeDefaults(): array {
+		return [
+			'origin_language' => 'detect_language',
+		];
+	}
+
+	public function getOptionalInputShape(): array {
+		return [
+			'max_tokens' => new ShapeDescriptor(
+				'Maximum output words',
+				'The maximum number of words/tokens that can be generated in the completion.',
+				EShapeType::Number
+			),
+			'model' => new ShapeDescriptor(
+				'Model',
+				'The model used to generate the completion',
+				EShapeType::Enum
+			),
+		];
+	}
+
+	public function getOptionalInputShapeEnumValues(): array {
+		return [
+			'model' => [
+				new ShapeEnumValue('Model 1', 'model_1'),
+				new ShapeEnumValue('Model 2', 'model_2'),
+				new ShapeEnumValue('Model 3', 'model_3'),
+			],
+		];
+	}
+
+	public function getOptionalInputShapeDefaults(): array {
+		return [
+			'max_tokens' => 200,
+			'model' => 'model_3',
+		];
+	}
+
+	public function getOptionalOutputShape(): array {
+		return [];
+	}
+
+	public function getOutputShapeEnumValues(): array {
+		return [];
+	}
+
+	public function getOptionalOutputShapeEnumValues(): array {
+		return [];
+	}
+
+	private function getCoreLanguagesByCode(): array {
+		$coreL = $this->l10nFactory->getLanguages();
+		$coreLanguages = array_reduce(array_merge($coreL['commonLanguages'], $coreL['otherLanguages']), function ($carry, $val) {
+			$carry[$val['code']] = $val['name'];
+			return $carry;
+		});
+		return $coreLanguages;
+	}
+
+	public function process(?string $userId, array $input, callable $reportProgress): array {
+		if (isset($input['model']) && is_string($input['model'])) {
+			$model = $input['model'];
+		} else {
+			$model = 'model_3';
+		}
+
+		if (!isset($input['input']) || !is_string($input['input'])) {
+			throw new RuntimeException('Invalid input text');
+		}
+		$inputText = $input['input'];
+
+		$maxTokens = null;
+		if (isset($input['max_tokens']) && is_int($input['max_tokens'])) {
+			$maxTokens = $input['max_tokens'];
+		}
+
+		$coreLanguages = $this->getCoreLanguagesByCode();
+
+		$toLanguage = $coreLanguages[$input['target_language']] ?? $input['target_language'];
+		if ($input['origin_language'] !== 'detect_language') {
+			$fromLanguage = $coreLanguages[$input['origin_language']] ?? $input['origin_language'];
+			$prompt = 'Fake translation from ' . $fromLanguage . ' to ' . $toLanguage . ': ' . $inputText;
+		} else {
+			$prompt = 'Fake Translation to ' . $toLanguage . ': ' . $inputText;
+		}
+
+		$fakeResult = $prompt . "\n\nModel: " . $model . "\nMax tokens: " . $maxTokens;
+
+		return ['output' => $fakeResult];
+	}
+}
diff --git a/lib/private/TaskProcessing/Manager.php b/lib/private/TaskProcessing/Manager.php
index a804115a63153..37533df088f71 100644
--- a/lib/private/TaskProcessing/Manager.php
+++ b/lib/private/TaskProcessing/Manager.php
@@ -649,24 +649,24 @@ public function getProviders(): array {
 		return $this->providers;
 	}
 
-	public function getPreferredProvider(string $taskType) {
+	public function getPreferredProvider(string $taskTypeId) {
 		try {
 			$preferences = json_decode($this->config->getAppValue('core', 'ai.taskprocessing_provider_preferences', 'null'), associative: true, flags: JSON_THROW_ON_ERROR);
 			$providers = $this->getProviders();
-			if (isset($preferences[$taskType])) {
-				$provider = current(array_values(array_filter($providers, fn ($provider) => $provider->getId() === $preferences[$taskType])));
+			if (isset($preferences[$taskTypeId])) {
+				$provider = current(array_values(array_filter($providers, fn ($provider) => $provider->getId() === $preferences[$taskTypeId])));
 				if ($provider !== false) {
 					return $provider;
 				}
 			}
 			// By default, use the first available provider
 			foreach ($providers as $provider) {
-				if ($provider->getTaskTypeId() === $taskType) {
+				if ($provider->getTaskTypeId() === $taskTypeId) {
 					return $provider;
 				}
 			}
 		} catch (\JsonException $e) {
-			$this->logger->warning('Failed to parse provider preferences while getting preferred provider for task type ' . $taskType, ['exception' => $e]);
+			$this->logger->warning('Failed to parse provider preferences while getting preferred provider for task type ' . $taskTypeId, ['exception' => $e]);
 		}
 		throw new \OCP\TaskProcessing\Exception\Exception('No matching provider found');
 	}
@@ -674,14 +674,14 @@ public function getPreferredProvider(string $taskType) {
 	public function getAvailableTaskTypes(): array {
 		if ($this->availableTaskTypes === null) {
 			$taskTypes = $this->_getTaskTypes();
-			$providers = $this->getProviders();
 
 			$availableTaskTypes = [];
-			foreach ($providers as $provider) {
-				if (!isset($taskTypes[$provider->getTaskTypeId()])) {
+			foreach ($taskTypes as $taskType) {
+				try {
+					$provider = $this->getPreferredProvider($taskType->getId());
+				} catch (\OCP\TaskProcessing\Exception\Exception $e) {
 					continue;
 				}
-				$taskType = $taskTypes[$provider->getTaskTypeId()];
 				try {
 					$availableTaskTypes[$provider->getTaskTypeId()] = [
 						'name' => $taskType->getName(),
diff --git a/lib/private/TaskProcessing/SynchronousBackgroundJob.php b/lib/private/TaskProcessing/SynchronousBackgroundJob.php
index 093882d4c1e53..85a8fbc21f6f6 100644
--- a/lib/private/TaskProcessing/SynchronousBackgroundJob.php
+++ b/lib/private/TaskProcessing/SynchronousBackgroundJob.php
@@ -43,9 +43,14 @@ protected function run($argument) {
 			if (!$provider instanceof ISynchronousProvider) {
 				continue;
 			}
-			$taskType = $provider->getTaskTypeId();
+			$taskTypeId = $provider->getTaskTypeId();
+			// only use this provider if it is the preferred one
+			$preferredProvider = $this->taskProcessingManager->getPreferredProvider($taskTypeId);
+			if ($provider->getId() !== $preferredProvider->getId()) {
+				continue;
+			}
 			try {
-				$task = $this->taskProcessingManager->getNextScheduledTask([$taskType]);
+				$task = $this->taskProcessingManager->getNextScheduledTask([$taskTypeId]);
 			} catch (NotFoundException $e) {
 				continue;
 			} catch (Exception $e) {
diff --git a/lib/public/TaskProcessing/IManager.php b/lib/public/TaskProcessing/IManager.php
index e3e6b3be09da4..86788449aaf55 100644
--- a/lib/public/TaskProcessing/IManager.php
+++ b/lib/public/TaskProcessing/IManager.php
@@ -38,12 +38,12 @@ public function hasProviders(): bool;
 	public function getProviders(): array;
 
 	/**
-	 * @param string $taskType
+	 * @param string $taskTypeId
 	 * @return IProvider
 	 * @throws Exception
 	 * @since 30.0.0
 	 */
-	public function getPreferredProvider(string $taskType);
+	public function getPreferredProvider(string $taskTypeId);
 
 	/**
 	 * @return array<array-key,array{name: string, description: string, inputShape: ShapeDescriptor[], inputShapeEnumValues: ShapeEnumValue[][], inputShapeDefaults: array<array-key, numeric|string>, optionalInputShape: ShapeDescriptor[], optionalInputShapeEnumValues: ShapeEnumValue[][], optionalInputShapeDefaults: array<array-key, numeric|string>, outputShape: ShapeDescriptor[], outputShapeEnumValues: ShapeEnumValue[][], optionalOutputShape: ShapeDescriptor[], optionalOutputShapeEnumValues: ShapeEnumValue[][]}>