diff --git a/apps/server/src/modules/h5p-editor/controller/dto/ajax/post.body.params.transform-pipe.spec.ts b/apps/server/src/modules/h5p-editor/controller/dto/ajax/post.body.params.transform-pipe.spec.ts
new file mode 100644
index 00000000000..ab2164c79cb
--- /dev/null
+++ b/apps/server/src/modules/h5p-editor/controller/dto/ajax/post.body.params.transform-pipe.spec.ts
@@ -0,0 +1,41 @@
+import { AjaxPostBodyParams, LibrariesBodyParams, LibraryParametersBodyParams } from './post.body.params';
+import { AjaxPostBodyParamsTransformPipe } from './post.body.params.transform-pipe';
+
+describe('transform', () => {
+	let ajaxBodyTransformPipe: AjaxPostBodyParamsTransformPipe;
+	let emptyAjaxPostBodyParams1: AjaxPostBodyParams;
+	//	let emptyAjaxPostBodyParams2: AjaxPostBodyParams;
+	let emptyAjaxPostBodyParams3: AjaxPostBodyParams;
+	let emptyAjaxPostBodyParams4: AjaxPostBodyParams;
+
+	beforeAll(() => {
+		ajaxBodyTransformPipe = new AjaxPostBodyParamsTransformPipe();
+
+		const emptyLibrariesBodyParams: LibrariesBodyParams = {
+			libraries: [],
+		};
+
+		const emptyLibraryParametersBodyParams: LibraryParametersBodyParams = {
+			libraryParameters: '',
+		};
+
+		emptyAjaxPostBodyParams1 = emptyLibrariesBodyParams;
+		emptyAjaxPostBodyParams3 = emptyLibraryParametersBodyParams;
+		emptyAjaxPostBodyParams4 = undefined;
+	});
+
+	it('when libaries in value', async () => {
+		const result = await ajaxBodyTransformPipe.transform(emptyAjaxPostBodyParams1);
+		expect(result).toBeDefined();
+	});
+
+	it('when libaryParameters in value', async () => {
+		const result = await ajaxBodyTransformPipe.transform(emptyAjaxPostBodyParams3);
+		expect(result).toBeDefined();
+	});
+
+	it('when not libaries | contentId | libaryParameters in value', async () => {
+		const result = await ajaxBodyTransformPipe.transform(emptyAjaxPostBodyParams4);
+		expect(result).toBeUndefined();
+	});
+});
diff --git a/apps/server/src/modules/h5p-editor/controller/dto/ajax/post.body.params.transform-pipe.ts b/apps/server/src/modules/h5p-editor/controller/dto/ajax/post.body.params.transform-pipe.ts
index 40f7348cb97..f37d3e02f1a 100644
--- a/apps/server/src/modules/h5p-editor/controller/dto/ajax/post.body.params.transform-pipe.ts
+++ b/apps/server/src/modules/h5p-editor/controller/dto/ajax/post.body.params.transform-pipe.ts
@@ -15,7 +15,7 @@ import {
 
 @Injectable()
 export class AjaxPostBodyParamsTransformPipe implements PipeTransform {
-	async transform(value: AjaxPostBodyParams) {
+	async transform(value: AjaxPostBodyParams): Promise<unknown> {
 		if (value) {
 			let transformed: Exclude<AjaxPostBodyParams, undefined>;