diff --git a/basyx.aasrepository/basyx.aasrepository-feature-authorization/src/test/java/org/eclipse/digitaltwin/basyx/aasrepository/feature/authorization/TestAuthorizedAasRepository.java b/basyx.aasrepository/basyx.aasrepository-feature-authorization/src/test/java/org/eclipse/digitaltwin/basyx/aasrepository/feature/authorization/TestAuthorizedAasRepository.java
index 4533bd801..76d503397 100644
--- a/basyx.aasrepository/basyx.aasrepository-feature-authorization/src/test/java/org/eclipse/digitaltwin/basyx/aasrepository/feature/authorization/TestAuthorizedAasRepository.java
+++ b/basyx.aasrepository/basyx.aasrepository-feature-authorization/src/test/java/org/eclipse/digitaltwin/basyx/aasrepository/feature/authorization/TestAuthorizedAasRepository.java
@@ -575,7 +575,7 @@ public void setThumbnailWithCorrectRoleAndPermission() throws IOException {
 		String accessToken = getAccessToken(DummyCredentialStore.BASYX_UPDATER_CREDENTIAL);
 		
 		CloseableHttpResponse retrievalResponse = setThumbnailToAasWithAuthorization(SPECIFIC_SHELL_ID, accessToken);
-		assertEquals(HttpStatus.OK.value(), retrievalResponse.getCode());
+		assertEquals(HttpStatus.NO_CONTENT.value(), retrievalResponse.getCode());
 		
 		deleteElementWithAuthorization(BaSyxHttpTestUtils.getThumbnailAccessURL(createAasRepositoryUrl(aasRepositoryBaseUrl), SPECIFIC_SHELL_ID), getAccessToken(DummyCredentialStore.ADMIN_CREDENTIAL));
 	}
@@ -585,7 +585,7 @@ public void setThumbnailWithCorrectRoleAndSpecificAasPermission() throws IOExcep
 		String accessToken = getAccessToken(DummyCredentialStore.BASYX_UPDATER_TWO_CREDENTIAL);
 		
 		CloseableHttpResponse retrievalResponse = setThumbnailToAasWithAuthorization(SPECIFIC_SHELL_ID, accessToken);
-		assertEquals(HttpStatus.OK.value(), retrievalResponse.getCode());
+		assertEquals(HttpStatus.NO_CONTENT.value(), retrievalResponse.getCode());
 		
 		deleteElementWithAuthorization(BaSyxHttpTestUtils.getThumbnailAccessURL(createAasRepositoryUrl(aasRepositoryBaseUrl), SPECIFIC_SHELL_ID), getAccessToken(DummyCredentialStore.ADMIN_CREDENTIAL));
 	}