diff --git a/rest/taskana-rest-spring/src/test/java/pro/taskana/common/rest/AccessIdControllerIntTest.java b/rest/taskana-rest-spring/src/test/java/pro/taskana/common/rest/AccessIdControllerIntTest.java
index 2a68a06cd..eb95b6a1d 100644
--- a/rest/taskana-rest-spring/src/test/java/pro/taskana/common/rest/AccessIdControllerIntTest.java
+++ b/rest/taskana-rest-spring/src/test/java/pro/taskana/common/rest/AccessIdControllerIntTest.java
@@ -76,6 +76,23 @@ class AccessIdControllerIntTest {
         .containsExactlyInAnyOrder("Schläfrig, Tim", "Eifrig, Elena");
   }
 
+  @Test
+  void should_returnAccessIdWithUmlauten_ifBased64EncodedUserIsLookedUp() {
+    ResponseEntity<List<AccessIdRepresentationModel>> response =
+        template.exchange(
+            restHelper.toUrl(Mapping.URL_ACCESSID) + "?search-for=läf",
+            HttpMethod.GET,
+            restHelper.defaultRequest(),
+            ParameterizedTypeReference.forType(AccessIdListResource.class));
+
+    List<AccessIdRepresentationModel> body = response.getBody();
+    assertThat(body).isNotNull();
+    assertThat(body).hasSize(1);
+    assertThat(body)
+        .extracting(AccessIdRepresentationModel::getName)
+        .containsExactlyInAnyOrder("Schläfrig, Tim");
+  }
+
   @Test
   void testBadRequestWhenSearchForIsTooShort() {
     ThrowingCallable httpCall =
diff --git a/rest/taskana-rest-spring/src/test/resources/taskana-test.ldif b/rest/taskana-rest-spring/src/test/resources/taskana-test.ldif
index 8d1b56686..451300e5e 100644
--- a/rest/taskana-rest-spring/src/test/resources/taskana-test.ldif
+++ b/rest/taskana-rest-spring/src/test/resources/taskana-test.ldif
@@ -156,9 +156,9 @@ objectclass: top
 givenName: Tim
 description: desc
 uid: user-2-2
-sn: Schläfrig
+sn:: U2NobMOkZnJpZw==
 ou: Organisationseinheit/Organisationseinheit KSC/Organisationseinheit KSC 2
-cn: Tim Schläfrig
+cn:: VGltIFNjaGzDpGZyaWc=
 userPassword: user-2-1
 
 ########################