diff --git a/src/main/java/net/hostsharing/hsadminng/rbac/rbacgrant/RbacGrantsDiagramService.java b/src/main/java/net/hostsharing/hsadminng/rbac/rbacgrant/RbacGrantsDiagramService.java
index 57f86ded..0296cd61 100644
--- a/src/main/java/net/hostsharing/hsadminng/rbac/rbacgrant/RbacGrantsDiagramService.java
+++ b/src/main/java/net/hostsharing/hsadminng/rbac/rbacgrant/RbacGrantsDiagramService.java
@@ -127,9 +127,9 @@ public class RbacGrantsDiagramService {
                 : "";
 
         final var grants = graph.stream()
-                .map(g -> quoted(g.getAscendantIdName()) +
-                        (g.isAssumed() ? " --> " : " -.-> ") +
-                        quoted(g.getDescendantIdName()))
+                .map(g -> quoted(g.getAscendantIdName())
+                        + " -->" + (g.isAssumed() ? " " : "|XX| ")
+                        + quoted(g.getDescendantIdName()))
                 .sorted()
                 .collect(joining("\n"));
 
diff --git a/src/main/java/net/hostsharing/hsadminng/test/cust/TestCustomerController.java b/src/main/java/net/hostsharing/hsadminng/test/cust/TestCustomerController.java
index 78752d9d..67607c83 100644
--- a/src/main/java/net/hostsharing/hsadminng/test/cust/TestCustomerController.java
+++ b/src/main/java/net/hostsharing/hsadminng/test/cust/TestCustomerController.java
@@ -53,7 +53,6 @@ public class TestCustomerController implements TestCustomersApi {
         context.define(currentUser, assumedRoles);
 
         final var saved = testCustomerRepository.save(mapper.map(customer, TestCustomerEntity.class));
-        em.flush();
         final var uri =
                 MvcUriComponentsBuilder.fromController(getClass())
                         .path("/api/test/customers/{id}")
diff --git a/src/test/java/net/hostsharing/hsadminng/hs/office/partner/HsOfficePartnerRepositoryIntegrationTest.java b/src/test/java/net/hostsharing/hsadminng/hs/office/partner/HsOfficePartnerRepositoryIntegrationTest.java
index f9ed63e4..94d06a77 100644
--- a/src/test/java/net/hostsharing/hsadminng/hs/office/partner/HsOfficePartnerRepositoryIntegrationTest.java
+++ b/src/test/java/net/hostsharing/hsadminng/hs/office/partner/HsOfficePartnerRepositoryIntegrationTest.java
@@ -473,7 +473,6 @@ class HsOfficePartnerRepositoryIntegrationTest extends ContextBasedTestWithClean
                     .contact(givenContact)
                     .build();
             relationshipRepo.save(partnerRole);
-            em.flush(); // TODO: why is that necessary?
 
             final var newPartner = HsOfficePartnerEntity.builder()
                     .partnerNumber(partnerNumber)