diff --git a/alfa-client/libs/collaboration/src/lib/collaboration-in-vorgang-container/collaboration-in-vorgang/collaboration-in-vorgang.component.html b/alfa-client/libs/collaboration/src/lib/collaboration-in-vorgang-container/collaboration-in-vorgang/collaboration-in-vorgang.component.html
index 7849a2ee56c82f411ae5be88273c000e31c3d791..79bb84ec7720cdec55fbf4f4af906656fa48bd1f 100644
--- a/alfa-client/libs/collaboration/src/lib/collaboration-in-vorgang-container/collaboration-in-vorgang/collaboration-in-vorgang.component.html
+++ b/alfa-client/libs/collaboration/src/lib/collaboration-in-vorgang-container/collaboration-in-vorgang/collaboration-in-vorgang.component.html
@@ -6,14 +6,14 @@
   >
     <alfa-organisations-einheit-container
       *ngIf="showOrganisationsEinheitAnfrageButton"
-      class="flex-1"
+      class="flex flex-1"
       data-test-id="organisations-einheit-container"
       [vorgang]="vorgang"
       [collaborationListResource]="collaborationStateListResource.resource"
     ></alfa-organisations-einheit-container>
     <alfa-externe-fachstelle-container
       *ngIf="showExterneFachstelleAnfrageButton"
-      class="flex-1"
+      class="flex flex-1"
       data-test-id="externe-fachstelle-container"
       [vorgang]="vorgang"
       [collaborationListResource]="collaborationStateListResource.resource"