diff --git a/alfa-service/src/main/java/de/ozgcloud/alfa/collaboration/CollaborationModelAssembler.java b/alfa-service/src/main/java/de/ozgcloud/alfa/collaboration/CollaborationModelAssembler.java
index b85d9d2f8141ed86a177e74acda70821acd6e6c0..f6773286d60724555401f0bd6f0f67dc69591740 100644
--- a/alfa-service/src/main/java/de/ozgcloud/alfa/collaboration/CollaborationModelAssembler.java
+++ b/alfa-service/src/main/java/de/ozgcloud/alfa/collaboration/CollaborationModelAssembler.java
@@ -42,8 +42,7 @@ class CollaborationModelAssembler implements RepresentationModelAssembler<Collab
 
 		return CollectionModelBuilder.fromEntities(entityModels)
 				.addLink(selfLink)
-				.ifMatch(entityModels::isEmpty)
-				.addLink(() -> buildCreateCollaborationRequestLink(vorgangId))
+				.addLink(buildCreateCollaborationRequestLink(vorgangId))
 				.buildModel();
 	}
 
diff --git a/alfa-service/src/test/java/de/ozgcloud/alfa/collaboration/CollaborationModelAssemblerTest.java b/alfa-service/src/test/java/de/ozgcloud/alfa/collaboration/CollaborationModelAssemblerTest.java
index c2e4a7d26085f49987d665331226f0c8a6ad3da6..2af91c24f07289b38a47e216fc75bd7c9b20a899 100644
--- a/alfa-service/src/test/java/de/ozgcloud/alfa/collaboration/CollaborationModelAssemblerTest.java
+++ b/alfa-service/src/test/java/de/ozgcloud/alfa/collaboration/CollaborationModelAssemblerTest.java
@@ -92,84 +92,51 @@ class CollaborationModelAssemblerTest {
 
 	@Nested
 	class TestToCollectionModel {
-		private final Collaboration collaboration = FachstelleCollaborationTestFactory.create();
-
-		@Nested
-		class OnNonEmptyCollaborationList {
-
-			@Test
-			void shouldCallToModel() {
-				callAssembler();
-
-				verify(assembler).toModel(collaboration);
-			}
-
-			@Test
-			void shouldHaveEntityModel() {
-				var entityModel = ModelBuilder.fromEntity(collaboration).buildModel();
-				doReturn(entityModel).when(assembler).toModel(collaboration);
-
-				var collectionModel = callAssembler();
 
-				assertThat(collectionModel.getContent()).containsExactly(entityModel);
-			}
-
-			@Test
-			void shouldHaveSelfLink() {
-				var collectionModel = callAssembler();
-
-				assertThat(collectionModel.getLink(IanaLinkRelations.SELF_VALUE)).get().extracting(Link::getHref)
-						.isEqualTo(CollaborationByVorgangController.PATH + "/" + VorgangHeaderTestFactory.ID + "/collaborations");
-			}
+		private final Collaboration collaboration = FachstelleCollaborationTestFactory.create();
 
-			@Test
-			void shouldNotHaveCreateCollaborationRequestLink() {
-				var collectionModel = callAssembler();
+		@Mock
+		private Link createCollaborationRequestLink;
 
-				assertThat(collectionModel.getLink(CollaborationModelAssembler.REL_CREATE_COLLABORATION_REQUEST)).isEmpty();
-			}
-
-			private CollectionModel<EntityModel<Collaboration>> callAssembler() {
-				return assembler.toCollectionModel(Stream.of(collaboration), VorgangHeaderTestFactory.ID);
-			}
+		@BeforeEach
+		void mock() {
+			doReturn(createCollaborationRequestLink).when(assembler).buildCreateCollaborationRequestLink(VorgangHeaderTestFactory.ID);
 		}
 
-		@Nested
-		class OnEmptyCollaborationList {
+		@Test
+		void shouldCallToModel() {
+			callAssembler();
 
-			@Mock
-			private Link createCollaborationRequestLink;
+			verify(assembler).toModel(collaboration);
+		}
 
-			@BeforeEach
-			void mock() {
-				doReturn(createCollaborationRequestLink).when(assembler).buildCreateCollaborationRequestLink(VorgangHeaderTestFactory.ID);
-			}
+		@Test
+		void shouldHaveEntityModel() {
+			var entityModel = ModelBuilder.fromEntity(collaboration).buildModel();
+			doReturn(entityModel).when(assembler).toModel(collaboration);
 
-			@Test
-			void shouldHaveEmptyContent() {
-				var collectionModel = callAssembler();
+			var collectionModel = callAssembler();
 
-				assertThat(collectionModel.getContent()).isEmpty();
-			}
+			assertThat(collectionModel.getContent()).containsExactly(entityModel);
+		}
 
-			@Test
-			void shouldHaveSelfLink() {
-				var collectionModel = callAssembler();
+		@Test
+		void shouldHaveSelfLink() {
+			var collectionModel = callAssembler();
 
-				assertThat(collectionModel.getLink(IanaLinkRelations.SELF_VALUE)).get().extracting(Link::getHref)
-						.isEqualTo(CollaborationByVorgangController.PATH + "/" + VorgangHeaderTestFactory.ID + "/collaborations");
-			}
+			assertThat(collectionModel.getLink(IanaLinkRelations.SELF_VALUE)).get().extracting(Link::getHref)
+					.isEqualTo(CollaborationByVorgangController.PATH + "/" + VorgangHeaderTestFactory.ID + "/collaborations");
+		}
 
-			@Test
-			void shouldHaveCreateCollaborationRequestLink() {
-				var collectionModel = callAssembler();
+		@Test
+		void shouldHaveCreateCollaborationRequestLink() {
+			var collectionModel = callAssembler();
 
-				assertThat(collectionModel.getLinks()).contains(createCollaborationRequestLink);
-			}
+			assertThat(collectionModel.getLinks()).contains(createCollaborationRequestLink);
+		}
 
-			private CollectionModel<EntityModel<Collaboration>> callAssembler() {
-				return assembler.toCollectionModel(Stream.empty(), VorgangHeaderTestFactory.ID);
-			}
+		private CollectionModel<EntityModel<Collaboration>> callAssembler() {
+			return assembler.toCollectionModel(Stream.of(collaboration), VorgangHeaderTestFactory.ID);
 		}
 	}