diff --git a/web/gui2-topo-lib/projects/gui2-topo-lib/src/lib/topology/topology.component.spec.ts b/web/gui2-topo-lib/projects/gui2-topo-lib/src/lib/topology/topology.component.spec.ts
index b4d579d..c7b6c15 100644
--- a/web/gui2-topo-lib/projects/gui2-topo-lib/src/lib/topology/topology.component.spec.ts
+++ b/web/gui2-topo-lib/projects/gui2-topo-lib/src/lib/topology/topology.component.spec.ts
@@ -50,6 +50,7 @@
 import {DeviceNodeSvgComponent} from '../layer/forcesvg/visuals/devicenodesvg/devicenodesvg.component';
 import {SubRegionNodeSvgComponent} from '../layer/forcesvg/visuals/subregionnodesvg/subregionnodesvg.component';
 import {HostNodeSvgComponent} from '../layer/forcesvg/visuals/hostnodesvg/hostnodesvg.component';
+import {LayoutService} from '../layout.service';
 
 
 class MockActivatedRoute extends ActivatedRoute {
@@ -105,6 +106,8 @@
 
 class MockTrafficService {}
 
+class MockLayoutService {}
+
 class MockPrefsService {
     listeners: ((data) => void)[] = [];
 
@@ -200,6 +203,7 @@
                 { provide: HttpClient, useClass: MockHttpClient },
                 { provide: TopologyService, useClass: MockTopologyService },
                 { provide: TrafficService, useClass: MockTrafficService },
+                { provide: LayoutService, useClass: MockLayoutService },
                 { provide: IconService, useClass: MockIconService },
                 { provide: PrefsService, useClass: MockPrefsService },
                 { provide: KeysService, useClass: MockKeysService },