diff --git a/src/entities/Breadcrumb/model/store/scrollBreadcrumbsStore.test.ts b/src/entities/Breadcrumb/model/store/scrollBreadcrumbsStore.test.ts
index bdf0cb5..dd3929b 100644
--- a/src/entities/Breadcrumb/model/store/scrollBreadcrumbsStore.test.ts
+++ b/src/entities/Breadcrumb/model/store/scrollBreadcrumbsStore.test.ts
@@ -20,6 +20,7 @@ let mockObserverInstances: MockIntersectionObserver[] = [];
 class MockIntersectionObserver implements IntersectionObserver {
     root = null;
     rootMargin = '';
+    scrollMargin = '';
     thresholds: number[] = [];
     readonly callbacks: Array<(entries: IntersectionObserverEntry[], observer: IntersectionObserver) => void> = [];
     readonly observedElements = new Set<Element>();