diff --git a/src/components/ProjectSettings/tests/index.test.tsx b/src/components/ProjectSettings/tests/index.test.tsx
index ef1ee8e3a4..f999aa2bef 100644
--- a/src/components/ProjectSettings/tests/index.test.tsx
+++ b/src/components/ProjectSettings/tests/index.test.tsx
@@ -34,6 +34,7 @@ jest.mock("backend", () => ({
   getAllUsers: () => Promise.resolve([]),
   getCurrentPermissions: () => mockGetCurrentPermissions(),
   getUserRoles: () => Promise.resolve([]),
+  isFrontierNonempty: () => Promise.resolve(false),
 }));
 jest.mock("components/Project/ProjectActions");
 // Mock "i18n", else `thrown: "Error: Error: connect ECONNREFUSED ::1:80 [...]`