diff --git a/frontend/sync-client/src/file-operations/file-operations.test.ts b/frontend/sync-client/src/file-operations/file-operations.test.ts
index e0514ae8..43308f8c 100644
--- a/frontend/sync-client/src/file-operations/file-operations.test.ts
+++ b/frontend/sync-client/src/file-operations/file-operations.test.ts
@@ -9,12 +9,20 @@ import { assertSetContainsExactly } from "../utils/assert-set-contains-exactly";
 import type { FileSystemOperations } from "./filesystem-operations";
 
 describe("File operations", () => {
-	class MockDatabase {
+	class MockDatabase implements Partial<Database> {
 		public getLatestDocumentByRelativePath(
 			_find: RelativePath
 		): DocumentRecord | undefined {
+			// no-op
 			return undefined;
 		}
+
+		public move(
+			_oldRelativePath: RelativePath,
+			_newRelativePath: RelativePath
+		): void {
+			// no-op
+		}
 	}
 
 	class FakeFileSystemOperations implements FileSystemOperations {