diff --git a/frontend/src/node-test-shims.d.ts b/frontend/src/node-test-shims.d.ts
index 3164150d..5ea40b80 100644
--- a/frontend/src/node-test-shims.d.ts
+++ b/frontend/src/node-test-shims.d.ts
@@ -1,4 +1,5 @@
 declare module 'node:fs' {
+  export function readdirSync(path: string | URL): string[];
   export function readFileSync(path: string | URL, encoding: string): string;
 }