diff --git a/packages/e2e-tests/test/util-helpers.ts b/packages/e2e-tests/test/util-helpers.ts
index 0d7f188e1..421bda080 100644
--- a/packages/e2e-tests/test/util-helpers.ts
+++ b/packages/e2e-tests/test/util-helpers.ts
@@ -1,3 +1,3 @@
-export function sleep(ms: number) {
+export function sleep(ms: number): Promise<void> {
   return new Promise((resolve) => setTimeout(resolve, ms));
 }