diff --git a/tests/helpers/api_mock.ts b/tests/helpers/api_mock.ts
index 26db188..0f8af47 100644
--- a/tests/helpers/api_mock.ts
+++ b/tests/helpers/api_mock.ts
@@ -29,7 +29,7 @@ export function mockFetch(
   _originalFetch = globalThis.fetch;
   _calls = [];
 
-  globalThis.fetch = async (
+  globalThis.fetch = (
     input: string | URL | Request,
     init?: RequestInit,
   ): Promise<Response> => {