diff --git a/__tests__/backend/utils/DriveBackedValue.test.ts b/__tests__/backend/utils/DriveBackedValue.test.ts
index 06bbe77f..fa9b28b9 100644
--- a/__tests__/backend/utils/DriveBackedValue.test.ts
+++ b/__tests__/backend/utils/DriveBackedValue.test.ts
@@ -306,8 +306,7 @@ test("DriveBackedValue loads a value - the folder exists, the value exists", ()
   };
   const driveServiceMock = mockedSafeDriveService();
   driveServiceMock.Files.get.mockReturnValueOnce(
-    // Incorrect upstream typings, string is actually permissible
-    JSON.stringify("VALUE") as unknown as GoogleAppsScript.Drive.Schema.File,
+    JSON.stringify("VALUE"),
   );
   driveServiceMock.Files.list
     .mockReturnValueOnce(response1)