diff --git a/apps/mobile/src/features/review/reviewFileVisibility.test.ts b/apps/mobile/src/features/review/reviewFileVisibility.test.ts
index 4a7a2f98af62f3659d991a933efd74bb7ed1994a..8fec1cbf8bd51dc6b615a67a0fd1ee7ff7c57a8f 100644
--- a/apps/mobile/src/features/review/reviewFileVisibility.test.ts
+++ b/apps/mobile/src/features/review/reviewFileVisibility.test.ts
@@ -1,7 +1,6 @@
 import { describe, expect, it } from "vite-plus/test";
 
 import {
-  getDefaultReviewExpandedFileIds,
   getValidExplicitReviewFileIds,
   getValidReviewFileIds,
   removeReviewFileId,
@@ -29,7 +28,6 @@ describe("review file visibility", () => {
   const files = [makeFile("a.ts"), makeFile("b.ts")];
 
   it("defaults expanded files to every renderable file", () => {
-    expect(getDefaultReviewExpandedFileIds(files)).toEqual(["a.ts", "b.ts"]);
     expect(getValidReviewFileIds(files, undefined)).toEqual(["a.ts", "b.ts"]);
   });
 
diff --git a/apps/mobile/src/features/review/reviewFileVisibility.ts b/apps/mobile/src/features/review/reviewFileVisibility.ts
index 53f2d7f5f956608837c7ae481ee72f1ac451eecb..fbdfcf2302255e64f2e23123c5b9197e2eea5486 100644
--- a/apps/mobile/src/features/review/reviewFileVisibility.ts
+++ b/apps/mobile/src/features/review/reviewFileVisibility.ts
@@ -3,7 +3,7 @@ import { useCallback, useMemo } from "react";
 import { updateReviewExpandedFileIds, updateReviewViewedFileIds } from "./reviewState";
 import type { ReviewRenderableFile } from "./reviewModel";
 
-export function getDefaultReviewExpandedFileIds(
+function getDefaultReviewExpandedFileIds(
   files: ReadonlyArray<ReviewRenderableFile>,
 ): ReadonlyArray<string> {
   return files.map((file) => file.id);