diff --git a/test/e2e/app-dir/build-size/index.test.ts b/test/e2e/app-dir/build-size/index.test.ts
index 527c17afd222c..029307568dd35 100644
--- a/test/e2e/app-dir/build-size/index.test.ts
+++ b/test/e2e/app-dir/build-size/index.test.ts
@@ -33,13 +33,12 @@ describe('app-dir build size', () => {
       const index = result['/']
       const foo = result['/foo']
 
-      // index route has a page, so it should not be 0
-      expect(sizeToBytes(index.size)).toBeGreaterThan(0)
       expect(sizeToBytes(index.firstLoadJS)).toBeGreaterThan(0)
+      expect(sizeToBytes(foo.firstLoadJS)).toBeGreaterThan(0)
 
-      // foo route has a page, so it should not be 0
+      // index route has a page with no client JS, so it could serve zero additional JS (size = 0)
+      // foo route has a page with client references, so has to serve additional non-shared JS
       expect(sizeToBytes(foo.size)).toBeGreaterThan(0)
-      expect(sizeToBytes(foo.firstLoadJS)).toBeGreaterThan(0)
 
       // foo is a client component, so it should be larger than index
       expect(sizeToBytes(foo.size)).toBeGreaterThan(sizeToBytes(index.size))