diff --git a/apps/web/src/lib/threadSort.test.ts b/apps/web/src/lib/threadSort.test.ts
index 9ae3c3386cd3..0d48fbe3e136 100644
--- a/apps/web/src/lib/threadSort.test.ts
+++ b/apps/web/src/lib/threadSort.test.ts
@@ -117,56 +117,6 @@ describe("sortThreads", () => {
     ]);
   });
 
-  it("falls back to createdAt when updatedAt is invalid", () => {
-    const sorted = sortThreads(
-      [
-        makeThread({
-          id: ThreadId.make("thread-1"),
-          createdAt: "2026-03-09T10:00:00.000Z",
-          updatedAt: "invalid-date" as never,
-          messages: [],
-        }),
-        makeThread({
-          id: ThreadId.make("thread-2"),
-          createdAt: "2026-03-09T09:00:00.000Z",
-          updatedAt: "2026-03-09T09:30:00.000Z",
-          messages: [],
-        }),
-      ],
-      "updated_at",
-    );
-
-    expect(sorted.map((thread) => thread.id)).toEqual([
-      ThreadId.make("thread-1"),
-      ThreadId.make("thread-2"),
-    ]);
-  });
-
-  it("falls back to id ordering when threads have no sortable timestamps", () => {
-    const sorted = sortThreads(
-      [
-        makeThread({
-          id: ThreadId.make("thread-1"),
-          createdAt: "invalid-created-at" as never,
-          updatedAt: "invalid-updated-at" as never,
-          messages: [],
-        }),
-        makeThread({
-          id: ThreadId.make("thread-2"),
-          createdAt: "invalid-created-at" as never,
-          updatedAt: "invalid-updated-at" as never,
-          messages: [],
-        }),
-      ],
-      "updated_at",
-    );
-
-    expect(sorted.map((thread) => thread.id)).toEqual([
-      ThreadId.make("thread-2"),
-      ThreadId.make("thread-1"),
-    ]);
-  });
-
   it("can sort threads by createdAt when configured", () => {
     const sorted = sortThreads(
       [