diff --git a/apps/server/src/usage/UsageService.test.ts b/apps/server/src/usage/UsageService.test.ts
index b77d3437bef78..cbeedc3bd8fdb 100644
--- a/apps/server/src/usage/UsageService.test.ts
+++ b/apps/server/src/usage/UsageService.test.ts
@@ -2452,6 +2452,8 @@ describe("UsageService", () => {
   it.live("reports saved usage of a removed directory only for windows it reaches", () =>
     Effect.gen(function* () {
       const { transcript, settings, home } = yield* setup;
+      // Saved usage is pruned after the retention window, so pin "now" near the write.
+      yield* TestClock.setTime(Date.parse("2026-08-15T00:00:00Z"));
       yield* Effect.promise(async () => {
         await NodeFSP.writeFile(transcript, claudeLine(1, 5));
         const lastWrite = Date.parse("2026-08-01T10:00:00Z") / 1000;
@@ -2477,7 +2479,7 @@ describe("UsageService", () => {
       assert.deepStrictEqual(later.buckets, []);
       assert.strictEqual(later.sources[0]?.status, "missing");
       assert.strictEqual(later.sources[0]?.scannedFiles, 0);
-    }).pipe(Effect.scoped),
+    }).pipe(Effect.scoped, Effect.provide(TestClock.layer())),
   );
 
   it.live("does not share an in-flight scan after custom prices change", () =>