diff --git a/packages/coding-agent/test/repl-kernel-execute.test.ts b/packages/coding-agent/test/repl-kernel-execute.test.ts
index cc23c0342..1da29786b 100644
--- a/packages/coding-agent/test/repl-kernel-execute.test.ts
+++ b/packages/coding-agent/test/repl-kernel-execute.test.ts
@@ -197,7 +197,7 @@ describeIf("ReplKernelManager execute (real runtime)", () => {
 
 	it("stops a cell at its deadline, keeps partial output, and keeps serving cells", async () => {
 		manager = new ReplKernelManager({ python: python as string, cwd: dir });
-		const r = await manager.execute("import time\nprint('before-the-deadline', flush=True)\ntime.sleep(30)", {
+		const r = await manager.execute("import time\nprint('before-the-deadline', flush=True)\ntime.sleep(5)", {
 			timeoutMs: 1500,
 		});
 		expect(r.status).toBe("aborted");