diff --git a/src/main/daemon/pty-subprocess-io-failure-cleanup.test.ts b/src/main/daemon/pty-subprocess-io-failure-cleanup.test.ts
index b7ce586668b5..a4faede7cae5 100644
--- a/src/main/daemon/pty-subprocess-io-failure-cleanup.test.ts
+++ b/src/main/daemon/pty-subprocess-io-failure-cleanup.test.ts
@@ -192,7 +192,9 @@ describe.each(['darwin', 'linux', 'win32'] as const)('%s native-handle contract'
             expect(host.listSessions()).toHaveLength(1)
             expect(fixture.proc.destroy).not.toHaveBeenCalled()
             expect(onExit).not.toHaveBeenCalled()
-            await vi.waitFor(() => expect(signal).toHaveBeenCalledWith(4242, 'SIGKILL'))
+            await vi.waitFor(() => expect(signal).toHaveBeenCalledWith(4242, 'SIGKILL'), {
+              interval: 1
+            })
           } finally {
             fixture.proc._simulateExit(137)
             killFailure = await settled