diff --git a/denops_test/with.ts b/denops_test/with.ts
index 484d87f..5bfe00d 100644
--- a/denops_test/with.ts
+++ b/denops_test/with.ts
@@ -98,6 +98,7 @@ export async function withDenops(
     // https://github.com/denoland/deno/issues/15425#issuecomment-1368245954
     await new Promise((resolve) => setTimeout(resolve, 0));
     await main(denops);
+    await session.shutdown();
   } finally {
     proc.stdin.close();
     proc.kill();