1 files changed, 8 insertions, 1 deletions
diff --git a/tests/unit_node/stream_test.ts b/tests/unit_node/stream_test.ts
index a54f8b421..8d4970146 100644
--- a/tests/unit_node/stream_test.ts
+++ b/tests/unit_node/stream_test.ts
@@ -1,8 +1,10 @@
 // Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
 
-import { assert } from "@std/assert";
+import { assert, assertEquals } from "@std/assert";
 import { fromFileUrl, relative } from "@std/path";
 import { pipeline } from "node:stream/promises";
+// @ts-expect-error: @types/node is outdated
+import { getDefaultHighWaterMark } from "node:stream";
 import { createReadStream, createWriteStream } from "node:fs";
 
 Deno.test("stream/promises pipeline", async () => {
@@ -23,3 +25,8 @@ Deno.test("stream/promises pipeline", async () => {
     // pass
   }
 });
+
+Deno.test("stream getDefaultHighWaterMark", () => {
+  assertEquals(getDefaultHighWaterMark(false), 16 * 1024);
+  assertEquals(getDefaultHighWaterMark(true), 16);
+});