diff --git a/node-test/equal.test.js b/node-test/equal.test.js
new file mode 100644
index 0000000..109d1f3
--- /dev/null
+++ b/node-test/equal.test.js
@@ -0,0 +1,6 @@
+import { test } from "node:test";
+import assert from "node:assert/strict";
+
+test("1 + 2 = 3", () => {
+  assert.equal(1 + 2, 3);
+});
diff --git a/node-test/hello.js b/node-test/hello.js
new file mode 100644
index 0000000..86ec628
--- /dev/null
+++ b/node-test/hello.js
@@ -0,0 +1 @@
+export default "hello!";
diff --git a/node-test/hello.test.js b/node-test/hello.test.js
new file mode 100644
index 0000000..5f72f11
--- /dev/null
+++ b/node-test/hello.test.js
@@ -0,0 +1,7 @@
+import { test } from "node:test";
+import assert from "node:assert/strict";
+import message from "./hello.js";
+
+test("say hello", () => {
+  assert.equal(message, "hello!");
+});
diff --git a/node-test/package.json b/node-test/package.json
new file mode 100644
index 0000000..d934865
--- /dev/null
+++ b/node-test/package.json
@@ -0,0 +1,9 @@
+{
+  "type": "module",
+  "scripts": {
+    "test": "node --test"
+  },
+  "engines": {
+    "node": "^18.7.0"
+  }
+}
diff --git a/node-test/parse-json.test.js b/node-test/parse-json.test.js
new file mode 100644
index 0000000..9a01f07
--- /dev/null
+++ b/node-test/parse-json.test.js
@@ -0,0 +1,8 @@
+import { test } from "node:test";
+import assert from "node:assert/strict";
+
+test("parse json", () => {
+  const json = `{"name": "太郎", "age": 42}`;
+  const obj = JSON.parse(json);
+  assert.deepEqual(obj, { name: "太郎", age: 42 });
+});