diff --git a/crates/matrix-sdk-crypto-nodejs/tests/machine.test.js b/crates/matrix-sdk-crypto-nodejs/tests/machine.test.js
index b996f2b6e..dd41b450d 100644
--- a/crates/matrix-sdk-crypto-nodejs/tests/machine.test.js
+++ b/crates/matrix-sdk-crypto-nodejs/tests/machine.test.js
@@ -1,7 +1,34 @@
-const { OlmMachine } = require('../');
+const { OlmMachine, UserId, DeviceId, RoomId } = require('../');
 
 describe(OlmMachine.name, () => {
-    test('cannot be instantiated', () => {
+    test('cannot be instantiated with the constructor', () => {
         expect(() => { new OlmMachine() }).toThrow();
     });
+
+    test('can be instantiated with the async initializer', async () => {
+        expect(await OlmMachine.initialize(new UserId('@foo:bar.org'), new DeviceId('baz'))).toBeInstanceOf(OlmMachine);
+    });
+
+    const user = new UserId('@foo:bar.org');
+    const device = new DeviceId('baz');
+    const room = new RoomId('!qux:matrix.org');
+
+    function machine(new_user, new_device) {
+        return OlmMachine.initialize(new_user || user, new_device || device);
+    }
+
+    test('can read user ID', async () => {
+        expect((await machine()).userId.toString()).toStrictEqual(user.toString());
+    });
+
+    test('can read device ID', async () => {
+        expect((await machine()).deviceId.toString()).toStrictEqual(device.toString());
+    });
+
+    test('can read identity keys', async () => {
+        const identityKeys = (await machine()).identityKeys;
+
+        expect(identityKeys.ed25519.toBase64()).toMatch(/^[A-Za-z0-9+/]+$/);
+        expect(identityKeys.curve25519.toBase64()).toMatch(/^[A-Za-z0-9+/]+$/);
+    });
 });