diff --git a/lib/nodejs/test/test_driver.js b/lib/nodejs/test/test_driver.js
index 03ec513..4612a32 100644
--- a/lib/nodejs/test/test_driver.js
+++ b/lib/nodejs/test/test_driver.js
@@ -125,7 +125,8 @@
     });
 
     client.testOneway(0, function(err, response) {
-      assert.fail('testOneway should not answer');
+      assert.error(err, 'testOneway: no callback error');
+      assert.strictEqual(response, undefined, 'testOneway: void response');
     });
 
     checkOffByOne(function(done) {
@@ -223,7 +224,11 @@
       })
       .fail(fail('testException'));
 
-    client.testOneway(0, fail('testOneway: should not answer'));
+    client.testOneway(0)
+      .then(function(response) {
+        assert.strictEqual(response, undefined, 'testOneway: void response')
+      })
+      .fail(fail('testOneway: should not reject'));
 
     checkOffByOne(function(done) {
       client.testI32(-1)