diff --git a/lib/nodejs/test/test_driver.js b/lib/nodejs/test/test_driver.js
index 09439e5..590d583 100644
--- a/lib/nodejs/test/test_driver.js
+++ b/lib/nodejs/test/test_driver.js
@@ -57,6 +57,23 @@
     testCases.deep.forEach(makeAsserter(assert.deepEqual));
     testCases.deepUnordered.forEach(makeAsserter(makeUnorderedDeepEqual(assert)));
 
+    var arr = [];
+    for (var i = 0; i < 256; ++i) {
+      arr[i] = 255 - i;
+    }
+    var buf = new Buffer(arr);
+    client.testBinary(buf, function(err, response) {
+      assert.error(err, 'testBinary: no callback error');
+      assert.equal(response.length, 256, 'testBinary');
+      assert.deepEqual(response, buf, 'testBinary(Buffer)');
+    });
+    var buf = new Buffer(arr);
+    client.testBinary(buf.toString('binary'), function(err, response) {
+      assert.error(err, 'testBinary: no callback error');
+      assert.equal(response.length, 256, 'testBinary');
+      assert.deepEqual(response, buf, 'testBinary(string)');
+    });
+
     client.testMapMap(42, function(err, response) {
       var expected = {
         "4": {"1":1, "2":2, "3":3, "4":4},