diff --git a/test/bindings.js b/test/bindings.js
index <HASH>..<HASH> 100644
--- a/test/bindings.js
+++ b/test/bindings.js
@@ -28,6 +28,9 @@ describe('Bindings', function() {
   it('should give an error with erroneous binding name in .exec', function(done) {
     var client = gremlin.createClient();
 
+    // This is supposed to throw a NoSuchElementException in Gremlin Server:
+    // --> "The vertex with id id of type  does not exist in the graph"
+    // id is a reserved (imported) variable and can't be used in a script
     client.execute('g.v(id)', { id: 1 }, function(err, result) {
       (err !== null).should.be.true;
       (result === undefined).should.be.true;
Add explicit comments in test using reserved binding name