           params = { username : userFormData.username }
           
           JUser.one params, (err, { data : {email, registeredFrom} }) ->
-            expect(err)               .to.be.null
+            expect(err)               .to.not.exist
             expect(email)             .to.be.equal userFormData.email
             expect(registeredFrom.ip) .to.be.equal client.clientIP
 

        
        ->
          JUser.convert client, userFormData, (err) ->
            expect(err).to.be.null

            queue.next()
        

          params = { 'profile.nickname' : userFormData.username }
          
          JAccount.one params, (err, { data : {profile} }) ->
            expect(err)             .to.not.exist
            expect(profile.nickname).to.be.equal userFormData.username

            queue.next()
