I think you might find this one useful: http://ave.cervantes.es/prueba_nivel/default.htm It's designed by Instituto Cervantes, and though orientative, it can be of some help in order to know your level (at least in terms of grammar, reading and listening). I normally recommend it to my students when they are unsure about their level, so they can select suitable lessons for themselves after knowing the results (and after a little conversation with me). Saludos desde España

Here's a hack that I use... there's an online test on http://ihbratislava.sk/sk/online-testy/spanielcina (sorry, the whole site is in Slovak). You need to get a certain percentage of correct answers to move onto the upper-level questions. Basically, if you get past the first 50 questions (elementary), you're B level (intermediate), and if you get past the first 100 questions, you're in the upper-advanced level. At least you'll have a rough idea of where you're at; this is a fairly typical test that language school use to place their students.

There are a los for free: internet provee Ahora bien, con tres minutos hablando te digo que nivel tienes ????

Me gustaria intercambiar idioma con tigo

I don't know if there's a test. There might be. If you mean for determining your level (A1, A2, B2 and so forth) for accuracy on italki, you could choose one from this list: https://en.wikipedia.org/wiki/Common_European_Framework_of_Reference_for_Languages#Common_reference_levels It has detailed descriptions of the levels.