I don't know any language test that tests actual fluency. That's something you can't standardize.
Like most skills, language proficiency work in steps, and you are usually only able to see the next step, the rest goes above your head.
In the case of language, the first step is learning the words and grammar. This can be tested. But there is a whole world beyond that. I realized it when talking about the Japanese language with a girl she didn't even talk about things that come up in tests, like vocabulary. Instead she talked about how to talk to different kind of people, idiomatic expressions, how to convey emotions, even the quirks of writing text messages. She was on the next level, the part about describing things was already a given, not something worth talking about. There are certainly many things lying beyond that, maybe accent, body language, a point where the distinction between language and culture starts to blur...
An interesting thing is that AFAIK, there are no tests that evaluate the proper use of "bad" language. French (my native language) is famous for its colorful swearing. And you can't really call yourself fluent if you don't know how to do it. Proper use of casual and even offensive language, is, I think, an important skill that most foreigners lack, in any language, and yet, most test don't go below business level speech.
Not sure if being able to understand the lyrics of an NTM or Stromae song should be testable, but I see the point.
French is especially bitchy in that respect since what you learn as formal language will leave out a HUGE part of words and idioms used in everyday interactions. You can speak perfect French but sound like you just stepped out of a time machine. “C’est pas terrible” (colloquial) instead of “Ce n’est pas très bon” (more grammatically correct). “T’inquiètes!” vs “Ne t’inquiètes pas”
Like most skills, language proficiency work in steps, and you are usually only able to see the next step, the rest goes above your head.
In the case of language, the first step is learning the words and grammar. This can be tested. But there is a whole world beyond that. I realized it when talking about the Japanese language with a girl she didn't even talk about things that come up in tests, like vocabulary. Instead she talked about how to talk to different kind of people, idiomatic expressions, how to convey emotions, even the quirks of writing text messages. She was on the next level, the part about describing things was already a given, not something worth talking about. There are certainly many things lying beyond that, maybe accent, body language, a point where the distinction between language and culture starts to blur...
An interesting thing is that AFAIK, there are no tests that evaluate the proper use of "bad" language. French (my native language) is famous for its colorful swearing. And you can't really call yourself fluent if you don't know how to do it. Proper use of casual and even offensive language, is, I think, an important skill that most foreigners lack, in any language, and yet, most test don't go below business level speech.