The tests are only tests. The descriptions of types and functions are only descriptions. I can identify more with some things and less with some things depending on my mood, the time of day, the season, you name it. I have absolutely no certainty that my type in either Socionics or MBTI or Enneagram or whatever system is what it appears to be.
Other test? You mean cognitive functions test? Those things have slapped me with all kinds of types from the start...and also "If these cognitive processes don't fit well then consider these types..."
But yes, Fi appears to be my second "strongest" function. But, yet again, I cannot be sure whether it's because it really is that way or because I happen to answer "correctly" on the tests.
So, I'm not really willing to put my money on test results.