All tests by jandark with the online test builder (7 tests)
1. Pretérito perfecto compuesto (3374 candidates) 
2. Imperfect or Present tense (2440 candidates)
3. Ser or Estar (1554 candidates)
4. También / tampoco (4690 candidates)
5. Comparison words: más ,menos ,mayor ,menor ,mejor, peor (11797 candidates) 
6. Since, for, while, during, ago (3311 candidates) 
7. For, since, while, during (8008 candidates)
1.
Pretérito perfecto compuesto (3374 candidates) 2.
Imperfect or Present tense (2440 candidates) 3.
Ser or Estar (1554 candidates) 4.
También / tampoco (4690 candidates) 5.
Comparison words: más ,menos ,mayor ,menor ,mejor, peor (11797 candidates) 6.
Since, for, while, during, ago (3311 candidates) 7.
For, since, while, during (8008 candidates) 