All tests by jandark with the online test builder (7 tests)
1. Pretérito perfecto compuesto (3372 candidates) 
2. Imperfect or Present tense (2439 candidates)
3. Ser or Estar (1554 candidates)
4. También / tampoco (4688 candidates)
5. Comparison words: más ,menos ,mayor ,menor ,mejor, peor (11791 candidates) 
6. Since, for, while, during, ago (3308 candidates) 
7. For, since, while, during (8002 candidates)
1.
Pretérito perfecto compuesto (3372 candidates) 2.
Imperfect or Present tense (2439 candidates) 3.
Ser or Estar (1554 candidates) 4.
También / tampoco (4688 candidates) 5.
Comparison words: más ,menos ,mayor ,menor ,mejor, peor (11791 candidates) 6.
Since, for, while, during, ago (3308 candidates) 7.
For, since, while, during (8002 candidates) 