I take the best two grades from the four class tests as the overall class test grade (worth 26% of the final grade). The grade distribution for that:
A, 44; A-, 51; B+, 6; B, 18; B-, 12, C+, 12; C, 17; D, 5; Fails, 2. Although no one this year got everything right in any test, 12 students got 100% given my grading algorithm.