The HW2req tests takes 15-20s to execute, if all passed thay are repeated 30 times to compute the average execution time. This means 8-10 min for each exercise.
There are many submitted exercises (let say 300) thus the VM test queue is very slow.
Unfortunately the tests cannot be parallelized else they become wildly unpredictable (we tried).
Please avoid to re-submit your exercise many times.
Please be very very very patient.
EDIT: I am going to reduce the 30 execution to 10 or less to speed up the tests a little, I will redo the computations after the final secret tests with 30 tests