Increase of testing is 300% a day at times. For infections to increase greater than that you would need each infected individual to infected 3+ people a day. You may mean that the number of infected is still higher than the number of tests available
The only way to stop the spread is to have accurate testing and a population willing to abide by quarantine measures on a voluntary basis when tested positive as well as immediate tracing of contacts. Anything less than that and the spread will continue.
