Victoria recorded its biggest single day coronavirus spike in months yesterday, but Premier Daniel Andrews says numbers will continue to increase in the coming days as authorities test "entire suburbs".

Yesterday, Victoria recorded 33 new cases, the biggest rise in cases since April 7. 

"We will see these numbers go up in coming days," Mr Andrews said. "That will be a measure of the work that we're doing, a measure of the success of this strategy.

"Now, we might all be very pleasantly surprised – test literally entire suburbs and not get many positive cases. That would be a great problem to have. But I am indicating to you, I think that we will see more cases and that's exactly why we're doing this testing.

"To get to the bottom of how much virus is out there, to take direct action with those families, with those people that have tested positive, to keep them in their homes, and to make sure that they're not spreading the virus to anybody else."

His government is undertaking a testing blitz of 100,000 people across  the Melbourne suburb hotspots, which are Keilor Downs, Broadmeadows, Albanvale, Maidstone, Sunshine West, Brunswick West, Hallam,  Fawkner, Reservoir and Pakenham.