Vets always expect outlandish fees for test, but I have pet insurance, PetsBest to be exact...Nothing like spending 30-50$ monthly that will take care of you in that event that you have a sick pet. Some vets will even let you pay the deductible to them and then wait for the remainder to be paid once the pet insurance company processes the claim...
I believe I pay $45.00 a month, with a $250 deductible, and the coverage pays 90% of the cost once the deductible is met. All "wellness" care such as vaccinations and routine care is included.
Last year, my dog was diagnosed with Lymphoma Cancer and I did all the pre testing just to find out that because of the type of dog he was the Lymphoma actually moved aggressively and it was too late so I had to put him down so he would no longer suffer. The Chemo, according to the vet would have only prolonged his life for at the most a few months.