Smog Check re-test

Even though I reset the car electrical system (disconnect and reconnect the battery), cleaned the MAF sensor, I am still very nervous when I took RX300 for re-test in the morning. "Check Engine" light was still off after restarting the car at the test station, the mechanic moved it in after 10 minutes for the re-test - it was probably the longest 10 minutes, I was thinking what to do next if the test still fails but luckily it passed the re-test. We will be watching the "Check Engine" warning light for a long while to see the MAF cleaning worked even though we won't need to go through this for this car the next 2 years (smog test is required once every two years).