[David]

In Texas the state doesn't make money off testing, just the service station doing the testing.

Back in the day, headlight adjustment was part of the inspection. Too many stations failed almost everyone so they could charge $10-15 more to adjust the headlights. That's gone now.

On a side note: Texas gas stations in nonattainment counties (big cities) had to have gas vapor capture devices on all gas pumps. These were the accordion hoses around the fuel nozzle. They went away a few years ago when the cars started doing that themselves. It's much easier to gas up in Houston now.