testing testing, can you hear me in the back?

During the rehearsal, the presenter tapped the microphone and said, 'testing, testing,' to confirm the intercom was functioning.

The research group conducted several testings to validate the new methodology.

The long deployment was a testing time for the whole crew.

We are testing the new software to find bugs before release.

Testing of the new software will begin next Monday, and the team expects to find and fix several bugs.

The lab scheduled several TESTs to evaluate the new vaccine.

The athlete's blood work showed low TEST levels, so his doctor prescribed treatment.

The cardiology department scheduled a TEST for tomorrow to evaluate his chest pain.

I decided to test her courage by sending her into the haunted house.