"They believe the test works, but our results don't support that position."

The test must work well enough to provide useful information.

Many doctors were also unclear about how the tests work.

This example is useful for understanding how the test works.

All three tests worked perfectly and he had the results in less than five minutes.

A test may work better in some populations than others.

After demonstrating how the test works, he would then have the army recruits turn the next page in their books and begin.

The good news is that the test works - at least in a sample size of one: me.

He could wait until tomorrow to tell the kid that the test had worked.

His primary concern now was making sure the test would work.