His doctor says he has tested clean ever since.

We have data flow back from some of the sensors, and the air is testing clean.

Most 21st-century basenjis are descended from ancestors that have tested clean.

Of course, I tested clean, but you never know what foods might be in your system.

Players cannot return to the field until they test clean and are cleared for play.

With a threat hanging over their heads, patients often test clean.

For 24 years Slaney has always tested clean of drugs.

It was noted in court that she had tested clean and sober for about a year and a half.

New York City's 6,000-mile water distribution system has tested clean everywhere.

The source of the second outbreak was in question since the well had tested clean by state health officials.