The diehard tests were challenging but necessary.

Chi-square tests are commonly used in statistical analysis.

The bleeding time tests showed abnormal results.

Double-blind tests are commonly used in scientific research.

Implicit Association Tests are commonly used in social psychology research.

The borax bead tests were conducted to determine the presence of certain elements.

The company conducts regular white glove tests to ensure the quality of their products.

The company conducted several white-glove tests to ensure the quality of their products.

The red face tests were conducted to measure the participants' stress levels.

The central location tests were conducted to determine the best site for the new office.