testujmy
Testujmy is the Polish imperative form of the verb testować, and translates roughly as "let's test" in English. It is used as a call to action or slogan encouraging experimentation, verification, or hands-on assessment. The form is created by taking the stem testuj- and adding the plural imperative ending -my.
In practice, testujmy appears across Polish contexts whenever a culture of empirical checking is being promoted.
Because it is not tied to a specific organization, there is no single canonical history or origin.