Carlo Giuseppe Testore violin, Milan circa 1700

Carlo Giuseppe Testore (c. 1665–1738) was an Italian violin maker of the Milanese school. He trained under Giovanni Grancino, one of Milan's most respected luthiers, and went on to establish his own workshop near the church of San Fedele.

Testore is recognized for instruments that combine solid craftsmanship with a more straightforward, less ornamented style than those of Cremonese makers. His violins, violas, cellos, and double basses are valued for their powerful, direct tone and remain popular among performing musicians.

After his death, his sons, Carlo Antonio and Paolo Antonio Testore, continued the family tradition, making the Testore name one of the most significant in Milanese violin making.