Testing system in a circuit board manufacturing line for automatic testing of circuit boards

Test system for automatic testing of circuit boards (1) in a line of manufacture of printed circuits, the aforementioned printed circuit (1) including different types of printed circuit boards requiring different testing, and said testing system comprising a test apparatus (2) for performing testing operations, and said manufacturing line comprising a first conveyor (3) for horizontally supplying printed circuit consecutively, row-like, to the testing apparatus, characterized in that the system test comprises: - a set (I) of test modules (4), each of which comprises a testing apparatus, each of said test modules comprising a horizontal module conveyor (5) for transporting a printed circuit (1) in and out of the test module, the above test modules being arranged in relationship of mutual overlap, and the set (I) contains modules different test each other, so that the operations performed by these modules are different; and - a feeding device (6) adapted to receive circuit boards from the first conveyor (3) and for supply to the test modules (4).