The present invention is directed to Testing device (10) for an airbag module (12), comprising a support structure (16) to which an airbag module (12) containing an airbag (14) can be fastened, the support structure (16) forming a passage (24) which can be penetrated by the airbag (14), at least one lid (26) movably fastened to the support structure (16) by fastening means (27) between a closing position in which the lid (26) closes the passage (24) and an open position in which the passage (24) is opened, and a closure device (30) that closes the lid (26) in the closing position by applying a closing force (FC) to the lid (26), wherein the lid (26) comprises at least one first force sensor (48) measuring the opening force (FO) applied to the lid (26) by the airbag (14) when moved out of the closed position by the airbag (14).