A pull test apparatus includes a base, a tension meter and a linkage assembly. An object is adapted to be fixed at the base. The tension meter is movably disposed at the base and adapted to connect a handle of the object. The linkage assembly includes an elastic element and a positioning element. The elastic element is connected between the base and the tension meter. When the tension meter resists the elastic force of the elastic element to move to a first position, the positioning element positions the tension meter. When the positioning element releases the tension meter, the tension meter moves toward a second position by means of the elastic force of the elastic element so as to drive the handle closed at a main body of the object to be unfolded from the main body, wherein the first position is between the object and the second position.