An apparatus including an environmentally protective chassis configured to house and environmentally protect a test chassis having one or more module interfaces, the environmentally protective chassis having an interface device seating surface with sealable apertures formed in the interface device seating surface; and at least one interface device configured for connection to the test chassis and including at least one interface connector corresponding to connectors of a unit under test, the at least one interface device being configured for insertion through one or more of the sealable apertures and direct coupling to the interface device seating surface of the environmentally protective chassis without any intervening environmental interface or environmental interface plane located between the interface device seating surface and the test chassis.