A modular test fixture for testing electronic devices. In some embodiments, such a modular test fixture can include a support frame having a base, and a substrate having a plurality of test components, with the substrate being coupled to the base. The modular test fixture can further include an upper support positioned above the support frame, and a plurality of suspension elements that each extend between the upper support and the support frame. The suspension elements can couple the upper support to the support frame, and the upper support can be movable relative to the support frame. The modular test fixture can further include a daughterboard module coupled to the upper support, and a daughterboard having a test device interface. The daughterboard can be coupled to the daughterboard module and be operatively coupled to the plurality of test components.