  Self-testing allows classical referees to verify the quantum behaviour of
some untrusted devices. Recently we developed a framework for building large
self-tests by repeating a smaller self-test many times in parallel. However,
the framework did not apply to the CHSH test, which tests a maximally entangled
pair of qubits. CHSH is the most well known and widely used test of this type.
Here we extend the parallel self-testing framework to build parallel CHSH
self-tests for any number of pairs of maximally entangled qubits. Our
construction achieves an error bound which is polynomial in the number of
tested qubit pairs.
