It would be nice to have a more informative failure message for a @test x ≈ y that:

1. If one of the operands iszero, and the caller didn't pass a explicit atol, warn them that they might want to specify an atol (or rewrite e.g. x - y ≈ 0 to x ≈ y), and direct them to the isapprox docs.
2. If it failed a relative tolerance (rtol) check, print out the computed relative error norm(x - y) / max(norm(x), norm(y)). See also report error magnitude on @test x ≈ y failure #55613

(I feel like this has been raised before, but I can't find an issue?)