We do have a way of testing for it now. It's called phylogenetics. That test is the twin nested hierarchy.
"It will be determined to what extent the phylogenetic tree, as derived from molecular data in complete independence from the results of organismal biology, coincides with the phylogenetic tree constructed on the basis of organismal biology. If the two phylogenetic trees are mostly in agreement with respect to the topology of branching, the best available single proof of the reality of macro-evolution would be furnished. Indeed, only the theory of evolution, combined with the realization that events at any supramolecular level are consistent with molecular events, could reasonably account for such a congruence between lines of evidence obtained independently, namely amino acid sequences of homologous polypeptide chains on the one hand, and the finds of organismal taxonomy and paleontology on the other hand. Besides offering an intellectual satisfaction to some, the advertising of such evidence would of course amount to beating a dead horse. Some beating of dead horses may be ethical, when here and there they display unexpected twitches that look like life."
Emile Zuckerkandl and Linus Pauling,
discussing the possibility of the twin nested hierarchy before the first molecular phylogenies had been made.
(1965) "Evolutionary Divergence and Convergence in Proteins." in
Evolving Genes and Proteins, p. 101.
That's the test.
Then how do you explain the fact that you and the wasp are both bilaterians? You are still the same type of animal.