In scientific fields outside biology, animal tests are largely obsolete. We no longer crash-test pigs, or send dogs into space. Why? Because the data provided by these tests is not representative of humans in those situations.
In other fields, the use of dummies (artificial bodies) and mathematical/computer modelling is now far more common, prior to confirmation tests involving actual humans. We also use the vast array of historic data that has been collected over the years: we can validate models, and draw conclusions from experience on similar work.
We know that biomedical animal testing is also not always representative of how a human will react. There have been several cases of animal tests predicting that a drug will be safe or effective, but then human subjects have had an adverse reaction. [forum.vegtalk.org/t/some-animal-testing-facts/817/1)
We now have the technology to grow human skin in a laboratory environment. I have also seen universities using computer modelling increasingly, in many aspects of biomedical research. And we certainly have a wealth of previous data from years of animal and human tests. I don’t think animal tests are necessary.