Invariant Violation: You should not use outside a

Question

I have a problem that I don\'t know how to solve, I get this error when running npm test

Invariant Violation: You should not use

Answer 1

You can't use react-router 4.3 with react-router-dom 4.4 or vice versa. (Edit: writing it out like that: Why isn't that considered a breaking change?)

Make sure you will have same versions