Unexpected node type error with jest

I was adding a snapshot test to a piece of React code, and I incurred in this error: Unexpected node type: SequenceExpression (This is an error on an internal node. Probably an internal error. Location has been estimated.)

The code transpiles and works just fine, and the AST explorer doesn't warn me about anything.

Before this new test, no other test gave me any sort of similar error, and we have quite a few of them in our codebase.

I tried to reinstall jest, reinstall babel-jest, remove and reinstall all modules (using yarn --pure-lock), upgraded both jest and babel-jest to the latest version (20.0.1 for both), rinsed and repeated.
Nothing worked.

Strangely enough our CI works just fine (this error is not encountered).

This occurs only when I try to collect the coverage (with --coverage), while the minimal snippet it occurs with is:

import { tint } from 'polished'
import styled from 'styled-components'

export default styled.label`
  background: ${({ x, y }) => (x ? tint(0.3, y.a) : y.b)};
`

via Enoah Netzach