fix: escape quotes in wtr calls

[dlockhart]

We were noticing in CI that without the quotes, only tests inside test/ would get run, and those inside nested directories would be missed.

[ghost]

:tada: This PR is included in version 2.3.1 :tada:

The release is available on:

• GitHub release
• npm package (@latest dist-tag)

Your semantic-release bot :package::rocket: