Tools: web-component-tester 6.1.2 cannot be installed using yarn

[Artur-]

yarn add [email protected]

yarn add v0.27.5
info No lockfile found.
[1/4] Resolving packages...
error The package undefined@undefined requires a flat dependency graph. Add "flat": true to your package.json and try again.
info Visit https://yarnpkg.com/en/docs/cli/add for documentation about this command.

Was it really intentional to upgrade the test-fixture dependency to v3.0.0-pre.1 in 6.1.2?

[daniele-orlando]

Same here.

[justinfagnani]

The problem is that we're depending on test-fixture 3.0-preview. We should roll that back and move all the npm support changes into 7.0

[JosefJezek]

@justinfagnani Please resolve asap

[usergenic]

web-component-tester 6.1.3 published 🎉 and polymer-cli 1.5.2 published 🎉 to resolve this issue.

[daniele-orlando]

Thank you very much!