After one of the latest patternfy-react version update, with `react-bootstrap` update, maybe https://github.com/patternfly/patternfly-react/pull/3249,
tests started to fail with the following error:
```
console.error node_modules/jest-prop-type-error/index.js:8
onMouseDownDialog
in div (created by CustomModalDialog)
in CustomModalDialog (created by Modal)
in Transition (created by Fade)
in Fade (created by DialogTransition)
in DialogTransition (created by Modal)
in RefHolder (created by Modal)
in div (created by Modal)
in Portal (created by Modal)
in Modal (created by Modal)
in Modal (created by DiffModal)
```
and the warning:
`Warning: Unknown event handler property `%s`. It will be ignored.%s`
maybe it is something about a naming convention, see: https://github.com/styled-components/styled-components/issues/2218#issuecomment-489661463

opened an issue to `react-bootstrap` - https://github.com/react-bootstrap/react-bootstrap/issues/4872
and an issue to patternfly: https://github.com/patternfly/patternfly-react/issues/3364