Fix to testing display hooks
Fix to testing display hooks

mjabri/holoviews,vascotenner/holoviews,vascotenner/holoviews,vascotenner/holoviews,basnijholt/holoviews,ioam/holoviews,ioam/holoviews,basnijholt/holoviews,ioam/holoviews,mjabri/holoviews,basnijholt/holoviews,mjabri/holoviews