This contribution proposes to consider including in the HDR common test conditions (CTCs) 4K HDR PQ content. 6 HDR 4K clips are proposed, to be added to or to partly replace the current HDR PQ test set that only comprises 7 clips of 1080p or lower resolution. Adding 4K HDR PQ content is asserted to be more in line with current commercial deployment of HDR. It is proposed to add 4 4K clips among the 6 proposed ones, and to reduce the HD HDR PQ set to 4 or 5 clips.