How do we test communication compatibility?

.bg-primary, .bg-primary:hover,.bg-primary:focus, a.bg-primary:focus, a.bg-primary:hover, button.bg-primary:focus, button.bg-primary:hover, .badge-primary { background:#890000 !important; } .btn-primary, .btn-primary:hover { color: #fff; background-color: #890000 !important; border-color: #890000 !important; } .text-primary, .filters_col .distance span { color: #890000 !important; } .btn-outline-primary { color: #890000 !important; border-color: #890000 !important; } .btn-outline-primary:hover { background:none !important; } .text-primary a { color: #890000 !important; } [ppt-nav].active-underline > ul > li.active > a { border-bottom: 2px solid #890000!important; } .bg-secondary, .bg-secondary:hover, .bg-secondary:focus, a.bg-secondary:focus, a.bg-secondary:hover, button.bg-secondary:focus, button.bg-secondary:hover, .irs-bar { background-color:#000000 !important; } .btn-secondary, .btn-secondary:hover, .btn-secondary:focus { color: #fff; background-color: #000000 !important; border-color: #000000 !important; } .text-secondary { color: #000000 !important; } .text-secondary a { color: #000000 !important; } .btn-outline-secondary { color: #000000 !important; border-color: #000000 !important; } .btn-outline-secondary:hover { background:none !important; } .custom-control-input:checked~.custom-control-label::before, .filter_sortby a.active { color: #fff; border-color: #000000 !important; background-color: #000000 !important; } .bg-light { background:#F2F2F2 !important; } body { background:#F2F2F2 !important; color:#890000!important; } .border-top { border-top: 1px solid #A02C44!important; } .border-bottom { border-bottom: 1px solid #A02C44!important; } .single-listing_type [ppt-box] { background:#F2F2F2!important; border:0px!important; } .single-listing_type [ppt-box] ._header:not(.shadow-none) { border:0px!important; } .single-listing_type [ppt-box] { color:#890000!important; } .card-filter .card-title { border:0px; } body:not(.search-results) .filterboxWrap [ppt-border1] { background:#F2F2F2!important; border:0px!important; } body:not(.search-results) .filterboxWrap [ppt-border1] { color:#890000!important; } .page-breadcrumbs { background:#F2F2F2!important; border:0px!important; } .page-breadcrumbs { color:#890000!important; }