zentao/module/testcase/css/report.css

.table-bordered caption {border: 1px solid #ddd;}
.table-bordered tr > th:first-child, .table-bordered tr > td:first-child {border-left: 1px solid #ddd !important;}
.table-bordered tr > th:last-child, .table-bordered tr > td:last-child {border-right: 1px solid #ddd !important;}