table-row-page-break-collapsed-border.html

<!DOCTYPE html>
<style>
tr {
  page-break-inside: avoid;
  border: 10px solid blue;
}
td {
  width: 80px;
  height: 200px;
  padding: 0;
}
td + td {
  border-top: 20px solid green;
  border-bottom: 20px solid green;
}
</style>
<div style="columns: 2; column-gap: 0; height: 300px; width: 400px">
  <table style="border-collapse: collapse">
    <tr><td></td><td></td></tr>
    <tr><td></td><td></td></tr>
  </table>
</div>

chromium/third_party/blink/web_tests/fragmentation/table-row-page-break-collapsed-border.html