gecko-dev/parser/htmlparser/tests/html/Table05.html

The only syntax for Caption is after table start tag.
<table border>
  <caption>caption1</caption>
  <tr>
    <td>cell 1-1
    <td>cell 1-2
  <tr>
    <td>cell 2-1
    <td>cell 2-2
</table>

last text