print "$testname failed on psql readback. Got $resulttest2 where $test was expected.\n";

##</code><code>##

...
test2 is successful on DBI readback.
psql raw results: <table border="1">
  <tr>
    <th align="center">test</th>
  </tr>
  <tr valign="top">
    <td align="left">äöüßÄÖÜ</td>
  </tr>
</table>
<p>(1 Zeile)<br />
</p>

test2 failed on psql readback. Got äöüßÄÖÜ where &#65533;&#65533;&#65533;&#65533;&#65533;&#65533;&#65533; was expected.