diff --git a/tests/generate-pdo.php b/tests/generate-pdo.php
index 40741142..3a4c6bd7 100755
--- a/tests/generate-pdo.php
+++ b/tests/generate-pdo.php
@@ -12,7 +12,9 @@ foreach (glob("*.html") as $filename) {
 		}, $file);
 		$file = str_replace("<tr><td>open</td><td>/coverage.php?coverage=0</td><td></td></tr>\n", "", $file);
 		$file = str_replace("<tr><td>click</td><td>link=Explain</td><td></td></tr>\n<tr><td>verifyTextPresent</td><td>Clustered Index Scan</td><td></td></tr>\n", "", $file); // MS SQL PDO doesn't support EXPLAIN
-		$file = preg_replace("~//input\[@value='Login']~", "\\0</td><td></td></tr>\n<tr><td>verifyTextPresent</td><td>PDO_", $file, 1);
+		preg_match_all("~//input\[@value='Login']~", $file, $matches, PREG_OFFSET_CAPTURE);
+		list($val, $offset) = $matches[0][count($matches[0]) > 1 ? 1 : 0]; // MySQL log-ins three times, we check the second one
+		$file = substr_replace($file, "</td><td></td></tr>\n<tr><td>verifyTextPresent</td><td>PDO_", $offset + strlen($val), 0);
 		file_put_contents("pdo-$filename", $file);
 	}
 }