diff --git a/data/module/Net/URL.php b/data/module/Net/URL.php
index dc03705189..005890b462 100644
--- a/data/module/Net/URL.php
+++ b/data/module/Net/URL.php
@@ -106,16 +106,6 @@ class Net_URL
     */
     var $useBrackets;
 
-    /**
-    * PHP4 Constructor
-    *
-    * @see __construct()
-    */
-    function Net_URL($url = null, $useBrackets = true)
-    {
-        $this->__construct($url, $useBrackets);
-    }
-
     /**
     * PHP5 Constructor
     *
@@ -127,7 +117,7 @@ function Net_URL($url = null, $useBrackets = true)
     *                            multiple querystrings with the same name
     *                            exist
     */
-    function __construct($url = null, $useBrackets = true)
+    public function __construct($url = null, $useBrackets = true)
     {
         $this->url = $url;
         $this->useBrackets = $useBrackets;
diff --git a/tests/require.php b/tests/require.php
index aa427b1e4a..73154f19eb 100644
--- a/tests/require.php
+++ b/tests/require.php
@@ -7,8 +7,10 @@
     exit(1);
 }
 
-class_exists('FPDI'); // XXX PHPStan が FPDI を見つけてくれないのでロードしておく
-class_exists('Smarty'); // XXX PHPStan が Smarty を見つけてくれないのでロードしておく
+// XXX PHPStan が見つけてくれないライブラリをロードしておく
+class_exists('FPDI');
+class_exists('Smarty');
+class_exists('MDB2');
 
 if (!class_exists('PHPUnit_Framework_TestCase')) {
     class_alias('PHPUnit\Framework\TestCase', 'PHPUnit_Framework_TestCase');