diff --git a/benchmarks/Lexer.php b/benchmarks/Lexer.php
index d515a230..2d02defb 100644
--- a/benchmarks/Lexer.php
+++ b/benchmarks/Lexer.php
@@ -3,15 +3,22 @@
 // emulates inserting a dir called HTMLPurifier into your class dir
 set_include_path(get_include_path() . PATH_SEPARATOR . '../library/');
 
+require_once '../test-settings.php';
+
 require_once 'HTMLPurifier/ConfigSchema.php';
 require_once 'HTMLPurifier/Config.php';
-require_once 'HTMLPurifier/Lexer/DirectLex.php';
-require_once 'HTMLPurifier/Lexer/PEARSax3.php';
 
-$LEXERS = array(
-    'DirectLex' => new HTMLPurifier_Lexer_DirectLex(),
-    'PEARSax3'  => new HTMLPurifier_Lexer_PEARSax3()
-);
+$LEXERS = array();
+
+require_once 'HTMLPurifier/Lexer/DirectLex.php';
+$LEXERS['DirectLex'] = new HTMLPurifier_Lexer_DirectLex();
+
+if (!empty($GLOBALS['HTMLPurifierTest']['PEAR'])) {
+    require_once 'HTMLPurifier/Lexer/PEARSax3.php';
+    $LEXERS['PEARSax3'] = new HTMLPurifier_Lexer_PEARSax3();
+} else {
+    exit('PEAR required to perform benchmark.');
+}
 
 if (version_compare(PHP_VERSION, '5', '>=')) {
     require_once 'HTMLPurifier/Lexer/DOMLex.php';