diff --git a/tests/MailFunc.php b/tests/MailFunc.php
index 80b5bbb46..f4fc3ed37 100644
--- a/tests/MailFunc.php
+++ b/tests/MailFunc.php
@@ -118,7 +118,7 @@ class MailFunc extends PHPUnit_Framework_TestCase
         $part = $this->get_html_part('src/invalidchars.html');
         $washed = rcmail_print_body($part->body, $part);
 
-        $this->assertRegExp('/<p>символ<\/p>/', $washed, "Remove non-unicode characters from HTML message body");
+        $this->assertRegExp('/<p>(символ|симол)<\/p>/', $washed, "Remove non-unicode characters from HTML message body");
     }
 
     /**