diff --git a/test/phpunit/FunctionsLibTest.php b/test/phpunit/FunctionsLibTest.php
index d910a9f9d57..f0bb0b9ac2f 100644
--- a/test/phpunit/FunctionsLibTest.php
+++ b/test/phpunit/FunctionsLibTest.php
@@ -577,6 +577,9 @@ class FunctionsLibTest extends PHPUnit\Framework\TestCase
 		$input='This is a text with accent é';
 		$after=dol_textishtml($input);
 		$this->assertTrue($after, 'Test with a é');
+		$input='<i class="abc">xxx</i>';
+		$after=dol_textishtml($input);
+		$this->assertTrue($after, 'Test with i tag and class;');
 
 		// False
 		$input='xxx < br>';