diff --git a/tests/UnitTests/TemplateSource/TagTests/Php/CompilePhpTest.php b/tests/UnitTests/TemplateSource/TagTests/Php/CompilePhpTest.php
index 33586b7b..1463b5fd 100644
--- a/tests/UnitTests/TemplateSource/TagTests/Php/CompilePhpTest.php
+++ b/tests/UnitTests/TemplateSource/TagTests/Php/CompilePhpTest.php
@@ -93,6 +93,14 @@ class CompilePhpTest extends PHPUnit_Smarty
         $content = $this->smartyBC->fetch("string:aa {php no cache} echo 'hallo'; {/php} ae");
     }
 
+    /**
+     * Test regression that plugin names starting with 'php' do work
+     */
+    public function testPHPfooPlugin()
+    {
+        $this->smarty->addPluginsDir("./PHPunitplugins/");
+        $this->assertEquals('phptest okay', $this->smarty->fetch('string:{phptest}'));
+    }
 
     public function data()
     {
diff --git a/tests/UnitTests/TemplateSource/TagTests/Php/PHPunitplugins/function.phptest.php b/tests/UnitTests/TemplateSource/TagTests/Php/PHPunitplugins/function.phptest.php
new file mode 100644
index 00000000..922609e4
--- /dev/null
+++ b/tests/UnitTests/TemplateSource/TagTests/Php/PHPunitplugins/function.phptest.php
@@ -0,0 +1,5 @@
+<?php
+function smarty_function_phptest($params,$smarty)
+{
+    return 'phptest okay';
+}