diff --git a/tests/PHPUnit_Smarty.php b/tests/PHPUnit_Smarty.php
index aa9bee8a..9c4b9275 100644
--- a/tests/PHPUnit_Smarty.php
+++ b/tests/PHPUnit_Smarty.php
@@ -379,7 +379,8 @@ KEY `expire` (`expire`)
             case 'mysql':
                 return sha1($type . ':' . $name);
             case 'string':
-                return sha1($name);
+                $this->smarty->getTemplateDir();
+                return sha1($name . $this->smarty->_joined_template_dir);
             default:
                 throw new Exception("Unhandled source resource type '{$type}'");
         }
@@ -413,7 +414,8 @@ KEY `expire` (`expire`)
             case 'mysql':
                 return sha1($type . ':' . $name);
             case 'string':
-                return sha1($name);
+                $this->smarty->getTemplateDir();
+                return sha1($name . $this->smarty->_joined_template_dir);
             default:
                 throw new Exception("Unhandled source resource type '{$type}'");
         }
diff --git a/tests/UnitTests/ResourceTests/String/StringResourceTest.php b/tests/UnitTests/ResourceTests/String/StringResourceTest.php
index 28bf13b1..5baee6f9 100644
--- a/tests/UnitTests/ResourceTests/String/StringResourceTest.php
+++ b/tests/UnitTests/ResourceTests/String/StringResourceTest.php
@@ -56,7 +56,7 @@ class StringResourceTest extends PHPUnit_Smarty
     public function testGetTemplateFilepath()
     {
         $tpl = $this->smarty->createTemplate('string:hello world');
-        $this->assertEquals('2aae6c35c94fcfb415dbe95f408b9ce91ee846ed', $tpl->source->filepath);
+        $this->assertEquals('f2611951e67556edb47cb258ac23fede8ba704bd', $tpl->source->filepath);
     }
 
     /**