diff --git a/tests/helpers/xml_helper.hpp b/tests/helpers/xml_helper.hpp
index 3ceaf16c..08ea4643 100644
--- a/tests/helpers/xml_helper.hpp
+++ b/tests/helpers/xml_helper.hpp
@@ -305,7 +305,7 @@ public:
             }
 
             if (!compare_files(left_archive.read(left_member),
-                left_archive.read(left_member), left_content_type))
+                right_archive.read(left_member), left_content_type))
 			{
 				std::cout << left_member.string() << std::endl;
                 match = false;