diff --git a/lib/openscap_parser/test_result_file.rb b/lib/openscap_parser/test_result_file.rb
index e01b2b9..211a44b 100644
--- a/lib/openscap_parser/test_result_file.rb
+++ b/lib/openscap_parser/test_result_file.rb
@@ -1,4 +1,7 @@
 # frozen_string_literal: true
+require 'openscap_parser/xml_file'
+require 'openscap_parser/benchmarks'
+require 'openscap_parser/test_results'
 
 module OpenscapParser
   # A class to represent an XmlFile which contains a <TestResult /> Xccdf type