diff --git a/include/internal/catch_test_case_registry_impl.hpp b/include/internal/catch_test_case_registry_impl.hpp
index 43b4ee80..9588e0ad 100644
--- a/include/internal/catch_test_case_registry_impl.hpp
+++ b/include/internal/catch_test_case_registry_impl.hpp
@@ -104,8 +104,10 @@ namespace Catch {
             return m_functions;
         }
         virtual std::vector<TestCase> const& getAllTestsSorted( IConfig const& config ) const {
-            if( m_sortedFunctions.empty() )
+            if( m_sortedFunctions.empty() ) {
                 enforceNoDuplicateTestCases( m_functions );
+                m_currentSortOrder = config.runOrder();
+            }
 
             if(  m_currentSortOrder != config.runOrder() || m_sortedFunctions.empty() ) {
                 m_sortedFunctions = sortTests( config, m_functions );