diff --git a/board/src/position/flags.rs b/board/src/position/flags.rs
index 2aa389d..7efc41d 100644
--- a/board/src/position/flags.rs
+++ b/board/src/position/flags.rs
@@ -69,5 +69,11 @@ mod tests {
         assert!(!flags.player_has_right_to_castle(Color::White, BoardSide::Queen));
         assert!(flags.player_has_right_to_castle(Color::Black, BoardSide::King));
         assert!(flags.player_has_right_to_castle(Color::Black, BoardSide::Queen));
+
+        flags.set_player_has_right_to_castle_flag(Color::White, BoardSide::Queen);
+        assert!(flags.player_has_right_to_castle(Color::White, BoardSide::King));
+        assert!(flags.player_has_right_to_castle(Color::White, BoardSide::Queen));
+        assert!(flags.player_has_right_to_castle(Color::Black, BoardSide::King));
+        assert!(flags.player_has_right_to_castle(Color::Black, BoardSide::Queen));
     }
 }