diff --git a/.gitignore b/.gitignore
index 0093062..c56e7f0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,6 +2,11 @@
 *.o
 sudoku
 
+# Test data
+sudoku.csv
+puzzles
+results
+
 # Clangd files
 .cache/*
 compile_commands.json