diff --git a/.gitignore b/.gitignore
index d58be11..5dd7251 100644
--- a/.gitignore
+++ b/.gitignore
@@ -30,4 +30,6 @@ Thumbs.db
 *.test
 *.out
 
-/test_data/tmp
+# Test data (generated by tests)
+test_data/tmp
+test_data/test1