diff --git a/collects/2htdp/tests/.gitignore b/collects/2htdp/tests/.gitignore
index 32f04284da..cf259a30f5 100644
--- a/collects/2htdp/tests/.gitignore
+++ b/collects/2htdp/tests/.gitignore
@@ -1 +1,3 @@
+images0/
+images3/
 batch-io.txt