diff --git a/src/test/modules/snapshot_too_old/.gitignore b/src/test/modules/snapshot_too_old/.gitignore
new file mode 100644
index 0000000000..ef3609b7da
--- /dev/null
+++ b/src/test/modules/snapshot_too_old/.gitignore
@@ -0,0 +1 @@
+/isolation_output/