diff --git a/tests/dns/.gitignore b/tests/dns/.gitignore
index ed143a8bc6..faa0a18eb0 100644
--- a/tests/dns/.gitignore
+++ b/tests/dns/.gitignore
@@ -1,3 +1,4 @@
 /zone.data
 /testdata/dnstap/dnstap.file
 /testdata/master/master18.data
+/badcache.out