diff --git a/bin/tests/system/rndc/clean.sh b/bin/tests/system/rndc/clean.sh
index d67edc84a0..39ba46cc30 100644
--- a/bin/tests/system/rndc/clean.sh
+++ b/bin/tests/system/rndc/clean.sh
@@ -24,4 +24,4 @@ rm -f ns4/*.conf
 rm -f rndc.status
 rm -f rndc.output
 rm -f ns*/named.lock
-rm -f ns4/_default.nta
+rm -f ns4/*.nta