diff --git a/p2p/dnsdisc/client_test.go b/p2p/dnsdisc/client_test.go
index 77bfd8c131..f85afaf352 100644
--- a/p2p/dnsdisc/client_test.go
+++ b/p2p/dnsdisc/client_test.go
@@ -448,9 +448,7 @@ func newMapResolver(maps ...map[string]string) mapResolver {
 }
 
 func (mr mapResolver) clear() {
-	for k := range mr {
-		delete(mr, k)
-	}
+	clear(mr)
 }
 
 func (mr mapResolver) add(m map[string]string) {