diff --git a/internal/resolver/dns/dns_resolver_test.go b/internal/resolver/dns/dns_resolver_test.go
index a1119b4205f4..f0d4dbadc154 100644
--- a/internal/resolver/dns/dns_resolver_test.go
+++ b/internal/resolver/dns/dns_resolver_test.go
@@ -1051,11 +1051,6 @@ func (s) TestCustomAuthority(t *testing.T) {
 			authority:     "4.3.2.1",
 			wantAuthority: "4.3.2.1:53",
 		},
-		{
-			name:          "ipv6 authority with no port",
-			authority:     "::1",
-			wantAuthority: "[::1]:53",
-		},
 		{
 			name:          "ipv6 authority with brackets and no port",
 			authority:     "[::1]",