diff --git a/net/connUDP_internal_test.go b/net/connUDP_internal_test.go
index 5e1cf901..53003c14 100644
--- a/net/connUDP_internal_test.go
+++ b/net/connUDP_internal_test.go
@@ -284,21 +284,21 @@ func TestControlMessageString(t *testing.T) {
 func getIfaceAddr(t *testing.T, iface net.Interface, ipv4 bool) net.IP {
 	addrs, err := iface.Addrs()
 	require.NoError(t, err)
+	var ipOut net.IP
 	for _, addr := range addrs {
 		ip, _, err := net.ParseCIDR(addr.String())
 		require.NoError(t, err)
 		if !ip.IsPrivate() {
 			continue
 		}
-		if ipv4 {
-			if ip.To4() != nil {
-				return ip
-			}
+		if ipv4 && ip.To4() == nil {
 			continue
 		}
-		return ip
+		ipOut = ip
+		break
 	}
-	return nil
+	require.NotEmpty(t, ipOut)
+	return ipOut
 }
 
 func TestUDPConnWriteToAddr(t *testing.T) {