diff --git a/plugins/inputs/radius/radius_test.go b/plugins/inputs/radius/radius_test.go
index fd5ba1619..8ccea751a 100644
--- a/plugins/inputs/radius/radius_test.go
+++ b/plugins/inputs/radius/radius_test.go
@@ -3,6 +3,7 @@ package radius
 import (
 	"context"
 	"errors"
+	"net"
 	"path/filepath"
 	"testing"
 	"time"
@@ -31,14 +32,22 @@ func TestRadiusLocal(t *testing.T) {
 		}
 	}
 
+	// Setup a connection to be able to get a random port
+	conn, err := net.ListenPacket("udp4", "127.0.0.1:0")
+	require.NoError(t, err)
+	defer conn.Close()
+	addr := conn.LocalAddr().String()
+	host, port, err := net.SplitHostPort(addr)
+	require.NoError(t, err)
+
 	server := radius.PacketServer{
 		Handler:      radius.HandlerFunc(handler),
 		SecretSource: radius.StaticSecretSource([]byte(`testsecret`)),
-		Addr:         ":1813",
+		Addr:         addr,
 	}
 
 	go func() {
-		if err := server.ListenAndServe(); err != nil {
+		if err := server.Serve(conn); err != nil {
 			if !errors.Is(err, radius.ErrServerShutdown) {
 				require.NoError(t, err, "local radius server failed")
 			}
@@ -46,25 +55,25 @@ func TestRadiusLocal(t *testing.T) {
 	}()
 
 	plugin := &Radius{
-		Servers:  []string{"localhost:1813"},
+		Servers:  []string{addr},
 		Username: config.NewSecret([]byte(`testusername`)),
 		Password: config.NewSecret([]byte(`testpassword`)),
 		Secret:   config.NewSecret([]byte(`testsecret`)),
 		Log:      testutil.Logger{},
 	}
-	var acc testutil.Accumulator
-
 	require.NoError(t, plugin.Init())
-	require.NoError(t, plugin.Gather(&acc))
-	require.Len(t, acc.Errors, 0)
+
+	var acc testutil.Accumulator
+	require.NoError(t, acc.GatherError(plugin.Gather))
+
 	if !acc.HasMeasurement("radius") {
 		t.Errorf("acc.HasMeasurement: expected radius")
 	}
 	require.Equal(t, true, acc.HasTag("radius", "source"))
 	require.Equal(t, true, acc.HasTag("radius", "source_port"))
 	require.Equal(t, true, acc.HasTag("radius", "response_code"))
-	require.Equal(t, "localhost", acc.TagValue("radius", "source"))
-	require.Equal(t, "1813", acc.TagValue("radius", "source_port"))
+	require.Equal(t, host, acc.TagValue("radius", "source"))
+	require.Equal(t, port, acc.TagValue("radius", "source_port"))
 	require.Equal(t, radius.CodeAccessAccept.String(), acc.TagValue("radius", "response_code"))
 	require.Equal(t, true, acc.HasInt64Field("radius", "responsetime_ms"))