test(agent): Fix TestAgent_UnixRemoteForwarding timeout (#7235)

agent/agent_test.go

@@ -733,12 +733,15 @@ func TestAgent_UnixRemoteForwarding(t *testing.T) {
 
 	// It's possible that the socket is created but the server is not ready to
 	// accept connections yet. We need to retry until we can connect.
+	//
+	// Note that we wait long here because if the tailnet connection has trouble
+	// connecting, it could take 5 seconds or more to reconnect.
 	var conn net.Conn
 	require.Eventually(t, func() bool {
 		var err error
 		conn, err = net.Dial("unix", remoteSocketPath)
 		return err == nil
-	}, testutil.WaitShort, testutil.IntervalFast)
+	}, testutil.WaitLong, testutil.IntervalFast)
 	defer conn.Close()
 	_, err = conn.Write([]byte("test"))
 	require.NoError(t, err)