diff --git a/test/gd73_test.cc b/test/gd73_test.cc
new file mode 100644
index 00000000..fd618dde
--- /dev/null
+++ b/test/gd73_test.cc
@@ -0,0 +1,154 @@
+#include "gd73_test.hh"
+#include "config.hh"
+#include "gd73.hh"
+#include "gd73_codeplug.hh"
+#include "errorstack.hh"
+#include <iostream>
+#include <QTest>
+
+GD73Test::GD73Test(QObject *parent)
+  : UnitTestBase(parent)
+{
+  // pass...
+}
+
+void
+GD73Test::testBasicConfigEncoding() {
+  ErrorStack err;
+  GD73Codeplug codeplug;
+  if (! codeplug.encode(&_basicConfig, Codeplug::Flags(), err)) {
+    QFAIL(QString("Cannot encode codeplug for Radioddity GD77: %1")
+          .arg(err.format()).toStdString().c_str());
+  }
+}
+
+void
+GD73Test::testBasicConfigDecoding() {
+  ErrorStack err;
+  GD73Codeplug codeplug;
+  if (! codeplug.encode(&_basicConfig, Codeplug::Flags(), err)) {
+    QFAIL(QString("Cannot encode codeplug for Radioddity GD77: %1")
+          .arg(err.format()).toStdString().c_str());
+  }
+
+  Config config;
+  if (! codeplug.decode(&config, err)) {
+    QFAIL(QString("Cannot decode codeplug for Radioddity GD77: %1")
+          .arg(err.format()).toStdString().c_str());
+  }
+}
+
+void
+GD73Test::testChannelFrequency() {
+  ErrorStack err;
+  GD73Codeplug codeplug;
+  if (! codeplug.encode(&_channelFrequencyConfig, Codeplug::Flags(), err)) {
+    QFAIL(QString("Cannot encode codeplug for Radioddity GD77: {}")
+          .arg(err.format()).toStdString().c_str());
+  }
+
+  Config config;
+  if (! codeplug.decode(&config, err)) {
+    QFAIL(QString("Cannot decode codeplug for Radioddity GD77: {}")
+          .arg(err.format()).toStdString().c_str());
+  }
+
+  QCOMPARE(config.channelList()->channel(0)->rxFrequency(),
+           Frequency::fromHz(123456780ULL));
+  QCOMPARE(config.channelList()->channel(0)->txFrequency(),
+           Frequency::fromHz(999999990ULL));
+}
+
+
+void
+GD73Test::testFMSignaling() {
+
+  Config config;
+  config.radioIDs()->add(new DMRRadioID("ID", 1234567));
+
+  {
+    FMChannel *ch = new FMChannel();
+    ch->setName("Channel 1");
+    ch->setRXFrequency(Frequency::fromMHz(144.0));
+    ch->setTXFrequency(Frequency::fromMHz(144.6));
+    ch->setRXTone(Signaling::CTCSS_67_0Hz);
+    ch->setTXTone(Signaling::SIGNALING_NONE);
+    config.channelList()->add(ch);
+  }
+
+  {
+    FMChannel *ch = new FMChannel();
+    ch->setName("Channel 2");
+    ch->setRXFrequency(Frequency::fromMHz(144.0));
+    ch->setTXFrequency(Frequency::fromMHz(144.6));
+    ch->setRXTone(Signaling::SIGNALING_NONE);
+    ch->setTXTone(Signaling::CTCSS_67_0Hz);
+    config.channelList()->add(ch);
+  }
+
+  {
+    FMChannel *ch = new FMChannel();
+    ch->setName("Channel 3");
+    ch->setRXFrequency(Frequency::fromMHz(144.0));
+    ch->setTXFrequency(Frequency::fromMHz(144.6));
+    ch->setRXTone(Signaling::DCS_023N);
+    ch->setTXTone(Signaling::SIGNALING_NONE);
+    config.channelList()->add(ch);
+  }
+
+  {
+    FMChannel *ch = new FMChannel();
+    ch->setName("Channel 4");
+    ch->setRXFrequency(Frequency::fromMHz(144.0));
+    ch->setTXFrequency(Frequency::fromMHz(144.6));
+    ch->setRXTone(Signaling::SIGNALING_NONE);
+    ch->setTXTone(Signaling::DCS_023N);
+    config.channelList()->add(ch);
+  }
+
+  {
+    FMChannel *ch = new FMChannel();
+    ch->setName("Channel 5");
+    ch->setRXFrequency(Frequency::fromMHz(144.0));
+    ch->setTXFrequency(Frequency::fromMHz(144.6));
+    ch->setRXTone(Signaling::DCS_023I);
+    ch->setTXTone(Signaling::SIGNALING_NONE);
+    config.channelList()->add(ch);
+  }
+
+  {
+    FMChannel *ch = new FMChannel();
+    ch->setName("Channel 6");
+    ch->setRXFrequency(Frequency::fromMHz(144.0));
+    ch->setTXFrequency(Frequency::fromMHz(144.6));
+    ch->setRXTone(Signaling::SIGNALING_NONE);
+    ch->setTXTone(Signaling::DCS_023I);
+    config.channelList()->add(ch);
+  }
+
+  ErrorStack err;
+  GD73Codeplug codeplug;
+  if (! codeplug.encode(&config, Codeplug::Flags(), err)) {
+    QFAIL(QString("Cannot encode codeplug for Radioddity GD73: {}")
+          .arg(err.format()).toStdString().c_str());
+  }
+
+  Config compare;
+  if (! codeplug.decode(&compare, err)) {
+    QFAIL(QString("Cannot decode codeplug for Radioddity GD73: {}")
+          .arg(err.format()).toStdString().c_str());
+  }
+
+  QCOMPARE(compare.channelList()->count(), 6);
+  for (int i=0; i<compare.channelList()->count(); i++) {
+    QVERIFY(compare.channelList()->channel(i)->is<FMChannel>());
+    QCOMPARE((unsigned int)compare.channelList()->channel(i)->as<FMChannel>()->rxTone(),
+             (unsigned int)config.channelList()->channel(i)->as<FMChannel>()->rxTone());
+    QCOMPARE((unsigned int)compare.channelList()->channel(i)->as<FMChannel>()->txTone(),
+             (unsigned int)config.channelList()->channel(i)->as<FMChannel>()->txTone());
+  }
+}
+
+
+QTEST_GUILESS_MAIN(GD73Test)
+
diff --git a/test/gd73_test.hh b/test/gd73_test.hh
new file mode 100644
index 00000000..89ad07c5
--- /dev/null
+++ b/test/gd73_test.hh
@@ -0,0 +1,22 @@
+#ifndef GD73TEST_HH
+#define GD73TEST_HH
+
+
+#include "libdmrconfigtest.hh"
+
+class GD73Test : public UnitTestBase
+{
+  Q_OBJECT
+
+public:
+  explicit GD73Test(QObject *parent = nullptr);
+
+private slots:
+  void testBasicConfigEncoding();
+  void testBasicConfigDecoding();
+  void testChannelFrequency();
+
+  void testFMSignaling();
+};
+
+#endif // GD73TEST_HH