diff --git a/tools/chatgui/tests/test_stream_publish.cpp b/tools/chatgui/tests/test_stream_publish.cpp
index e7c31254..58ace38b 100644
--- a/tools/chatgui/tests/test_stream_publish.cpp
+++ b/tools/chatgui/tests/test_stream_publish.cpp
@@ -492,6 +492,15 @@ private slots:
         auto* audio = menu(controls, "streamAudioSource");
         choose(audio, QVariant()); QVERIFY(!chosen(audio).isValid()); QVERIFY(!sound->isChecked());
         choose(audio, QString()); QVERIFY(chosen(audio).isValid()); QVERIFY(sound->isChecked());
+        QVERIFY(sound->isEnabled()); QSignalSpy errors(&engine, &StreamPublishEngine::errorOccurred);
+        QSignalSpy settings(&controls, &StreamPublishWindow::settingsChanged);
+        QTest::mouseClick(sound, Qt::LeftButton); QVERIFY(!sound->isChecked()); QVERIFY(!engine.active()); QVERIFY(errors.isEmpty());
+        QVERIFY(!settings.isEmpty()); const QString mutedSettings = settings.last().front().toString();
+        QVERIFY(QJsonDocument::fromJson(mutedSettings.toUtf8()).object().value("muted").toBool());
+        choose(menu(controls, "streamVideoBitrate"), 0); QVERIFY(!sound->isChecked());
+        StreamPublishEngine reopenedEngine; StreamPublishWindow reopened(&reopenedEngine, group, nullptr, mutedSettings);
+        QVERIFY(!reopened.findChild<QToolButton*>("streamSound")->isChecked());
+        QTest::mouseClick(sound, Qt::LeftButton); QVERIFY(sound->isChecked()); QVERIFY(errors.isEmpty());
         auto* resolution = menu(controls, "streamVideoResolution"); auto* fps = menu(controls, "streamVideoFps");
         for (auto* submenu : {resolution, fps, qp, audio}) {
             QVERIFY(!submenu->actions().first()->text().isEmpty()); QVERIFY(!submenu->actions().first()->isCheckable());
@@ -514,6 +523,30 @@ private slots:
             }
         }
     }
+    void initiallyMutedStream() {
+#if defined(HAVE_STREAM_CAPTURE) && defined(TEST_NULL_AUDIO)
+        if (!qEnvironmentVariableIsSet("UTUN_TEST_SCREEN_CAPTURE")) QSKIP("Run under isolated Xvfb");
+        QVERIFY(SoundManager::instance()->init());
+        StreamPublishEngine engine; StreamPublishConfig config; config.startMuted = true;
+        config.video.width = 320; config.video.height = 180; config.video.fps = 15;
+        for (const auto& source : engine.sources()) if (source.kind == StreamVideoSource::Screen && source.screen) {
+            config.source = source; break;
+        }
+        QVERIFY(config.source.screen);
+        connect(&engine, &StreamPublishEngine::softwareEncodingRequested, &engine,
+            [&engine](uint64_t generation) { engine.answerSoftwareEncoding(generation, true); });
+        QVERIFY(engine.start(group, config)); QVERIFY(engine.muted());
+        stream_member_state member{};
+        QTRY_VERIFY_WITH_TIMEOUT(stream_member_load(inst, group, inst->node_id, &member, nullptr) == STREAM_OK && member.published, 5000);
+        QVERIFY(!member.audio_enabled); uint64_t epoch = member.source.source_epoch;
+        engine.setMuted(false); QVERIFY(!engine.muted());
+        QTRY_VERIFY_WITH_TIMEOUT(stream_member_load(inst, group, inst->node_id, &member, nullptr) == STREAM_OK && member.audio_enabled, 2000);
+        QCOMPARE(member.source.source_epoch, epoch);
+        engine.stop(); QTRY_VERIFY_WITH_TIMEOUT(!engine.active(), 4000);
+#else
+        QSKIP("Capture and null audio are required");
+#endif
+    }
     void nativeScreenCapture_data() {
         QTest::addColumn<int>("codec");
         QTest::newRow("h264") << int(STREAM_MEDIA_H264);