diff --git a/client_notification_test.go b/client_notification_test.go
index c39eba6..86d2c37 100644
--- a/client_notification_test.go
+++ b/client_notification_test.go
@@ -95,6 +95,16 @@ func TestCleanupConnectionAudioIsIdempotent(t *testing.T) {
 	b.cleanupConnectionAudio()
 }
 
+// Tone test mode intentionally does not create an OpenAL stream. Tree
+// controls must therefore keep local mute state without trying to update one.
+func TestUpdateUserGainAllowsToneTestWithoutStream(t *testing.T) {
+	(&Barnard{ToneTest: true}).updateUserGain(&gumble.User{})
+}
+
+func TestToneTestRejectsFilePlayback(t *testing.T) {
+	(&Barnard{ToneTest: true, Connected: true}).CommandPlayFile(nil, "https://example.invalid/audio")
+}
+
 func TestUserChangeNotification(t *testing.T) {
 	current := &gumble.Channel{ID: 1, Name: "Current"}
 	other := &gumble.Channel{ID: 2, Name: "Other"}
diff --git a/ui.go b/ui.go
index 8d715bd..f04dd66 100644
--- a/ui.go
+++ b/ui.go
@@ -240,11 +240,19 @@ func (b *Barnard) CommandPlayFile(ui *uiterm.Ui, cmd string) {
 		b.AddOutputLine("Not connected to server")
 		return
 	}
+	if b.ToneTest {
+		b.AddOutputLine("File playback is unavailable in tone test mode")
+		return
+	}
 
 	b.FileStreamMutex.Lock()
 	defer b.FileStreamMutex.Unlock()
+	if b.FileStream == nil {
+		b.AddOutputLine("File playback is unavailable while reconnecting")
+		return
+	}
 
-	if b.FileStream != nil && b.FileStream.IsPlaying() {
+	if b.FileStream.IsPlaying() {
 		b.AddOutputLine("Already playing a file. Use /stop first.")
 		return
 	}