diff --git a/app/src/main/java/de/jeanlucmakiola/clockula/alarm/ring/AlarmRingService.kt b/app/src/main/java/de/jeanlucmakiola/clockula/alarm/ring/AlarmRingService.kt
index f41714a..d37e5e6 100644
--- a/app/src/main/java/de/jeanlucmakiola/clockula/alarm/ring/AlarmRingService.kt
+++ b/app/src/main/java/de/jeanlucmakiola/clockula/alarm/ring/AlarmRingService.kt
@@ -121,7 +121,7 @@ class AlarmRingService : Service() {
         startForeground(
             RingNotifications.ringing(
                 context = this,
-                alarm = session.alarm,
+                session = session,
                 presentation = presentation(),
             ),
         )
diff --git a/app/src/main/java/de/jeanlucmakiola/clockula/alarm/ring/RingNotifications.kt b/app/src/main/java/de/jeanlucmakiola/clockula/alarm/ring/RingNotifications.kt
index 980a2b2..13301fa 100644
--- a/app/src/main/java/de/jeanlucmakiola/clockula/alarm/ring/RingNotifications.kt
+++ b/app/src/main/java/de/jeanlucmakiola/clockula/alarm/ring/RingNotifications.kt
@@ -11,7 +11,9 @@ import de.jeanlucmakiola.clockula.R
 import de.jeanlucmakiola.clockula.alarm.AlarmIntents
 import de.jeanlucmakiola.clockula.alarm.receiver.AlarmActionReceiver
 import de.jeanlucmakiola.clockula.domain.Alarm
+import de.jeanlucmakiola.clockula.domain.DismissChallenge
 import de.jeanlucmakiola.clockula.domain.alarm.RingPresentation
+import de.jeanlucmakiola.clockula.domain.alarm.RingSession
 import de.jeanlucmakiola.clockula.ui.ring.AlarmRingActivity
 import java.time.Instant as JavaInstant
 import java.time.LocalTime
@@ -95,12 +97,20 @@ object RingNotifications {
         return builder.build()
     }
 
-    /** The ringing notification, presented as [presentation] says the platform allows. */
+    /**
+     * The ringing notification, presented as [presentation] says the platform allows.
+     *
+     * Its actions never get round the ring screen's rules. Snooze appears only
+     * while snoozes are left, since a refused snooze dismisses; and an alarm
+     * with a dismiss challenge has its Dismiss open the ring screen, where the
+     * challenge is, rather than end the alarm from a heads-up or the lock screen.
+     */
     fun ringing(
         context: Context,
-        alarm: Alarm,
+        session: RingSession,
         presentation: RingPresentation,
     ): Notification {
+        val alarm = session.alarm
         val show = showPendingIntent(context)
         val builder = NotificationCompat.Builder(context, RING_CHANNEL_ID)
             .setSmallIcon(R.drawable.ic_notification)
@@ -112,16 +122,19 @@ object RingNotifications {
             .setOngoing(true)
             .setAutoCancel(false)
             .setContentIntent(show)
-            .addAction(
+        if (session.canSnooze) {
+            builder.addAction(
                 R.drawable.ic_notification,
                 context.getString(R.string.alarm_action_snooze),
                 actionPendingIntent(context, AlarmIntents.ACTION_SNOOZE, AlarmIntents.REQUEST_SNOOZE, alarm.id),
             )
-            .addAction(
-                R.drawable.ic_notification,
-                context.getString(R.string.alarm_action_dismiss),
-                actionPendingIntent(context, AlarmIntents.ACTION_DISMISS, AlarmIntents.REQUEST_DISMISS, alarm.id),
-            )
+        }
+        val dismiss = if (session.settings.dismissChallenge == DismissChallenge.NONE) {
+            actionPendingIntent(context, AlarmIntents.ACTION_DISMISS, AlarmIntents.REQUEST_DISMISS, alarm.id)
+        } else {
+            show
+        }
+        builder.addAction(R.drawable.ic_notification, context.getString(R.string.alarm_action_dismiss), dismiss)
 
         if (presentation.useFullScreenIntent) builder.setFullScreenIntent(show, true)
         return builder.build()