diff --git a/desktop/src/features/sidebar/lib/channelMutesStorage.test.mjs b/desktop/src/features/sidebar/lib/channelMutesStorage.test.mjs
index a9734cb33e..2efbb2e64c 100644
--- a/desktop/src/features/sidebar/lib/channelMutesStorage.test.mjs
+++ b/desktop/src/features/sidebar/lib/channelMutesStorage.test.mjs
@@ -3,6 +3,7 @@ import {
   DEFAULT_STORE,
   MAX_CHANNEL_MUTE_ENTRIES,
   mergeStores,
+  mutedChannelIdsFromStore,
   parseMutePayload,
   readChannelMutesStore,
   storageKey,
@@ -23,6 +24,7 @@ runMergeLaneStorageSuite({
   falseLabel: "unmute",
   boundStore: boundMuteStore,
   mergeStores,
+  idsFromStore: mutedChannelIdsFromStore,
   readStore: readChannelMutesStore,
   writeStore: writeChannelMutesStore,
   storageKey,
diff --git a/desktop/src/features/sidebar/lib/channelStarsStorage.test.mjs b/desktop/src/features/sidebar/lib/channelStarsStorage.test.mjs
index c86668807e..0757704d82 100644
--- a/desktop/src/features/sidebar/lib/channelStarsStorage.test.mjs
+++ b/desktop/src/features/sidebar/lib/channelStarsStorage.test.mjs
@@ -5,6 +5,7 @@ import {
   mergeStores,
   parseStarPayload,
   readChannelStarsStore,
+  starredChannelIdsFromStore,
   storageKey,
   writeChannelStarsStore,
 } from "./channelStarsStorage.ts";
@@ -23,6 +24,7 @@ runMergeLaneStorageSuite({
   falseLabel: "unstar",
   boundStore: boundStarStore,
   mergeStores,
+  idsFromStore: starredChannelIdsFromStore,
   readStore: readChannelStarsStore,
   writeStore: writeChannelStarsStore,
   storageKey,
diff --git a/desktop/src/features/sidebar/lib/mergeLaneStorage.shared.test.mjs b/desktop/src/features/sidebar/lib/mergeLaneStorage.shared.test.mjs
index 81846dd412..70c9c063cc 100644
--- a/desktop/src/features/sidebar/lib/mergeLaneStorage.shared.test.mjs
+++ b/desktop/src/features/sidebar/lib/mergeLaneStorage.shared.test.mjs
@@ -15,7 +15,6 @@
 //     falseLabel:      "unstar",
 //     boundStore:      boundStarStore,
 //     mergeStores,
-//     isSubsumedBy:    isStarsStoreSubsumedBy,
 //     idsFromStore:    starredChannelIdsFromStore,
 //     readStore:       readChannelStarsStore,
 //     writeStore:      writeChannelStarsStore,
@@ -53,6 +52,8 @@ if (typeof globalThis.window === "undefined") {
  * @param {string}   cfg.falseLabel       - Action name when value=false (e.g. "unstar").
  * @param {Function} cfg.boundStore       - bound{Star|Mute}Store(store, preservedKey?).
  * @param {Function} cfg.mergeStores      - mergeStores(a, b, preservedKey?).
+ * @param {Function} cfg.isSubsumedBy     - is{Stars|Mutes}StoreSubsumedBy(a, b).
+ * @param {Function} cfg.idsFromStore     - {starred|muted}ChannelIdsFromStore(store).
  * @param {Function} cfg.readStore        - readChannel{Stars|Mutes}Store(pubkey, relay?).
  * @param {Function} cfg.writeStore       - writeChannel{Stars|Mutes}Store(pubkey, store, relay?).
  * @param {Function} cfg.storageKey       - storageKey(pubkey, relay?).
@@ -69,6 +70,7 @@ export function runMergeLaneStorageSuite({
   falseLabel,
   boundStore,
   mergeStores,
+  idsFromStore,
   readStore,
   writeStore,
   storageKey,
@@ -490,6 +492,31 @@ export function runMergeLaneStorageSuite({
     );
   });
 
+  // ── idsFromStore ─────────────────────────────────────────────────────────
+
+  test(`${label}: idsFromStore: returns set of IDs where ${entryValueField}=true`, () => {
+    const result = idsFromStore({
+      version: 1,
+      channels: {
+        a: E(true, 100, 0),
+        b: E(true, 200, 0),
+        c: E(false, 300, 0),
+      },
+    });
+    assert.deepEqual([...result].sort(), ["a", "b"]);
+  });
+
+  test(`${label}: idsFromStore: all-false / empty returns empty set`, () => {
+    assert.equal(
+      idsFromStore({
+        version: 1,
+        channels: { x: E(false, 1, 0) },
+      }).size,
+      0,
+    );
+    assert.equal(idsFromStore({ version: 1, channels: {} }).size, 0);
+  });
+
   // ── storageKey + readStore/writeStore ─────────────────────────────────────
 
   test(`${label}: storageKey: with relayUrl includes normalized+encoded relay in key`, () => {