diff --git a/tests/app-batch-fetch-profiles.test.mjs b/tests/app-batch-fetch-profiles.test.mjs
index df90a4bc..45148645 100644
--- a/tests/app-batch-fetch-profiles.test.mjs
+++ b/tests/app-batch-fetch-profiles.test.mjs
@@ -49,6 +49,9 @@ test("batchFetchProfiles handles fast and failing relays", async () => {
   const originalRelays = Array.isArray(nostrClient.relays)
     ? [...nostrClient.relays]
     : [];
+  const originalReadRelays = Array.isArray(nostrClient.readRelays)
+    ? [...nostrClient.readRelays]
+    : nostrClient.readRelays;
   const originalWriteRelays = Array.isArray(nostrClient.writeRelays)
     ? [...nostrClient.writeRelays]
     : nostrClient.writeRelays;
@@ -57,6 +60,7 @@ test("batchFetchProfiles handles fast and failing relays", async () => {
   const poolListCalls = [];
 
   nostrClient.relays = [FAST_RELAY, FAIL_RELAY];
+  nostrClient.readRelays = [FAST_RELAY, FAIL_RELAY];
   nostrClient.writeRelays = [FAST_RELAY, FAIL_RELAY];
   nostrClient.pool = {
     list: (relays, filters) => {
@@ -92,6 +96,7 @@ test("batchFetchProfiles handles fast and failing relays", async () => {
     });
   } finally {
     nostrClient.relays = originalRelays;
+    nostrClient.readRelays = originalReadRelays;
     nostrClient.writeRelays = originalWriteRelays;
     nostrClient.pool = originalPool;
   }
diff --git a/tests/utils/lruCache.test.mjs b/tests/utils/lruCache.test.mjs
new file mode 100644
index 00000000..199c50fc
--- /dev/null
+++ b/tests/utils/lruCache.test.mjs
@@ -0,0 +1,86 @@
+import { describe, it, beforeEach } from "node:test";
+import assert from "node:assert/strict";
+import { LRUCache } from "../../js/utils/lruCache.js";
+
+describe("LRUCache", () => {
+  let cache;
+
+  beforeEach(() => {
+    cache = new LRUCache({ maxSize: 3 });
+  });
+
+  it("should initialize with default options", () => {
+    const defaultCache = new LRUCache();
+    assert.equal(defaultCache.maxSize, 100);
+    assert.equal(defaultCache.size(), 0);
+  });
+
+  it("should store and retrieve values", () => {
+    cache.set("a", 1);
+    assert.equal(cache.get("a"), 1);
+    assert.equal(cache.has("a"), true);
+    assert.equal(cache.size(), 1);
+  });
+
+  it("should evict oldest item when limit is reached", () => {
+    cache.set("a", 1);
+    cache.set("b", 2);
+    cache.set("c", 3);
+    assert.equal(cache.size(), 3);
+
+    cache.set("d", 4); // Should evict 'a'
+    assert.equal(cache.size(), 3);
+    assert.equal(cache.has("a"), false);
+    assert.equal(cache.get("b"), 2);
+    assert.equal(cache.get("d"), 4);
+  });
+
+  it("should refresh recency on access", () => {
+    cache.set("a", 1);
+    cache.set("b", 2);
+    cache.set("c", 3);
+
+    // Access 'a', making it newest
+    cache.get("a");
+
+    cache.set("d", 4); // Should evict 'b' (oldest is now 'b')
+
+    assert.equal(cache.has("b"), false);
+    assert.equal(cache.has("a"), true);
+    assert.equal(cache.has("c"), true);
+    assert.equal(cache.has("d"), true);
+  });
+
+  it("should update value and refresh recency on set", () => {
+    cache.set("a", 1);
+    cache.set("b", 2);
+    cache.set("c", 3);
+
+    // Update 'a'
+    cache.set("a", 10);
+
+    cache.set("d", 4); // Should evict 'b'
+
+    assert.equal(cache.get("a"), 10);
+    assert.equal(cache.has("b"), false);
+  });
+
+  it("should track stats", () => {
+    cache.set("a", 1);
+    cache.get("a"); // Hit
+    cache.get("b"); // Miss
+
+    const stats = cache.getStats();
+    assert.equal(stats.hits, 1);
+    assert.equal(stats.misses, 1);
+    assert.equal(stats.size, 1);
+    assert.equal(stats.maxSize, 3);
+  });
+
+  it("should clear cache", () => {
+    cache.set("a", 1);
+    cache.clear();
+    assert.equal(cache.size(), 0);
+    assert.equal(cache.getStats().hits, 0);
+  });
+});