diff --git a/src/room/__snapshots__/InCallView.test.tsx.snap b/src/room/__snapshots__/InCallView.test.tsx.snap
index 955c061e..99f19443 100644
--- a/src/room/__snapshots__/InCallView.test.tsx.snap
+++ b/src/room/__snapshots__/InCallView.test.tsx.snap
@@ -17,7 +17,7 @@ exports[`InCallView > rendering > renders 1`] = `
         >
           <span
             aria-label=""
-            class="_avatar_7h2br_8 roomAvatar _avatar-imageless_7h2br_55"
+            class="_avatar_va14e_8 roomAvatar _avatar-imageless_va14e_55"
             data-color="1"
             data-type="round"
             role="img"
diff --git a/src/settings/__snapshots__/DeveloperSettingsTab.test.tsx.snap b/src/settings/__snapshots__/DeveloperSettingsTab.test.tsx.snap
index d8edcfd5..af38685a 100644
--- a/src/settings/__snapshots__/DeveloperSettingsTab.test.tsx.snap
+++ b/src/settings/__snapshots__/DeveloperSettingsTab.test.tsx.snap
@@ -204,7 +204,7 @@ exports[`DeveloperSettingsTab > renders and matches snapshot 1`] = `
       >
         <input
           aria-describedby="radix-_r_7_"
-          class="_control_sqdq4_10"
+          class="_control_d83jn_10"
           id="radix-_r_6_"
           name="input"
           title=""
diff --git a/src/state/CallViewModel/localMember/LocalMember.ts b/src/state/CallViewModel/localMember/LocalMember.ts
index 188dc543..5527553e 100644
--- a/src/state/CallViewModel/localMember/LocalMember.ts
+++ b/src/state/CallViewModel/localMember/LocalMember.ts
@@ -794,7 +794,6 @@ export function enterRTCSession(
       makeKeyDelay: matrixRtcSessionConfig?.wait_for_key_rotation_ms,
       membershipEventExpiryMs:
         matrixRtcSessionConfig?.membership_event_expiry_ms,
-      useExperimentalToDeviceTransport: true,
       unstableSendStickyEvents: matrixRTCMode === MatrixRTCMode.Matrix_2_0,
     },
   );
diff --git a/src/useAudioContext.test.tsx b/src/useAudioContext.test.tsx
index 97bfff5c..07616ddd 100644
--- a/src/useAudioContext.test.tsx
+++ b/src/useAudioContext.test.tsx
@@ -74,7 +74,26 @@ const panNode = vi.mocked(
  * It can also be used to mock the `AudioContext` constructor in tests:
  * `vi.stubGlobal("AudioContext", () => testAudioContext);`
  */
-export const testAudioContext = {
+export const testAudioContext: Partial<AudioContext> & {
+  gain: ReturnType<
+    typeof vi.mocked<{
+      connect: (node: AudioNode) => AudioNode;
+      gain: { setValueAtTime: ReturnType<typeof vi.fn>; value: number };
+    }>
+  >;
+  pan: ReturnType<
+    typeof vi.mocked<{
+      connect: (node: AudioNode) => AudioNode;
+      pan: { setValueAtTime: ReturnType<typeof vi.fn>; value: number };
+    }>
+  >;
+  setSinkId: ReturnType<typeof vi.fn>;
+  decodeAudioData: ReturnType<typeof vi.fn>;
+  createBufferSource: ReturnType<typeof vi.fn>;
+  createGain: ReturnType<typeof vi.fn>;
+  createStereoPanner: ReturnType<typeof vi.fn>;
+  close: ReturnType<typeof vi.fn>;
+} = {
   gain: gainNode,
   pan: panNode,
   setSinkId: vi.fn().mockResolvedValue(undefined),
diff --git a/src/utils/test.ts b/src/utils/test.ts
index af372bfb..695dd046 100644
--- a/src/utils/test.ts
+++ b/src/utils/test.ts
@@ -15,6 +15,7 @@ import {
   vitest,
 } from "vitest";
 import {
+  EventType,
   MatrixEvent,
   type Room as MatrixRoom,
   type Room,
@@ -255,6 +256,7 @@ export function mockRtcMembership(
   const event = new MatrixEvent({
     sender: userId,
     event_id: `$-ev-${randomUUID()}:example.org`,
+    type: EventType.GroupCallMemberPrefix,
     content: data,
   });
 
@@ -466,7 +468,9 @@ export class MockRTCSession extends TypedEventEmitter<
     counters: {},
   };
 
-  public leaveRoomSession = vitest.fn().mockResolvedValue(undefined);
+  public leaveRoomSession: ReturnType<typeof vitest.fn> = vitest
+    .fn()
+    .mockResolvedValue(undefined);
 
   public constructor(
     public readonly room: Room,
@@ -496,7 +500,7 @@ export class MockRTCSession extends TypedEventEmitter<
     return this;
   }
 
-  public updateCallIntent = vitest
+  public updateCallIntent: ReturnType<typeof vitest.fn> = vitest
     .fn()
     .mockImplementation(async () => Promise.resolve());
 
diff --git a/vitest.config.ts b/vitest.config.ts
index c89957c6..7f449f45 100644
--- a/vitest.config.ts
+++ b/vitest.config.ts
@@ -13,12 +13,13 @@ export default defineConfig((configEnv) =>
             classNameStrategy: "non-scoped",
           },
         },
-        setupFiles: ["src/vitest.setup.ts"],
+        setupFiles: ["vitest.setup.ts"],
         include: ["src/**/*.test.ts", "src/**/*.test.tsx"],
         coverage: {
           reporter: ["html", "json"],
-          include: ["src/"],
+          include: ["src/**/*.{ts,tsx,js,jsx}"],
           exclude: [
+            "src/**/*.md",
             "src/**/*.{d,test,stories}.{ts,tsx}",
             "src/utils/test.ts",
             "src/utils/test-viewmodel.ts",
diff --git a/vitest.setup.ts b/vitest.setup.ts
new file mode 100644
index 00000000..cff3a234
--- /dev/null
+++ b/vitest.setup.ts
@@ -0,0 +1,51 @@
+const storage: Record<string, string> = {};
+const localStoragePolyfill = {
+  getItem(key: string) {
+    return Object.prototype.hasOwnProperty.call(storage, key)
+      ? storage[key]
+      : null;
+  },
+  setItem(key: string, value: string) {
+    storage[key] = String(value);
+  },
+  removeItem(key: string) {
+    delete storage[key];
+  },
+  clear() {
+    for (const key in storage) {
+      delete storage[key];
+    }
+  },
+  key(index: number) {
+    const keys = Object.keys(storage);
+    return keys[index] ?? null;
+  },
+  get length() {
+    return Object.keys(storage).length;
+  },
+} as unknown as Storage;
+
+if (
+  typeof globalThis.localStorage === "undefined" ||
+  typeof globalThis.localStorage.clear !== "function"
+) {
+  Object.defineProperty(globalThis, "localStorage", {
+    value: localStoragePolyfill,
+    writable: true,
+    configurable: true,
+  });
+}
+
+if (
+  typeof window !== "undefined" &&
+  (typeof window.localStorage === "undefined" ||
+    typeof window.localStorage.clear !== "function")
+) {
+  Object.defineProperty(window, "localStorage", {
+    value: localStoragePolyfill,
+    writable: true,
+    configurable: true,
+  });
+}
+
+import "./src/vitest.setup.ts";