diff --git a/app/__tests__/metadata.test.ts b/app/__tests__/metadata.test.ts
new file mode 100644
index 0000000..f3fba05
--- /dev/null
+++ b/app/__tests__/metadata.test.ts
@@ -0,0 +1,119 @@
+// app/__tests__/metadata.test.ts
+import { describe, it, expect, vi, beforeEach } from "vitest"
+
+// Mock modules that page renders depend on
+vi.mock("@/lib/db/index", () => ({
+  db: {
+    select: vi.fn(() => ({
+      from: vi.fn(() => ({
+        where: vi.fn(() => ({
+          orderBy: vi.fn(() => ({
+            limit: vi.fn(() => []),
+          })),
+        })),
+        innerJoin: vi.fn(() => ({
+          where: vi.fn(() => ({
+            groupBy: vi.fn(() => ({
+              orderBy: vi.fn(() => []),
+            })),
+          })),
+        })),
+      })),
+    })),
+  },
+}))
+
+vi.mock("@/lib/db/schema", () => ({
+  games: { id: "id", title: "title", slug: "slug", updatedAt: "updatedAt", capsuleImage: "capsuleImage", syncStatus: "syncStatus" },
+  gameVersions: { id: "id", gameId: "gameId", versionString: "versionString", buildId: "buildId" },
+  performanceEntries: { id: "id", versionId: "versionId", isRemoved: "isRemoved", hardwareSlug: "hardwareSlug", fpsAvg: "fpsAvg", fpsLow: "fpsLow", fpsHigh: "fpsHigh" },
+  hardware: { slug: "slug", name: "name", deviceType: "deviceType", sortOrder: "sortOrder" },
+  gameComments: { gameId: "gameId", id: "id" },
+  gamePlatformSupport: { gameId: "gameId", hardwareSlug: "hardwareSlug", protonStatus: "protonStatus" },
+  user: { id: "id", name: "name", image: "image", role: "role" },
+  entryScreenshots: { id: "id", entryId: "entryId", storageKey: "storageKey", orderIndex: "orderIndex" },
+}))
+
+vi.mock("drizzle-orm", () => ({
+  eq: vi.fn((col: unknown, val: unknown) => ({ col, val })),
+  and: vi.fn((...args: unknown[]) => args),
+  desc: vi.fn((col: unknown) => col),
+  or: vi.fn((...args: unknown[]) => args),
+  ne: vi.fn((col: unknown) => col),
+  isNull: vi.fn((col: unknown) => col),
+  inArray: vi.fn((col: unknown, vals: unknown) => ({ col, vals })),
+  sql: vi.fn((strings: TemplateStringsArray, ...values: unknown[]) => ({ raw: strings, vals: values })),
+}))
+
+vi.mock("@/lib/steam/sync", () => ({
+  isSyncStale: vi.fn(() => false),
+  syncSteamGame: vi.fn(() => Promise.resolve()),
+}))
+
+vi.mock("@/lib/storage", () => ({
+  getR2PublicUrl: vi.fn(() => "https://r2.example.com"),
+}))
+
+vi.mock("@/lib/auth", () => ({}))
+vi.mock("@/lib/auth-client", () => ({}))
+
+vi.mock("@/lib/updates", () => ({
+  getAllUpdates: vi.fn(() => []),
+  getAllUpdateSlugs: vi.fn(() => []),
+  getUpdateBySlug: vi.fn(() => Promise.resolve({ meta: { title: "", date: "", version: "", summary: "" }, html: "", headings: [] })),
+}))
+
+vi.mock("next/font/google", () => ({
+  Lexend: vi.fn(() => ({ variable: "font-mock" })),
+}))
+
+vi.mock("@/components/navbar", () => ({
+  default: vi.fn(() => null),
+}))
+
+describe("Page Metadata", () => {
+  describe("Root Layout", () => {
+    it("exports canonical URL", async () => {
+      const { metadata } = await import("@/app/layout")
+      expect(metadata.alternates?.canonical).toBe("https://deckyvault.xyz")
+    })
+  })
+
+  describe("Games page", () => {
+    it("has a unique title without duplicate brand name", async () => {
+      const { metadata } = await import("@/app/games/page")
+      expect(metadata.title).toBe("Games")
+    })
+  })
+
+  describe("Devices page", () => {
+    it("has a unique title without duplicate brand name", async () => {
+      const { metadata } = await import("@/app/devices/page")
+      expect(metadata.title).toBe("Devices")
+    })
+  })
+
+  describe("Compare layout", () => {
+    it("exports unique title and description", async () => {
+      try {
+        const { metadata } = await import("@/app/compare/layout")
+        expect(metadata.title).toBe("Compare Games")
+        expect(metadata.description).toBeDefined()
+      } catch {
+        throw new Error("app/compare/layout.tsx not created yet")
+      }
+    })
+  })
+
+  describe("Profile layout", () => {
+    it("exports unique title and description", async () => {
+      try {
+        const { metadata } = await import("@/app/profile/layout")
+        expect(metadata.title).toBe("Profile")
+        expect(metadata.description).toBeDefined()
+      } catch {
+        throw new Error("app/profile/layout.tsx not created yet")
+      }
+    })
+  })
+})
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