diff --git a/src/services/code-index/embedders/__tests__/openrouter.spec.ts b/src/services/code-index/embedders/__tests__/openrouter.spec.ts
new file mode 100644
index 0000000000..c21b437704
--- /dev/null
+++ b/src/services/code-index/embedders/__tests__/openrouter.spec.ts
@@ -0,0 +1,96 @@
+// npx vitest run src/services/code-index/embedders/__tests__/openrouter.spec.ts
+
+import { describe, it, expect, vi, beforeEach } from "vitest"
+import { OpenRouterEmbedder } from "../openrouter"
+import { OpenAICompatibleEmbedder } from "../openai-compatible"
+import { t } from "../../../../i18n"
+
+vi.mock("../../../../i18n", () => ({
+	t: (key: string, params?: any) => {
+		const translations: Record<string, string> = {
+			"embeddings:validation.apiKeyRequired": "API key is required",
+		}
+		return translations[key] || key
+	},
+}))
+
+// Mock the parent class
+vi.mock("../openai-compatible")
+
+describe("OpenRouterEmbedder", () => {
+	beforeEach(() => {
+		vi.clearAllMocks()
+		// Mock the OpenAICompatibleEmbedder constructor
+		vi.mocked(OpenAICompatibleEmbedder).mockImplementation(function (
+			this: any,
+			baseUrl: string,
+			apiKey: string,
+			modelId: string,
+			maxTokens: number,
+		) {
+			// Store constructor arguments for verification
+			this.baseUrl = baseUrl
+			this.apiKey = apiKey
+			this.modelId = modelId
+			this.maxTokens = maxTokens
+
+			// Mock methods
+			this.createEmbeddings = vi.fn()
+			this.validateConfiguration = vi.fn()
+
+			// Return this for chaining
+			return this
+		} as any)
+	})
+
+	describe("constructor", () => {
+		it("should create an instance with valid API key", () => {
+			const embedder = new OpenRouterEmbedder("test-api-key")
+			expect(embedder).toBeDefined()
+			expect(OpenAICompatibleEmbedder).toHaveBeenCalledWith(
+				"https://openrouter.ai/api/v1",
+				"test-api-key",
+				"openai/text-embedding-3-small",
+				8191,
+			)
+		})
+
+		it("should use custom model ID when provided", () => {
+			const embedder = new OpenRouterEmbedder("test-api-key", "openai/text-embedding-3-large")
+			expect(embedder).toBeDefined()
+			expect(OpenAICompatibleEmbedder).toHaveBeenCalledWith(
+				"https://openrouter.ai/api/v1",
+				"test-api-key",
+				"openai/text-embedding-3-large",
+				8191,
+			)
+		})
+
+		it("should use custom base URL when provided", () => {
+			const embedder = new OpenRouterEmbedder("test-api-key", undefined, "https://custom.openrouter.ai/api/v1")
+			expect(embedder).toBeDefined()
+			expect(OpenAICompatibleEmbedder).toHaveBeenCalledWith(
+				"https://custom.openrouter.ai/api/v1",
+				"test-api-key",
+				"openai/text-embedding-3-small",
+				8191,
+			)
+		})
+
+		it("should throw error when API key is not provided", () => {
+			expect(() => new OpenRouterEmbedder(undefined as any)).toThrow("API key is required")
+		})
+
+		it("should throw error when API key is empty string", () => {
+			expect(() => new OpenRouterEmbedder("")).toThrow("API key is required")
+		})
+	})
+
+	describe("embedderInfo", () => {
+		it("should return openrouter as the embedder name", () => {
+			const embedder = new OpenRouterEmbedder("test-api-key")
+			// The embedderInfo getter in OpenRouterEmbedder overrides the parent class
+			expect(embedder.embedderInfo).toEqual({ name: "openrouter" })
+		})
+	})
+})