diff --git a/apps/main/package.json b/apps/main/package.json
index 090a056dc..8e39c6f0b 100644
--- a/apps/main/package.json
+++ b/apps/main/package.json
@@ -18,6 +18,7 @@
   "main": "./src/index.ts",
   "scripts": {
     "build": "tsup",
+    "test": "vitest",
     "typecheck": "tsup && tsc --noEmit"
   },
   "dependencies": {
diff --git a/apps/main/src/lib/proxy.test.ts b/apps/main/src/lib/proxy.test.ts
new file mode 100644
index 000000000..3dba79314
--- /dev/null
+++ b/apps/main/src/lib/proxy.test.ts
@@ -0,0 +1,82 @@
+import { session } from "electron"
+import type { Mock } from "vitest"
+import { beforeEach, describe, expect, it, vi } from "vitest"
+
+import { logger } from "../logger"
+import { getProxyConfig, setProxyConfig, updateProxy } from "./proxy"
+import { store } from "./store"
+
+vi.mock("electron", () => ({
+  session: {
+    defaultSession: {
+      setProxy: vi.fn(),
+    },
+  },
+}))
+
+vi.mock("./store", () => ({
+  store: {
+    set: vi.fn(),
+    get: vi.fn(),
+  },
+}))
+
+vi.mock("../logger", () => ({
+  logger: {
+    log: vi.fn(),
+  },
+}))
+
+describe("proxy", () => {
+  beforeEach(() => {
+    vi.clearAllMocks()
+  })
+
+  describe("setProxyConfig", () => {
+    it("should set proxy config and return true for valid proxy", () => {
+      const proxy = "http://localhost:8080"
+      const result = setProxyConfig(proxy)
+      expect(store.set).toHaveBeenCalledWith("proxy", "http://localhost:8080")
+      expect(result).toBe(true)
+    })
+
+    it("should return false for invalid proxy", () => {
+      const proxy = "invalid-proxy"
+      const result = setProxyConfig(proxy)
+      expect(store.set).toHaveBeenCalledWith("proxy", undefined)
+      expect(result).toBe(false)
+    })
+  })
+
+  describe("getProxyConfig", () => {
+    it("should return normalized proxy config if set", () => {
+      ;(store.get as Mock).mockReturnValue("http://localhost:8080")
+      const result = getProxyConfig()
+      expect(result).toBe("http://localhost:8080")
+    })
+
+    it("should compatible dirty data", () => {
+      ;(store.get as Mock).mockReturnValue("http://localhost:8080,direct://")
+      const result = getProxyConfig()
+      expect(result).toBe("http://localhost:8080")
+    })
+  })
+
+  describe("updateProxy", () => {
+    it("should set system proxy mode if no proxy config is set", () => {
+      ;(store.get as Mock).mockReturnValue("")
+      updateProxy()
+      expect(session.defaultSession.setProxy).toHaveBeenCalledWith({ mode: "system" })
+    })
+
+    it("should set proxy rules if proxy config is set", () => {
+      ;(store.get as Mock).mockReturnValue("http://localhost:8080")
+      updateProxy()
+      expect(logger.log).toHaveBeenCalledWith("Loading proxy: http://localhost:8080,direct://")
+      expect(session.defaultSession.setProxy).toHaveBeenCalledWith({
+        proxyRules: "http://localhost:8080,direct://",
+        proxyBypassRules: "<local>",
+      })
+    })
+  })
+})
diff --git a/apps/main/src/lib/proxy.ts b/apps/main/src/lib/proxy.ts
index 695a3b48c..ed84a78d1 100644
--- a/apps/main/src/lib/proxy.ts
+++ b/apps/main/src/lib/proxy.ts
@@ -38,18 +38,17 @@ const normalizeProxyUri = (userProxy: string) => {
   if (!userProxy) {
     return
   }
+  // Only use the first proxy if there are multiple urls
+  const firstInput = userProxy.split(",")[0]
+
   try {
-    const proxyUrl = new URL(userProxy)
+    const proxyUrl = new URL(firstInput)
     if (!URL_SCHEME.has(proxyUrl.protocol) || !proxyUrl.hostname || !proxyUrl.port) {
       return
     }
     // There are multiple ways to specify a proxy in Electron,
     // but for security reasons, we only support simple proxy URLs for now.
-    return [
-      `${proxyUrl.protocol}//${proxyUrl.hostname}:${proxyUrl.port}`,
-      // Failing over to using no proxy if the proxy is unavailable
-      "direct://",
-    ].join(",")
+    return `${proxyUrl.protocol}//${proxyUrl.hostname}:${proxyUrl.port}`
   } catch {
     return
   }
@@ -67,10 +66,15 @@ export const updateProxy = () => {
     })
     return
   }
+  const proxyRules = [
+    proxyUri,
+    // Failing over to using no proxy if the proxy is unavailable
+    "direct://",
+  ].join(",")
 
-  logger.log(`Loading proxy: ${proxyUri}`)
+  logger.log(`Loading proxy: ${proxyRules}`)
   session.defaultSession.setProxy({
-    proxyRules: proxyUri,
+    proxyRules,
     proxyBypassRules: BYPASS_RULES,
   })
 }
diff --git a/apps/main/vitest.config.ts b/apps/main/vitest.config.ts
new file mode 100644
index 000000000..76797e786
--- /dev/null
+++ b/apps/main/vitest.config.ts
@@ -0,0 +1,22 @@
+import { resolve } from "node:path"
+import { fileURLToPath } from "node:url"
+
+import tsconfigPath from "vite-tsconfig-paths"
+import { defineProject } from "vitest/config"
+
+const __dirname = fileURLToPath(new URL(".", import.meta.url))
+
+export default defineProject({
+  root: "./",
+  test: {
+    globals: true,
+    environment: "node",
+    includeSource: [resolve(__dirname, ".")],
+  },
+
+  plugins: [
+    tsconfigPath({
+      projects: ["./tsconfig.json"],
+    }),
+  ],
+})
diff --git a/package.json b/package.json
index 6ef6beed7..ef9cb6967 100644
--- a/package.json
+++ b/package.json
@@ -32,7 +32,7 @@
     "publish": "electron-vite build && electron-forge publish",
     "start": "electron-vite preview",
     "sync:ab": "tsx scripts/pull-ab-flags.ts",
-    "test": "pnpm -F web run test",
+    "test": "pnpm --recursive run test",
     "typecheck": "npm run typecheck:node && npm run typecheck:web",
     "typecheck:node": "pnpm -F electron-main run typecheck",
     "typecheck:web": "pnpm -F web run typecheck"