diff --git a/apps/desktop/package.json b/apps/desktop/package.json
index 3e32c06fb03..645d35a54c2 100644
--- a/apps/desktop/package.json
+++ b/apps/desktop/package.json
@@ -9,6 +9,7 @@
 		"localdev": "dotenv -e ../../.env -- vinxi dev --port 3002",
 		"build": "vinxi build",
 		"tauri": "tauri",
+		"test": "vitest run",
 		"test:memory": "node scripts/desktop-memory-soak.js",
 		"test:memory:unit": "vitest run scripts/desktop-memory-soak.test.js"
 	},
diff --git a/packages/utils/package.json b/packages/utils/package.json
index 82f842d4c57..8283971c1b4 100644
--- a/packages/utils/package.json
+++ b/packages/utils/package.json
@@ -6,7 +6,8 @@
 	},
 	"scripts": {
 		"typecheck": "tsc -b",
-		"build": "tsdown"
+		"build": "tsdown",
+		"test": "vitest run"
 	},
 	"publishConfig": {
 		"main": "./dist/index.js"
@@ -16,7 +17,8 @@
 		"react-dom": "^19.1.1",
 		"react-router-dom": "^6.18.0",
 		"tsconfig": "workspace:*",
-		"typescript": "^5.8.3"
+		"typescript": "^5.8.3",
+		"vitest": "~2.1.9"
 	},
 	"dependencies": {
 		"@aws-sdk/client-s3": "^3.485.0",
diff --git a/packages/utils/src/helpers.test.ts b/packages/utils/src/helpers.test.ts
new file mode 100644
index 00000000000..1a9e201972b
--- /dev/null
+++ b/packages/utils/src/helpers.test.ts
@@ -0,0 +1,50 @@
+import { describe, expect, it } from "vitest";
+
+import {
+	calculateStrokeDashoffset,
+	classNames,
+	getDisplayProgress,
+	getProgressCircleConfig,
+	isEmailAllowedByRestriction,
+	uuidFormat,
+	uuidParse,
+} from "./helpers";
+
+describe("helpers", () => {
+	it("merges class names and resolves conflicting Tailwind utilities", () => {
+		expect(classNames("px-2 text-sm", false, "px-4")).toBe("text-sm px-4");
+	});
+
+	it("round-trips uuid formatting helpers", () => {
+		const formatted = "123e4567-e89b-12d3-a456-426614174000";
+		const compact = "123e4567e89b12d3a456426614174000";
+
+		expect(uuidParse(formatted)).toBe(compact);
+		expect(uuidFormat(compact)).toBe(formatted);
+	});
+
+	it("calculates progress circle geometry", () => {
+		const { circumference } = getProgressCircleConfig();
+
+		expect(calculateStrokeDashoffset(25, circumference)).toBeCloseTo(
+			circumference * 0.75,
+		);
+		expect(calculateStrokeDashoffset(100, circumference)).toBe(0);
+	});
+
+	it("prefers upload progress over processing progress", () => {
+		expect(getDisplayProgress(42, 10)).toBe(42);
+		expect(getDisplayProgress(undefined, 64)).toBe(64);
+	});
+
+	it("allows emails by exact address or domain restrictions", () => {
+		expect(isEmailAllowedByRestriction("owner@cap.so", "")).toBe(true);
+		expect(isEmailAllowedByRestriction("owner@cap.so", "cap.so")).toBe(true);
+		expect(
+			isEmailAllowedByRestriction("owner@cap.so", "admin@example.com"),
+		).toBe(false);
+		expect(
+			isEmailAllowedByRestriction("admin@example.com", " admin@example.com "),
+		).toBe(true);
+	});
+});
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index ce77b06b4f8..b6f84808fab 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -1323,6 +1323,9 @@ importers:
       typescript:
         specifier: ^5.8.3
         version: 5.8.3
+      vitest:
+        specifier: ~2.1.9
+        version: 2.1.9(@types/node@22.15.17)(jsdom@26.1.0)(terser@5.44.0)
 
   packages/web-api-contract:
     dependencies: