diff --git a/.github/workflows/node.js.yml b/.github/workflows/node.js.yml
new file mode 100644
index 0000000..587745f
--- /dev/null
+++ b/.github/workflows/node.js.yml
@@ -0,0 +1,23 @@
+name: Run tests
+on:
+  push:
+    branches: ["main"]
+  pull_request:
+    branches: ["main"]
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Use Node.js
+        uses: actions/setup-node@v4
+        with:
+          cache-dependency-path: |
+            example/package.json
+            package.json
+          node-version: "18.x"
+          cache: "npm"
+      - run: npm i
+      - run: npm ci
+      - run: cd example && npm i && cd ..
+      - run: npm test
diff --git a/package.json b/package.json
index 9453ed3..4197418 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,10 @@
     "build:cjs": "tsc --project ./commonjs.json && echo '{\\n  \"type\": \"commonjs\"\\n}' > dist/commonjs/package.json",
     "dev": "cd example; npm run dev",
     "typecheck": "tsc --noEmit",
-    "prepare": "npm run build"
+    "prepare": "npm run build",
+    "test": "vitest",
+    "test:debug": "vitest --inspect-brk --no-file-parallelism",
+    "test:coverage": "vitest run --coverage --coverage.reporter=text"
   },
   "files": [
     "dist",
diff --git a/src/client/index.test.ts b/src/client/index.test.ts
new file mode 100644
index 0000000..3a49cf8
--- /dev/null
+++ b/src/client/index.test.ts
@@ -0,0 +1,15 @@
+import { expect, test } from "vitest";
+import { ConvexError } from "convex/values";
+import { isRateLimitError, RateLimitError } from "./index.js";
+test("isRateLimitError", () => {
+  expect(
+    isRateLimitError(
+      new ConvexError({
+        kind: "RateLimited",
+        name: "foo",
+        retryAfter: 1,
+      } as RateLimitError)
+    )
+  ).toBe(true);
+  expect(isRateLimitError(new ConvexError({ kind: "foo" }))).toBe(false);
+});
diff --git a/src/client/index.ts b/src/client/index.ts
index 121d5ac..7745822 100644
--- a/src/client/index.ts
+++ b/src/client/index.ts
@@ -27,11 +27,7 @@ export const HOUR = 60 * MINUTE;
 export function isRateLimitError(
   error: unknown
 ): error is { data: RateLimitError } {
-  return (
-    error instanceof ConvexError &&
-    "kind" in error.data &&
-    error.data.kind === "RateLimited"
-  );
+  return error instanceof ConvexError && error.data["kind"] === "RateLimited";
 }
 
 /**