diff --git a/cli.js b/cli.js
index d3603576..c2349154 100755
--- a/cli.js
+++ b/cli.js
@@ -180,7 +180,7 @@ sade2
   .option('--sw', 'Path to a script to be loaded in a service worker.')
   .option(
     '--assets',
-    'Folder with assets to be served by the http server.  (default process.cwd())'
+    'One or more folders with assets to be served by the http server.  (default process.cwd() will always be included)'
   )
   .option('--cwd', 'Current directory.', defaultOptions.cwd)
   .option(
@@ -217,6 +217,7 @@ sade2
        *
        * @type {import('./src/types.js').RunnerOptions}
        */
+
       const options = merge(config ? config.config : {}, {
         input: input ? [input, ...opts._] : undefined,
         testFiles: [],
diff --git a/mocks/assets/a/a.json b/mocks/assets/a/a.json
new file mode 100644
index 00000000..10c30dbc
--- /dev/null
+++ b/mocks/assets/a/a.json
@@ -0,0 +1 @@
+{ "a": 1 }
diff --git a/mocks/assets/b/b.txt b/mocks/assets/b/b.txt
new file mode 100644
index 00000000..95d09f2b
--- /dev/null
+++ b/mocks/assets/b/b.txt
@@ -0,0 +1 @@
+hello world
\ No newline at end of file
diff --git a/mocks/assets/test.a.js b/mocks/assets/test.a.js
new file mode 100644
index 00000000..9deb1b88
--- /dev/null
+++ b/mocks/assets/test.a.js
@@ -0,0 +1,27 @@
+/* eslint-disable no-undef */
+// eslint-disable-next-line strict
+const { is } = require('uvu/assert')
+
+describe('assets', () => {
+  it('can fetch a and package.json', async () => {
+    // assets from cwd is available
+    is(
+      await fetch(new URL('package.json', import.meta.url)).then(
+        (res) => res.status
+      ),
+      200
+    )
+
+    // assets from a
+    is(
+      await fetch(new URL('a.json', import.meta.url)).then((res) => res.status),
+      200
+    )
+
+    // assets from b
+    is(
+      await fetch(new URL('b.txt', import.meta.url)).then((res) => res.status),
+      404
+    )
+  })
+})
diff --git a/mocks/assets/test.ab.js b/mocks/assets/test.ab.js
new file mode 100644
index 00000000..01109653
--- /dev/null
+++ b/mocks/assets/test.ab.js
@@ -0,0 +1,27 @@
+/* eslint-disable no-undef */
+// eslint-disable-next-line strict
+const { is } = require('uvu/assert')
+
+describe('assets', () => {
+  it('can fetch a, b and package.json', async () => {
+    // assets from cwd is available
+    is(
+      await fetch(new URL('package.json', import.meta.url)).then(
+        (res) => res.status
+      ),
+      200
+    )
+
+    // assets from a
+    is(
+      await fetch(new URL('a.json', import.meta.url)).then((res) => res.status),
+      200
+    )
+
+    // assets from b
+    is(
+      await fetch(new URL('b.txt', import.meta.url)).then((res) => res.status),
+      200
+    )
+  })
+})
diff --git a/src/node/runner.js b/src/node/runner.js
index 731d4795..3d1c8f40 100644
--- a/src/node/runner.js
+++ b/src/node/runner.js
@@ -28,7 +28,7 @@ const merge = mergeOptions.bind({ ignoreUndefined: true })
  */
 const defaultOptions = {
   cwd: process.cwd(),
-  assets: '',
+  assets: undefined,
   browser: 'chromium',
   debug: false,
   mode: 'main', // worker
diff --git a/src/types.d.ts b/src/types.d.ts
index 2872acc5..4de7a813 100644
--- a/src/types.d.ts
+++ b/src/types.d.ts
@@ -16,7 +16,7 @@ export interface RunnerOptions {
   mode: 'main' | 'worker' | 'node'
   incognito: boolean
   extension: boolean
-  assets: string
+  assets?: string[]
   before?: string
   sw?: string
   cov: boolean
@@ -56,7 +56,7 @@ export interface CliOptions {
   watch?: boolean
   before?: string
   sw?: string
-  assets: string
+  assets?: string[]
   cwd: string
   extensions: string
   config?: string
diff --git a/src/utils/index.js b/src/utils/index.js
index 5f8663bf..52f2c02d 100644
--- a/src/utils/index.js
+++ b/src/utils/index.js
@@ -31,7 +31,7 @@ const merge = mergeOptions.bind({
  */
 export const defaultOptions = {
   cwd: process.cwd(),
-  assets: '',
+  assets: undefined,
   browser: 'chromium',
   debug: false,
   mode: 'main', // worker
@@ -592,13 +592,21 @@ function getPort(port = 3000, host = '127.0.0.1') {
  *
  * @param {string} dir - Runner directory
  * @param {string} cwd - Current working directory
- * @param {string} assets - Assets directory
+ * @param {string[]| undefined} assets - Assets directories
  * @returns {Promise<{ url: string; server: import('http').Server }>}
  */
 export async function createPolka(dir, cwd, assets) {
   const host = '127.0.0.1'
   const port = await getPort(0, host)
   const url = `http://${host}:${port}/`
+  if (typeof assets === 'string') {
+    assets = [assets]
+  } else if (assets === undefined || assets === null) {
+    assets = []
+  }
+  if (!assets.includes(cwd)) {
+    assets.push(cwd)
+  }
   return new Promise((resolve, reject) => {
     const { server } = polka()
       .use(
@@ -618,22 +626,24 @@ export async function createPolka(dir, cwd, assets) {
       )
       .use(
         // @ts-ignore
-        sirv(path.join(cwd, assets), {
-          dev: true,
-          setHeaders: (
-            /** @type {{ setHeader: (arg0: string, arg1: string) => void; }} */ rsp,
-            /** @type {string} */ pathname
-          ) => {
-            // workaround for https://github.com/lukeed/sirv/issues/158 - we
-            // can't unset the `Content-Encoding` header because sirv sets it
-            // after this function is invoked and will only set it if it's not
-            // already set, so we need to set it to a garbage value that will be
-            // ignored by browsers
-            if (pathname.endsWith('.gz')) {
-              rsp.setHeader('Content-Encoding', 'unsupported-encoding')
-            }
-          },
-        })
+        ...assets.map((dir) =>
+          sirv(dir, {
+            dev: true,
+            setHeaders: (
+              /** @type {{ setHeader: (arg0: string, arg1: string) => void; }} */ rsp,
+              /** @type {string} */ pathname
+            ) => {
+              // workaround for https://github.com/lukeed/sirv/issues/158 - we
+              // can't unset the `Content-Encoding` header because sirv sets it
+              // after this function is invoked and will only set it if it's not
+              // already set, so we need to set it to a garbage value that will be
+              // ignored by browsers
+              if (pathname.endsWith('.gz')) {
+                rsp.setHeader('Content-Encoding', 'unsupported-encoding')
+              }
+            },
+          })
+        )
       )
       .listen(port, host, (/** @type {Error} */ err) => {
         if (err) {
diff --git a/test.js b/test.js
index c58a5b06..6ebc7917 100644
--- a/test.js
+++ b/test.js
@@ -310,6 +310,36 @@ describe('uvu', () => {
   })
 })
 
+describe('assets', () => {
+  it('1 asset', async () => {
+    const proc = await execa('./cli.js', [
+      'mocks/assets/test.a.js',
+      '--runner',
+      'mocha',
+      '--assets',
+      './mocks/assets/a',
+    ])
+
+    is(proc.exitCode, 0, 'exit code')
+    ok(proc.stdout.includes('passing'), 'process stdout')
+  })
+
+  it('2 assets', async () => {
+    const proc = await execa('./cli.js', [
+      'mocks/assets/test.ab.js',
+      '--runner',
+      'mocha',
+      '--assets',
+      './mocks/assets/a',
+      '--assets',
+      './mocks/assets/b',
+    ])
+
+    is(proc.exitCode, 0, 'exit code')
+    ok(proc.stdout.includes('passing'), 'process stdout')
+  })
+})
+
 describe.skip('benchmark', function () {
   it('benchmark', async () => {
     const proc = await execa('./cli.js', [