diff --git a/package.json b/package.json
index dc2ab05e8af..a9c00a38b1f 100644
--- a/package.json
+++ b/package.json
@@ -15,7 +15,7 @@
     "ci:lint": "npm run lint:nofix",
     "ci:test": "npm run build:cjs && npm run build:bootstrap && npm run test:all",
     "ci:test:only": "npm run build:cjs && npm run build:bootstrap && npm run test:only",
-    "ci:coverage": "npm run build:cjs && nyc --reporter lcovonly mocha",
+    "ci:coverage": "npm run build:cjs && npm run build:bootstrap && nyc --reporter lcovonly mocha",
     "lint": "npx eslint . --fix --cache && npm run lint:markdown",
     "lint:nofix": "npx eslint . && npm run lint:markdown",
     "lint:markdown": "markdownlint --config markdownlint.json docs/**/*.md",
diff --git a/src/browser-entry.ts b/src/browser-entry.ts
index 228d6517e81..8f03c2d6209 100644
--- a/src/browser-entry.ts
+++ b/src/browser-entry.ts
@@ -1,2 +1,2 @@
-export { default as rollup } from './rollup/rollup';
+export { default as rollup, defineConfig } from './rollup/rollup';
 export { version as VERSION } from 'package.json';
diff --git a/src/node-entry.ts b/src/node-entry.ts
index a488fb584ac..d2a08e5f631 100644
--- a/src/node-entry.ts
+++ b/src/node-entry.ts
@@ -1,3 +1,3 @@
-export { default as rollup } from './rollup/rollup';
+export { default as rollup, defineConfig } from './rollup/rollup';
 export { default as watch } from './watch/watch-proxy';
 export { version as VERSION } from 'package.json';
diff --git a/test/cli/samples/config-defineConfig-cjs/_config.js b/test/cli/samples/config-defineConfig-cjs/_config.js
new file mode 100644
index 00000000000..48bf7c3a5ff
--- /dev/null
+++ b/test/cli/samples/config-defineConfig-cjs/_config.js
@@ -0,0 +1,5 @@
+module.exports = {
+	description: 'uses cjs config file which return config wrapped by defineConfig',
+	command: 'rollup --config rollup.config.js',
+	execute: true
+};
diff --git a/test/cli/samples/config-defineConfig-cjs/main.js b/test/cli/samples/config-defineConfig-cjs/main.js
new file mode 100644
index 00000000000..888cae37af9
--- /dev/null
+++ b/test/cli/samples/config-defineConfig-cjs/main.js
@@ -0,0 +1 @@
+module.exports = 42;
diff --git a/test/cli/samples/config-defineConfig-cjs/rollup.config.js b/test/cli/samples/config-defineConfig-cjs/rollup.config.js
new file mode 100644
index 00000000000..2827d477764
--- /dev/null
+++ b/test/cli/samples/config-defineConfig-cjs/rollup.config.js
@@ -0,0 +1,8 @@
+const { defineConfig } = require("../../../../dist/rollup");
+
+module.exports = defineConfig({
+	input: 'main.js',
+	output: {
+		format: 'cjs'
+	},
+});
diff --git a/test/cli/samples/config-defineConfig-mjs/_config.js b/test/cli/samples/config-defineConfig-mjs/_config.js
new file mode 100644
index 00000000000..bd51b3ca622
--- /dev/null
+++ b/test/cli/samples/config-defineConfig-mjs/_config.js
@@ -0,0 +1,6 @@
+module.exports = {
+	description: 'uses mjs config file which return config wrapped by defineConfig',
+	command: 'rollup --config rollup.config.mjs',
+	minNodeVersion: 13,
+	execute: true
+};
diff --git a/test/cli/samples/config-defineConfig-mjs/main.js b/test/cli/samples/config-defineConfig-mjs/main.js
new file mode 100644
index 00000000000..888cae37af9
--- /dev/null
+++ b/test/cli/samples/config-defineConfig-mjs/main.js
@@ -0,0 +1 @@
+module.exports = 42;
diff --git a/test/cli/samples/config-defineConfig-mjs/rollup.config.mjs b/test/cli/samples/config-defineConfig-mjs/rollup.config.mjs
new file mode 100644
index 00000000000..10abdde3d84
--- /dev/null
+++ b/test/cli/samples/config-defineConfig-mjs/rollup.config.mjs
@@ -0,0 +1,8 @@
+import { defineConfig } from "../../../../dist/es/rollup.js"
+
+export default defineConfig({
+	input: 'main.js',
+	output: {
+		format: 'cjs'
+	},
+});