diff --git a/src/cli/main.ts b/src/cli/main.ts
index 6c88170..4520d11 100644
--- a/src/cli/main.ts
+++ b/src/cli/main.ts
@@ -52,21 +52,20 @@ export function parse (args: Iterable<string>): Flags {
 export async function main ({
 
         args = argv.slice(2),
-        input = stdin,
+        lines = createInterface(stdin),
         print = console.log,
         quit = exit,
 
 }: {
 
         args?: Iterable<string>,
-        input?: NodeJS.ReadableStream,
+        lines?: AsyncIterable<string>,
         print?: Fn<unknown, void>,
         quit?: Fn<number, void>,
 
 } = {}): Promise<void> {
 
     const flags = parse(args);
-    const lines = createInterface(input);
 
     let code = 0;
 
diff --git a/tests/cli/main.test.ts b/tests/cli/main.test.ts
index 3920d0d..2676aec 100644
--- a/tests/cli/main.test.ts
+++ b/tests/cli/main.test.ts
@@ -1,7 +1,7 @@
 import { describe, it } from '@std/testing/bdd';
 import * as mock from '@std/testing/mock';
 
-import { Readable } from 'node:stream';
+import { make_lines } from '../utils.ts';
 
 import {
 
@@ -17,7 +17,7 @@ describe('main', function () {
 
     it('collect lodash and nolyfill with extra ignore', async function () {
 
-        const input = Readable.from(`
+        const lines = make_lines(`
   "version": "1.2.3",
   "lockfileVersion": 2,
     "node_modules/@babel/core/node_modules/convert-source-map": {
@@ -28,7 +28,7 @@ describe('main', function () {
     "node_modules/lodash.merge": {
     "node_modules/buffer": {
       "version": "6.0.3",
-    },
+    }
         `);
 
         const args = [
@@ -42,17 +42,19 @@ describe('main', function () {
 
         const quit = mock.spy(() => {});
 
-        await main({ args, input, print, quit });
+        await main({ args, lines, print, quit });
 
         Array.of(
+
             'lodash.memoize',
             'function-bind',
             'buffer',
+
         ).forEach(function (pkg, i) {
+
             mock.assertSpyCallArg(print, i, 0, pkg);
-        });
 
-        mock.assertSpyCalls(print, 3);
+        });
 
         mock.assertSpyCallArg(quit, 0, 0, 1);
         mock.assertSpyCalls(quit, 1);
diff --git a/tests/utils.ts b/tests/utils.ts
index 593305b..291aad2 100644
--- a/tests/utils.ts
+++ b/tests/utils.ts
@@ -4,6 +4,16 @@ import { assertStrictEquals } from '@std/assert';
 
 
 
+export function make_lines (str: string): AsyncIterable<string> {
+
+    return ReadableStream.from(str.split('\n'));
+
+}
+
+
+
+
+
 export function assert__true (
 
         value: unknown,