Index: node_modules/minimist/test/proto.js
===================================================================
--- node_modules/minimist/test/proto.js	(revision 81bc7da776d8cda42939ef4ab350c88d13b4941f)
+++ node_modules/minimist/test/proto.js	(revision 81bc7da776d8cda42939ef4ab350c88d13b4941f)
@@ -0,0 +1,64 @@
+'use strict';
+
+/* eslint no-proto: 0 */
+
+var parse = require('../');
+var test = require('tape');
+
+test('proto pollution', function (t) {
+	var argv = parse(['--__proto__.x', '123']);
+	t.equal({}.x, undefined);
+	t.equal(argv.__proto__.x, undefined);
+	t.equal(argv.x, undefined);
+	t.end();
+});
+
+test('proto pollution (array)', function (t) {
+	var argv = parse(['--x', '4', '--x', '5', '--x.__proto__.z', '789']);
+	t.equal({}.z, undefined);
+	t.deepEqual(argv.x, [4, 5]);
+	t.equal(argv.x.z, undefined);
+	t.equal(argv.x.__proto__.z, undefined);
+	t.end();
+});
+
+test('proto pollution (number)', function (t) {
+	var argv = parse(['--x', '5', '--x.__proto__.z', '100']);
+	t.equal({}.z, undefined);
+	t.equal((4).z, undefined);
+	t.equal(argv.x, 5);
+	t.equal(argv.x.z, undefined);
+	t.end();
+});
+
+test('proto pollution (string)', function (t) {
+	var argv = parse(['--x', 'abc', '--x.__proto__.z', 'def']);
+	t.equal({}.z, undefined);
+	t.equal('...'.z, undefined);
+	t.equal(argv.x, 'abc');
+	t.equal(argv.x.z, undefined);
+	t.end();
+});
+
+test('proto pollution (constructor)', function (t) {
+	var argv = parse(['--constructor.prototype.y', '123']);
+	t.equal({}.y, undefined);
+	t.equal(argv.y, undefined);
+	t.end();
+});
+
+test('proto pollution (constructor function)', function (t) {
+	var argv = parse(['--_.concat.constructor.prototype.y', '123']);
+	function fnToBeTested() {}
+	t.equal(fnToBeTested.y, undefined);
+	t.equal(argv.y, undefined);
+	t.end();
+});
+
+// powered by snyk - https://github.com/backstage/backstage/issues/10343
+test('proto pollution (constructor function) snyk', function (t) {
+	var argv = parse('--_.constructor.constructor.prototype.foo bar'.split(' '));
+	t.equal(function () {}.foo, undefined);
+	t.equal(argv.y, undefined);
+	t.end();
+});