diff --git a/lib/test-worker.js b/lib/test-worker.js
index 84fba364e..952d55bb9 100644
--- a/lib/test-worker.js
+++ b/lib/test-worker.js
@@ -27,7 +27,13 @@ globals.options = opts;
 
 const serializeError = require('./serialize-error');
 
-(opts.require || []).forEach(x => require(x));
+(opts.require || []).forEach(x => {
+	if (/[/\\]@std[/\\]esm[/\\]index\.js$/.test(x)) {
+		require = require(x)(module); // eslint-disable-line no-global-assign
+	} else {
+		require(x);
+	}
+});
 
 adapter.installSourceMapSupport();
 adapter.installPrecompilerHook();
diff --git a/package-lock.json b/package-lock.json
index 8430164b4..7466d6eb5 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -130,6 +130,12 @@
         }
       }
     },
+    "@std/esm": {
+      "version": "0.19.1",
+      "resolved": "https://registry.npmjs.org/@std/esm/-/esm-0.19.1.tgz",
+      "integrity": "sha512-4Ph4hdaDIkt5sChK565oU16Wa9jcBwLbiNAMEB6fyQZlBw5uz3UpxTo/ZohjeILgJfNtb/l1HzVql1ys5s74Ww==",
+      "dev": true
+    },
     "abbrev": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/abbrev/-/abbrev-1.1.0.tgz",
diff --git a/package.json b/package.json
index 76e5aa31e..8ca028aeb 100644
--- a/package.json
+++ b/package.json
@@ -146,6 +146,7 @@
 		"update-notifier": "^2.3.0"
 	},
 	"devDependencies": {
+		"@std/esm": "^0.19.1",
 		"cli-table2": "^0.2.0",
 		"codecov": "^3.0.0",
 		"del": "^3.0.0",
diff --git a/test/fixture/std-esm/.esmrc b/test/fixture/std-esm/.esmrc
new file mode 100644
index 000000000..807ee2da6
--- /dev/null
+++ b/test/fixture/std-esm/.esmrc
@@ -0,0 +1,3 @@
+{
+	"esm": "cjs"
+}
diff --git a/test/fixture/std-esm/index.js b/test/fixture/std-esm/index.js
new file mode 100644
index 000000000..d02ba545b
--- /dev/null
+++ b/test/fixture/std-esm/index.js
@@ -0,0 +1 @@
+export default 'foo';
diff --git a/test/fixture/std-esm/test.js b/test/fixture/std-esm/test.js
new file mode 100644
index 000000000..4213c80a0
--- /dev/null
+++ b/test/fixture/std-esm/test.js
@@ -0,0 +1,6 @@
+import test from '../../../';
+import m from '.';
+
+test('works', t => {
+	t.is(m, 'foo');
+});
diff --git a/test/fork.js b/test/fork.js
index c31e9ebf8..86cf966b7 100644
--- a/test/fork.js
+++ b/test/fork.js
@@ -135,6 +135,17 @@ test('babelrc is ignored', t => {
 		});
 });
 
+test('@std/esm support', t => {
+	return fork(fixture('std-esm/test.js'), {
+		require: [require.resolve('@std/esm')]
+	})
+		.run({})
+		.then(info => {
+			t.is(info.stats.passCount, 1);
+			t.end();
+		});
+});
+
 // TODO: Skipped until we can do this properly in #1455
 test('color support is initialized correctly', t => {
 	t.plan(1);