diff --git a/package.json b/package.json
index e0339d9b..851674ad 100644
--- a/package.json
+++ b/package.json
@@ -68,9 +68,9 @@
 		"expect-type": "^0.16.0",
 		"express": "^4.18.2",
 		"pify": "^6.1.0",
-		"playwright": "^1.39.0",
+		"playwright": "^1.40.1",
 		"raw-body": "^2.5.2",
-		"ts-node": "^10.9.1",
+		"tsx": "^4.7.0",
 		"typescript": "^5.2.2",
 		"xo": "^0.56.0"
 	},
@@ -94,8 +94,9 @@
 			"ts": "module"
 		},
 		"nodeArguments": [
-			"--loader=ts-node/esm"
-		]
+			"--import=tsx/esm"
+		],
+		"workerThreads": false
 	},
 	"nyc": {
 		"reporter": [
diff --git a/test/headers.ts b/test/headers.ts
index f2235a28..17c20a48 100644
--- a/test/headers.ts
+++ b/test/headers.ts
@@ -43,7 +43,7 @@ test('`user-agent`', async t => {
 	server.get('/', echoHeaders);
 
 	const headers = await ky.get(server.url).json<IncomingHttpHeaders>();
-	t.is(headers['user-agent'], 'undici');
+	t.is(headers['user-agent'], 'node');
 });
 
 test('`accept-encoding`', async t => {
@@ -82,7 +82,7 @@ test('does not remove user headers from `url` object argument', async t => {
 		.json<IncomingHttpHeaders>();
 
 	t.is(headers.accept, 'application/json');
-	t.is(headers['user-agent'], 'undici');
+	t.is(headers['user-agent'], 'node');
 	t.is(headers['accept-encoding'], 'gzip, deflate');
 	t.is(headers['x-request-id'], 'value');
 });
diff --git a/tsconfig.json b/tsconfig.json
index 168f7959..d9a03892 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -2,10 +2,5 @@
 	"extends": "@sindresorhus/tsconfig",
 	"include": [
 		"source"
-	],
-	"ts-node": {
-		"transpileOnly": true,
-		"files": true,
-		"experimentalResolver": true
-	}
+	]
 }