diff --git a/src/ignore-node-warnings.ts b/src/ignore-node-warnings.ts
index 33d06bf9b..881590eb7 100644
--- a/src/ignore-node-warnings.ts
+++ b/src/ignore-node-warnings.ts
@@ -6,6 +6,7 @@ const nodeWarningPattern = /^\(node:\d+\) (.+)\n/m;
 export const ignoreNodeWarnings = () => {
 	const warningsToIgnore = [
 		'ExperimentalWarning: --experimental-loader is an experimental feature. This feature could change at any time',
+		'ExperimentalWarning: Custom ESM Loaders is an experimental feature. This feature could change at any time',
 		'ExperimentalWarning: Importing JSON modules is an experimental feature. This feature could change at any time',
 	];
 	let filterStderr = true;
diff --git a/tests/index.ts b/tests/index.ts
index 555333ba3..e47912530 100644
--- a/tests/index.ts
+++ b/tests/index.ts
@@ -16,6 +16,7 @@ const nodeVersions = [
 				'14.19.1',
 				'16.13.2',
 				'17.8.0',
+				'18.1.0',
 			]
 			: []
 	),