diff --git a/src/esm/hook/utils.ts b/src/esm/hook/utils.ts
index e7cee7ff..37403600 100644
--- a/src/esm/hook/utils.ts
+++ b/src/esm/hook/utils.ts
@@ -28,7 +28,7 @@ export const tsExtensionsPattern = /\.([cm]?ts|[tj]sx)($|\?)/;
 export const isJsonPattern = /\.json(?:$|\?)/;
 
 const getFormatFromExtension = (fileUrl: string): ModuleFormat | undefined => {
-	const extension = path.extname(fileUrl);
+	const extension = path.extname(fileUrl.split('?')[0]);
 
 	if (extension === '.json') {
 		return 'json';
diff --git a/src/utils/transform/get-esbuild-options.ts b/src/utils/transform/get-esbuild-options.ts
index 58f872ab..1441d9ad 100644
--- a/src/utils/transform/get-esbuild-options.ts
+++ b/src/utils/transform/get-esbuild-options.ts
@@ -48,7 +48,7 @@ export const patchOptions = (
 	const originalSourcefile = options.sourcefile;
 
 	if (originalSourcefile) {
-		const extension = path.extname(originalSourcefile);
+		const extension = path.extname(originalSourcefile.split('?')[0]);
 
 		if (extension) {
 			// https://github.com/evanw/esbuild/issues/1932
diff --git a/tests/specs/api.ts b/tests/specs/api.ts
index 456672a3..bedd5e81 100644
--- a/tests/specs/api.ts
+++ b/tests/specs/api.ts
@@ -324,6 +324,26 @@ export default testSuite(({ describe }, node: NodeApis) => {
 						expect(stdout).toBe('Fails as expected 1\nfoo bar\nfoo bar\nFails as expected 2');
 					});
 
+					test('mts from commonjs', async () => {
+						await using fixture = await createFixture({
+							'import.cjs': `
+							const { tsImport } = require(${JSON.stringify(tsxEsmApiCjsPath)});
+
+							(async () => {
+								const { message } = await tsImport('./file.mts', __filename);
+								console.log(message);
+							})();
+							`,
+							'file.mts': 'export const message = "foo bar"',
+						});
+
+						const { stdout } = await execaNode(fixture.getPath('import.cjs'), [], {
+							nodePath: node.path,
+							nodeOptions: [],
+						});
+						expect(stdout).toBe('foo bar');
+					});
+
 					test('namespace allows async nested calls', async () => {
 						await using fixture = await createFixture({
 							'package.json': JSON.stringify({ type: 'module' }),