diff --git a/packages/core/__tests__/issue-9520.mjs b/packages/core/__tests__/issue-9520.mjs
new file mode 100644
index 000000000000..29a1290b81d0
--- /dev/null
+++ b/packages/core/__tests__/issue-9520.mjs
@@ -0,0 +1,34 @@
+import swc from "..";
+
+it("should transform synchronously", () => {
+    const { code } = swc.transformSync(`export function foo() {
+	if (false) {
+	}
+	return 'foo';
+};`);
+
+    expect(code).toMatchInlineSnapshot(`
+        "export function foo() {
+            if (false) {}
+            return 'foo';
+        }
+        ;
+        "
+    `);
+});
+
+it("should transform asynchronously", async () => {
+    const { code } = await swc.transform(`export function foo() {
+	if (false) {
+	}
+	return 'foo';
+};`);
+    expect(code).toMatchInlineSnapshot(`
+        "export function foo() {
+            if (false) {}
+            return 'foo';
+        }
+        ;
+        "
+    `);
+});