diff --git a/ets2panda/test/runtime/ets/enum_stringEnum_as_union.ets b/ets2panda/test/runtime/ets/enum_stringEnum_as_union.ets
new file mode 100644
index 0000000000000000000000000000000000000000..30308fa30261c5ed78c72cdfb99454f8be732b32
--- /dev/null
+++ b/ets2panda/test/runtime/ets/enum_stringEnum_as_union.ets
@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2025 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+enum StringEnum {
+    A = "A",
+    B = "B",
+    C = "C"
+}
+
+class C {
+    public a: string | StringEnum = StringEnum.A;
+}
+
+interface I {
+    a: string | StringEnum;
+}
+
+type UTA = string | StringEnum | number;
+
+function foo(a: string | StringEnum): string {
+    return a;
+}
+
+function main() {
+    let a: UTA = StringEnum.A;
+    let b: string | number = a;
+    arktest.assertEQ(a, b);
+    arktest.assertEQ(b, "A");
+    arktest.assertEQ(foo(StringEnum.B), "B");
+    // class
+    let c: C = new C();
+    arktest.assertEQ(c.a, "A");
+    // interface
+    let i: I = { a: StringEnum.C };
+    arktest.assertEQ(i.a, "C");
+}