diff --git a/scripts/ts/test/test.basic.operations.ts b/scripts/ts/test/test.basic.operations.ts
index 3d4a585..0a70b87 100644
--- a/scripts/ts/test/test.basic.operations.ts
+++ b/scripts/ts/test/test.basic.operations.ts
@@ -9,6 +9,10 @@ class Test {
     return a + b;
   }
 
+  public add_LI_L(a: long, b: int): long {
+    return a + b;
+  }
+
   public divide_II_I(a: int, b: int): int {
     return a / b;
   }
@@ -36,6 +40,7 @@ class Test {
 
 console.log(new Test().add_II_I(1, 2));
 console.log(new Test().add_IL_L(1, 2));
+console.log(new Test().add_LI_L(1, 2));
 console.log(new Test().divide_II_I(3, 2));
 console.log(new Test().mod_II_I(3, 2));
 console.log(new Test().multiply_II_I(3, 2));
diff --git a/src/test/java/com/caoccao/javet/buddy/ts2java/TestBasicOperations.java b/src/test/java/com/caoccao/javet/buddy/ts2java/TestBasicOperations.java
index d5ce1ad..b0865bc 100644
--- a/src/test/java/com/caoccao/javet/buddy/ts2java/TestBasicOperations.java
+++ b/src/test/java/com/caoccao/javet/buddy/ts2java/TestBasicOperations.java
@@ -109,6 +109,18 @@ public void testAdd_IL_L() throws Exception {
         assertEquals(1 + 2L, method.invoke(object, 1, 2L));
     }
 
+    @Test
+    public void testAdd_LI_L() throws Exception {
+        Method method = clazz.getMethod("add_LI_L", long.class, int.class);
+        assertNotNull(method);
+        assertEquals(long.class, method.getReturnType());
+        assertEquals(2, method.getParameterCount());
+        assertEquals(long.class, method.getParameters()[0].getType());
+        assertEquals(int.class, method.getParameters()[1].getType());
+        Object object = clazz.getConstructor().newInstance();
+        assertEquals(1L + 2, method.invoke(object, 1L, 2));
+    }
+
     @Test
     public void testDivide_II_I() throws Exception {
         Method method = clazz.getMethod("divide_II_I", int.class, int.class);