diff --git a/app/src/test/java/com/example/simpleparadox/listycity/CityListTest.java b/app/src/test/java/com/example/simpleparadox/listycity/CityListTest.java
index 787eab7e..25c02463 100644
--- a/app/src/test/java/com/example/simpleparadox/listycity/CityListTest.java
+++ b/app/src/test/java/com/example/simpleparadox/listycity/CityListTest.java
@@ -87,10 +87,17 @@ void testDeleteException() {
         });
     }
 
-    @Test
+   @Test
     void testCountCities() {
         CityList cityList = mockCityList();
 
         assertEquals(1, cityList.countCities());
+        City city = new City("ChangSha", "HuNan");
+        cityList.add(city);
+        assertEquals(2, cityList.countCities());
+        City city1 = new City("Hengyang", "HuNan");
+        cityList.add(city1);
+        assertEquals(3, cityList.countCities());
+    
     }
-}
\ No newline at end of file
+}