diff --git a/src/test/java/CalculationsTest.java b/src/test/java/CalculationsTest.java
index 29d2496..52c5e17 100644
--- a/src/test/java/CalculationsTest.java
+++ b/src/test/java/CalculationsTest.java
@@ -16,5 +16,8 @@ public class CalculationsTest {
         // Test with zero
         assertEquals(0, calc.calculateSquare(0));
 
+        // Test with a large number
+        assertEquals(1000000, calc.calculateSquare(1000));
+
     }
 }