diff --git a/src/hackerrank/interview_preparation_kit/arrays/2d_array.test.ts b/src/hackerrank/interview_preparation_kit/arrays/2d_array.test.ts
index 812674bd..b72689d8 100644
--- a/src/hackerrank/interview_preparation_kit/arrays/2d_array.test.ts
+++ b/src/hackerrank/interview_preparation_kit/arrays/2d_array.test.ts
@@ -6,7 +6,7 @@ import TEST_CASES from './2d_array.testcases_test.json';
 
 describe('arrays: 2d Array hourglassSum', () => {
   it('hourglassSum Test Cases', () => {
-    expect.assertions(1);
+    expect.assertions(3);
 
     TEST_CASES.forEach((test) => {
       const answer = hourglassSum(test.input);
diff --git a/src/hackerrank/interview_preparation_kit/arrays/2d_array.testcases_test.json b/src/hackerrank/interview_preparation_kit/arrays/2d_array.testcases_test.json
index f32bdef3..91ecbd7d 100644
--- a/src/hackerrank/interview_preparation_kit/arrays/2d_array.testcases_test.json
+++ b/src/hackerrank/interview_preparation_kit/arrays/2d_array.testcases_test.json
@@ -10,5 +10,29 @@
       [0, 0, 1, 2, 4, 0]
     ],
     "expected": 19
+  },
+  {
+    "title": "Sample Test Case 1",
+    "input": [
+      [1, 1, 1, 0, 0, 0],
+      [0, 1, 0, 0, 0, 0],
+      [1, 1, 1, 0, 0, 0],
+      [0, 9, 2, -4, -4, 0],
+      [0, 0, 0, -2, 0, 0],
+      [0, 0, -1, -2, -4, 0]
+    ],
+    "expected": 13
+  },
+  {
+    "title": "Sample Test Case 2",
+    "input": [
+      [-9, -9, -9, 1, 1, 1],
+      [0, -9, 0, 4, 3, 2],
+      [-9, -9, -9, 1, 2, 3],
+      [0, 0, 8, 6, 6, 0],
+      [0, 0, 0, -2, 0, 0],
+      [0, 0, 1, 2, 4, 0]
+    ],
+    "expected": 28
   }
 ]