diff --git a/Maximal_square_Test.js b/Maximal_square_Test.js
new file mode 100644
index 0000000..edadb2b
--- /dev/null
+++ b/Maximal_square_Test.js
@@ -0,0 +1,37 @@
+const assert = require('assert');
+const {Maximalsquare } = require('../LeetcodeProblems/Maximal_square');
+
+function test1() {
+  var matrix = [
+    [1, 0, 1, 0, 0],
+    [1, 0, 1, 1, 1],
+    [1, 1, 1, 1 1],
+    [1, 0, 0, 1, 0],
+  ]
+
+  assert.strictEqual(Maximalsquare(matrix), 4);
+}
+
+function test2() {
+  var matrix = [
+    [0, 1],
+    [1,0]
+  ]
+
+  assert.strictEqual(Maximalsquare(matrix), 1);
+}
+
+function test3(){
+  var matrix = [
+    [0]
+    ]
+   assert.strictEqual(Maximalsquare(matrix), 0);
+}
+  
+function test() {
+  test1();
+  test2();
+  test3();
+}
+
+module.exports.test = test