diff --git a/lab1/main_test.js b/lab1/main_test.js
index 74a716b4..9ce6dd01 100644
--- a/lab1/main_test.js
+++ b/lab1/main_test.js
@@ -1,23 +1,31 @@
 const test = require('node:test');
 const assert = require('assert');
 const { MyClass, Student } = require('./main');
+myclass = new MyClass();
+student = new Student();
+student.setName('John');
 
 test("Test MyClass's addStudent", () => {
-    // TODO
-    throw new Error("Test not implemented");
+    assert.strictEqual(myclass.addStudent(1), -1);
+    assert.strictEqual(myclass.addStudent(student), 0);
 });
 
 test("Test MyClass's getStudentById", () => {
-    // TODO
-    throw new Error("Test not implemented");
+    myclass.addStudent(student);
+    assert.strictEqual(myclass.getStudentById(0),student);
+    assert.strictEqual(myclass.getStudentById(-1),null);
 });
 
 test("Test Student's setName", () => {
-    // TODO
-    throw new Error("Test not implemented");
+    assert.strictEqual(student.name,'John');
+    myclass.getStudentById(0).setName(12);
+    assert.strictEqual(myclass.getStudentById(0).getName(),'John');
 });
 
 test("Test Student's getName", () => {
     // TODO
-    throw new Error("Test not implemented");
-});
\ No newline at end of file
+    assert.strictEqual(myclass.getStudentById(0).getName(),student.name);
+    student2 = new Student();
+    myclass.addStudent(student2);
+    assert.strictEqual(myclass.getStudentById(2).getName(),'');
+});
diff --git a/lab3/main_test.js b/lab3/main_test.js
index 0663faf5..cb218e01 100644
--- a/lab3/main_test.js
+++ b/lab3/main_test.js
@@ -1,6 +1,7 @@
 const {describe, it} = require('node:test');
 const assert = require('assert');
 const { Calculator } = require('./main');
+
 const test = require('node:test');
 // TODO: write your tests here
 test("Calculator's exp",()=>{