diff --git a/api/tests/conftest.py b/api/tests/conftest.py
new file mode 100644
index 0000000..23c403c
--- /dev/null
+++ b/api/tests/conftest.py
@@ -0,0 +1,15 @@
+import pytest
+from app import create_app
+from models import db
+
+@pytest.fixture
+def test_client():
+    """Creates a new instance of test app."""
+    app = create_app("testing")
+    
+    with app.test_client() as client:
+        with app.app_context():
+            db.create_all()
+            yield client
+            db.session.remove()
+            db.drop_all()
diff --git a/api/tests/tests.py b/api/tests/tests.py
new file mode 100644
index 0000000..da95b80
--- /dev/null
+++ b/api/tests/tests.py
@@ -0,0 +1,55 @@
+import json
+from models import User, db
+from flask_jwt_extended import create_access_token
+from werkzeug.security import generate_password_hash
+
+def test_create_user(test_client):
+    """New user registration test"""
+    response = test_client.post(
+        "/users",
+        data=json.dumps({"username": "testuser", "email": "test@example.com", "password": "testpass", "role": "User"}),
+        content_type="application/json",
+    )
+    assert response.status_code == 201 # User should be created successfully
+    data = response.get_json()
+    assert data["username"] == "testuser"
+
+def test_login(test_client):
+    """User login test"""
+    hashed_pass = generate_password_hash("testpass")
+    user = User(username="testuser", email="test@example.com", password=hashed_pass, role="User")
+    db.session.add(user)
+    db.session.commit()
+
+    response = test_client.post(
+        "/login",
+        data=json.dumps({"username": "testuser", "password": "wrongpass"}),
+        content_type="application/json",
+    )
+    assert response.status_code == 401 # User should not be logged - wrong password
+    response = test_client.post(
+        "/login",
+        data=json.dumps({"username": "testuser", "password": "testpass"}),
+        content_type="application/json",
+    )
+    assert response.status_code == 200 # User should be logged - right password
+
+def test_get_users(test_client):
+    """Get all users test - JWT required"""
+    response = test_client.get("/users")
+    assert response.status_code == 401
+
+def test_get_user_with_token(test_client):
+    """Test to get user data after auth using JWT token"""
+    user = User(username="admin", email="admin@example.com", password="hashed_pass", role="Administrator")
+    print(user.id)
+    db.session.add(user)
+    db.session.commit()
+    
+    access_token = create_access_token(identity=str(user.id))
+    headers = {"Authorization": f"Bearer {access_token}"}
+
+    response = test_client.get(f"/users/{user.id}", headers=headers)
+    assert response.status_code == 200
+    data = response.get_json()
+    assert data["username"] == "admin"