diff --git a/api/tests/test_tasks.py b/api/tests/test_tasks.py
index 763139d..e3bcdd4 100644
--- a/api/tests/test_tasks.py
+++ b/api/tests/test_tasks.py
@@ -1,6 +1,4 @@
-from datetime import datetime
 import json
-from models import db
 from flask_jwt_extended import create_access_token
 
 def test_create_task(test_client, test_user):
@@ -14,9 +12,9 @@ def test_create_task(test_client, test_user):
         headers=headers,
         content_type="application/json",
     )
-    assert response.status_code == 200  # Create task should be successful
+    assert response.status_code == 200, "Logged user should can create task"
     data = response.get_json()
-    assert data["title"] == "Test Task"
+    assert data["title"] == "Test Task", "API should return created task data"
 
 def test_get_tasks(test_client, test_user, new_task):
     """User task get test"""
@@ -24,7 +22,7 @@ def test_get_tasks(test_client, test_user, new_task):
     headers = {"Authorization": f"Bearer {access_token}"}
 
     response = test_client.get(f"/tasks/user/{test_user.id}", headers=headers)
-    assert response.status_code == 200
+    assert response.status_code == 200, "Logged user should can get your own tasks data"
     data = response.get_json()
     assert len(data) == 1
-    assert data[0]["title"] == "Test Task"
+    assert data[0]["title"] == "Test Task", "API should return only tasks belongs to specific user"
diff --git a/api/tests/test_users.py b/api/tests/test_users.py
index 231ee9f..d072d6c 100644
--- a/api/tests/test_users.py
+++ b/api/tests/test_users.py
@@ -7,24 +7,24 @@ def test_create_user(test_client, test_user, test_admin):
     # Anonymous try to create common user
     test_user_data = {"username": "test", "email": "testemail@example.com", "password": "testpassword", "role": "User"}
     response = test_client.post("/users", data=json.dumps(test_user_data), content_type="application/json")
-    assert response.status_code == 201 # User should be created successfully
+    assert response.status_code == 201, "Each should can register in the service"
     data = response.get_json()
     assert data["username"] == "test"
 
     # Anonymous try to create admin user
     admin_user_data = {"username": "testadmin", "email": "testadmin@example.com", "password": "adminpass", "role": "Administrator"}
     response = test_client.post("/users", data=json.dumps(admin_user_data), content_type="application/json")
-    assert response.status_code == 401 # Anonymous cannot create admin users
+    assert response.status_code == 401, "Anonymous should cannot create admin users"
 
     # Login common user and try to create admin user
     headers = login_test_user(test_user.id)
     response = test_client.post("/users", data=json.dumps(admin_user_data), content_type="application/json", headers=headers)
-    assert response.status_code == 403 # Common user cannot create admin users
+    assert response.status_code == 403, "Common user should cannot create admin users"
 
     # Try to create admin user using admin account
     headers = login_test_user(test_admin.id)
     response = test_client.post("/users", data=json.dumps(admin_user_data), content_type="application/json", headers=headers)
-    assert response.status_code == 201 # Logged administrators can create new admin users
+    assert response.status_code == 201, "Logged administrators should can create new admin users"
 
 def test_edit_user(test_client, test_user, test_admin):
     "User edit test"
@@ -39,39 +39,39 @@ def test_edit_user(test_client, test_user, test_admin):
 
     # Check if PUT request contains all editable fields
     response = test_client.put(f"/users/{test_user.id}", data=json.dumps({"username": test_user.username, "password": "testpass"}), headers=user_headers)
-    assert response.status_code == 400 # PUT must have all editable fields
+    assert response.status_code == 400, "PUT request data must have all editable fields"
 
     # Check if user can edit their own data
     response = test_client.patch(f"/users/{test_user.id}", data=json.dumps({"username": test_user.username, "password": "testpass"}), headers=user_headers)
-    assert response.status_code == 200
+    assert response.status_code == 200, "Common user should can edit own account data"
 
     # Check if user cannot edit other user data
     response = test_client.patch(f"/users/{test_admin.id}", data=json.dumps({"username": admin_data["username"], "password": "adminpass"}), headers=user_headers)
-    assert response.status_code == 403
+    assert response.status_code == 403, "Common user should cannot edit other user data"
 
     # Check if admin can edit other user data
     response = test_client.patch(f"/users/{test_user.id}", data=json.dumps({"username": test_user.username, "password": "testpass"}), headers=admin_headers)
-    assert response.status_code == 200
+    assert response.status_code == 200, "Admin user should can edit other user data"
 
 def test_remove_user(test_client, test_user, test_user2, test_admin):
     "User remove test"
     # Anonymous try to remove user
     response = test_client.delete(f"/users/{test_user.id}")
-    assert response.status_code == 401 # Anonymous cannot remove user account
+    assert response.status_code == 401, "Anonymous should cannot remove user account"
 
     # Logged user try to remove other user account
     headers = login_test_user(test_user.id)
     response = test_client.delete(f"/users/{test_admin.id}", headers=headers)
-    assert response.status_code == 403 # Common user cannot remove other user account
+    assert response.status_code == 403, "Common user should cannot remove other user account"
 
     # Logged user try to remove own account
     response = test_client.delete(f"/users/{test_user.id}", headers=headers)
-    assert response.status_code == 200 # Common user can remove their own account
+    assert response.status_code == 200, "Common user should can remove their own account"
 
     # Logged admin can remove other user account
     admin_headers = login_test_user(test_admin.id)
     response = test_client.delete(f"/users/{test_user2.id}", headers=admin_headers)
-    assert response.status_code == 200 # Admin user can remove other user account
+    assert response.status_code == 200, "Admin user should can remove other user account"
 
 def test_login(test_client, test_user):
     """User login test"""
@@ -81,33 +81,33 @@ def test_login(test_client, test_user):
         data=json.dumps({"username": "testuser", "password": "wrongpass"}),
         content_type="application/json",
     )
-    assert response.status_code == 401 # User should not be logged - wrong password
+    assert response.status_code == 401, "User should not become logged if provided 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
+    assert response.status_code == 200, "User should become logged if provided right password"
 
 def test_get_users(test_client, test_user, test_admin):
     """Get all users test"""
     response = test_client.get("/users")
-    assert response.status_code == 401 # Anonymous cannot get all users data
+    assert response.status_code == 401, "Anonymous should cannot get all users data"
     
     # Common user try to get all users data
     headers = login_test_user(test_user.id)
     response = test_client.get("/users", headers=headers)
-    assert response.status_code == 403 # Common user cannot get all users data
+    assert response.status_code == 403, "Common user should cannot get all users data"
     
     # Admin user try to get all users data
     headers = login_test_user(test_admin.id)
     response = test_client.get("/users", headers=headers)
-    assert response.status_code == 200 # Admin user should be able to get all users data
+    assert response.status_code == 200, "Admin user should be able to get all users data"
 
 def test_get_user_with_token(test_client, test_user, test_admin):
     """Test to get user data before and after auth using JWT token"""
     response = test_client.get(f"/users/{test_admin.id}")
-    assert response.status_code == 401 # Try to get user data without login
+    assert response.status_code == 401, "Anonymous should cannot get user data without login"
 
     admin_headers = login_test_user(test_admin.id)
     response = test_client.get(f"/users/{test_admin.id}", headers=admin_headers)
@@ -117,16 +117,16 @@ def test_get_user_with_token(test_client, test_user, test_admin):
 
     headers = login_test_user(test_user.id)
     response = test_client.get(f"/users/{test_user.id}", headers=headers)
-    assert response.status_code == 200 # Common user can get own user data
+    assert response.status_code == 200, "Common user should can get own user data"
     response = test_client.get(f"/users/{test_admin.id}", headers=headers)
-    assert response.status_code == 403 # Common user cannot get other user data
+    assert response.status_code == 403, "Common user should cannot get other user data"
     response = test_client.get(f"/users/{test_user.id}", headers=admin_headers)
-    assert response.status_code == 200 # Admin can access all user data
+    assert response.status_code == 200, "Admin should can access all user data"
 
 def test_user_logout(test_client, test_user):
     """Test if logout works and JWT token is revoked"""
     headers = login_test_user(test_user.id)
     response = test_client.get(f"/logout", headers=headers)
-    assert response.status_code == 200 # Logged user can logout
+    assert response.status_code == 200, "Logged user should can logout"
     response = test_client.get(f"/logout", headers=headers)
-    assert response.status_code == 401 # Token should be revoked after logout
+    assert response.status_code == 401, "Token should be revoked after logout"