diff --git a/openiziai/fine_tuning.py b/openiziai/fine_tuning.py
index b831012..ef807f5 100644
--- a/openiziai/fine_tuning.py
+++ b/openiziai/fine_tuning.py
@@ -105,7 +105,6 @@ def status(self) -> Optional[str]:
 
         return self._job_status.name
 
-    # TODO: Consertar mocks para testar a propriedade
     @property
     def model(self) -> Optional[GPTModel]:
         if self._model:
diff --git a/tests/test_fine_tuning.py b/tests/test_fine_tuning.py
index 3bde3a9..b577e61 100644
--- a/tests/test_fine_tuning.py
+++ b/tests/test_fine_tuning.py
@@ -2,6 +2,7 @@
 from unittest.mock import MagicMock, mock_open, patch
 
 import pytest
+from openai import OpenAI
 from pydantic import ValidationError
 
 from openiziai.fine_tuning import FineTuning
@@ -81,3 +82,41 @@ def test_retrieve_fine_tuned_model(fine_tuning, valid_task):
         assert fine_tuning.model.task == valid_task
         assert fine_tuning.model.base_model == 'gpt-3.5-turbo'
         assert fine_tuning.model.created_at
+
+
+def test_start_fine_tuning_without_uploaded_file(fine_tuning):
+    assert not fine_tuning.start()
+
+
+def test_retrieve_status_without_job(fine_tuning):
+    assert not fine_tuning.status
+
+
+def test_retrieve_model_without_completed_job(valid_task):
+    mock_path = MagicMock(spec=Path)
+    mock_path.stat.return_value.st_size = 100000
+    client = MagicMock(spec=OpenAI)
+    files_mock = MagicMock(
+        create=MagicMock(return_value=MagicMock(id='file-id'))
+    )
+    fine_tuning_mock = MagicMock(
+        jobs=MagicMock(
+            create=MagicMock(return_value=MagicMock(id='job-id')),
+            retrieve=MagicMock(
+                return_value=MagicMock(status='failed', fine_tuned_model=None)
+            ),
+        )
+    )
+
+    client.files = files_mock
+    client.fine_tuning = fine_tuning_mock
+
+    fine_tuning = FineTuning(
+        client=client, train_file=mock_path, task=valid_task
+    )
+
+    with patch('builtins.open', mock_open(read_data='data')):
+        fine_tuning.upload_file_to_openai().start()
+
+        assert fine_tuning.status == 'FAILED'
+        assert not fine_tuning.model