Patch tokenizer in the unit tests

tests/unit/test_cli.py

@@ -1,5 +1,5 @@
 """
-Unit tests for the cli module.
+Unit tests for the CLI of SlideDeck AI.
 """
 import argparse
 import sys
@@ -8,16 +8,20 @@ from unittest.mock import patch, MagicMock
 
 import pytest
 
-from slidedeckai.cli import (
-    group_models_by_provider,
-    format_models_as_bullets,
-    CustomArgumentParser,
-    CustomHelpFormatter,
-    format_models_list,
-    format_model_help,
-    main
-)
-from slidedeckai.global_config import GlobalConfig
+# Apply BertTokenizer patch before importing anything that might use it
+from .test_utils import patch_bert_tokenizer
+
+with patch('transformers.BertTokenizer', patch_bert_tokenizer()):
+    from slidedeckai.cli import (
+        group_models_by_provider,
+        format_models_as_bullets,
+        CustomArgumentParser,
+        CustomHelpFormatter,
+        format_models_list,
+        format_model_help,
+        main
+    )
+    from slidedeckai.global_config import GlobalConfig
 
 
 def test_group_models_by_provider():

tests/unit/test_core.py

@@ -1,13 +1,23 @@
 """
-Unit tests for the core module.
+Unit tests for the core module of SlideDeck AI.
 """
 import os
 from pathlib import Path
 from unittest import mock
+from unittest.mock import patch
+
 import pytest
 
-from slidedeckai.core import SlideDeckAI, _process_llm_chunk, _stream_llm_response
-from .test_utils import get_mock_llm, get_mock_llm_response, MockStreamResponse
+# Apply BertTokenizer patch before importing anything that might use it
+from .test_utils import (
+    get_mock_llm,
+    get_mock_llm_response,
+    MockStreamResponse,
+    patch_bert_tokenizer
+)
+
+with patch('transformers.BertTokenizer', patch_bert_tokenizer()):
+    from slidedeckai.core import SlideDeckAI, _process_llm_chunk, _stream_llm_response
 
 
 @pytest.fixture