diff --git a/tests/unit/encoders/test_mistral.py b/tests/unit/encoders/test_mistral.py
index f8b523381a06101c922855b313aace309188f8cd..f36f5037abaab256b03ab912714831b33a23fe2a 100644
--- a/tests/unit/encoders/test_mistral.py
+++ b/tests/unit/encoders/test_mistral.py
@@ -28,6 +28,7 @@ class TestMistralEncoder:
     def test_mistralai_encoder_init_success(self, mocker):
         encoder = MistralEncoder(mistralai_api_key="test_api_key")
         assert encoder._client is not None
+        assert encoder._mistralai is not None
 
     def test_mistralai_encoder_init_no_api_key(self, mocker):
         mocker.patch("os.getenv", return_value=None)
diff --git a/tests/unit/llms/test_llm_mistral.py b/tests/unit/llms/test_llm_mistral.py
index 420c98612ef0940bd7e9f6310e2f2ec1c14e4dfb..d73406e726c721242743f36e9de062b7460daaf0 100644
--- a/tests/unit/llms/test_llm_mistral.py
+++ b/tests/unit/llms/test_llm_mistral.py
@@ -3,6 +3,8 @@ import pytest
 from semantic_router.llms import MistralAILLM
 from semantic_router.schema import Message
 
+from unittest.mock import patch
+
 
 @pytest.fixture
 def mistralai_llm(mocker):
@@ -11,16 +13,16 @@ def mistralai_llm(mocker):
 
 
 class TestMistralAILLM:
-    # def test_mistral_llm_import_errors(self):
-    #     with patch.dict("sys.modules", {"mistralai": None}):
-    #         with pytest.raises(ImportError) as error:
-    #             MistralAILLM()
+    def test_mistral_llm_import_errors(self):
+        with patch.dict("sys.modules", {"mistralai": None}):
+            with pytest.raises(ImportError) as error:
+                MistralAILLM()
 
-    #     assert (
-    #         "Please install MistralAI to use MistralAI LLM. "
-    #         "You can install it with: "
-    #         "`pip install 'semantic-router[mistralai]'`" in str(error.value)
-    #     )
+        assert (
+            "Please install MistralAI to use MistralAI LLM. "
+            "You can install it with: "
+            "`pip install 'semantic-router[mistralai]'`" in str(error.value)
+        )
 
     def test_mistralai_llm_init_with_api_key(self, mistralai_llm):
         assert mistralai_llm._client is not None, "Client should be initialized"