diff --git a/.circleci/config.yml b/.circleci/config.yml
index 2b1fd3089..f8ee5a1ce 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -25,8 +25,19 @@ jobs:
             python -m pip install -r .circleci/requirements.txt
             pip install infisical
             pip install pytest
+            pip install mypy
             pip install openai[datalib]
             pip install -Uq chromadb==0.3.29
+
+      - run:
+          name: Linting Testing
+          command: |
+            cd litellm
+            if ! python -m mypy . --ignore-missing-imports; then
+              echo "mypy detected errors"
+              exit 1
+            fi
+            cd ..
   
 
       # Run pytest and generate JUnit XML report
@@ -83,11 +94,10 @@ workflows:
   version: 2
   build_and_test:
     jobs:
-      - local_testing
+      - linting
+      - local_testing:
+        requires:
+          - linting
       - publish_to_pypi:
           requires:
             - local_testing
-          filters:
-            branches:
-              only:
-                - main
diff --git a/litellm/tests/test_bad_params.py b/litellm/tests/test_bad_params.py
index a85613a50..71cbffe56 100644
--- a/litellm/tests/test_bad_params.py
+++ b/litellm/tests/test_bad_params.py
@@ -50,4 +50,4 @@ try:
 except:
     print(f"error occurred: {traceback.format_exc()}")
     pass
-os.environ["OPENAI_API_KEY"] = str(temp_key)
+os.environ["OPENAI_API_KEY"] = temp_key