diff --git a/.circleci/config.yml b/.circleci/config.yml
index 550eb8c..07908dc 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -29,7 +29,7 @@ jobs:
       - run:
           name: run unit tests
           command: |
-            py.test -n 4 tests/
+            py.test tests/
 
         # Run full installer test
       - setup_remote_docker
diff --git a/dev-requirements.txt b/dev-requirements.txt
index 9cda381..e079f8a 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -1,2 +1 @@
 pytest
-pytest-xdist