diff --git a/.circleci/config.yml b/.circleci/config.yml
index 0ff18bb..4053c63 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -12,11 +12,11 @@ jobs:
       - run:
           name: install dependencies
           command: |
-            sudo pip install tox
+            pip install -r requirements.txt
       - run:
           name: run tests
           command: |
-            tox -e py37
+            pytest
       - store_artifacts:
           path: test-reports
           destination: test-reports
diff --git a/README.md b/README.md
index e2b3f6f..bb3f65a 100644
--- a/README.md
+++ b/README.md
@@ -39,7 +39,7 @@ Testing
 
 Run all tests
 
-    tox
+    pytest
 
 
 API
diff --git a/requirements.txt b/requirements.txt
index 053c4e4..5075893 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,4 @@
 # Dev/test/deploy
-tox>=3.24.0
 IPython
 pytest
 websocket-client>=1.1.1
diff --git a/tox.ini b/tox.ini
deleted file mode 100644
index d5dcffa..0000000
--- a/tox.ini
+++ /dev/null
@@ -1,7 +0,0 @@
-[tox]
-envlist = python3.5,python3.6,python3.7
-
-[testenv]
-deps=pytest
-     websocket-client
-commands=pytest