diff --git a/.circleci/config.yml b/.circleci/config.yml
new file mode 100644
index 0000000..ef21325
--- /dev/null
+++ b/.circleci/config.yml
@@ -0,0 +1,22 @@
+version: 2
+jobs:
+  build:
+    working_directory: ~/noiseprotocol
+    docker:
+      - image: circleci/python:3.6.4
+    steps:
+      - checkout
+      - run: sudo chown -R circleci:circleci /usr/local/bin
+      - run: sudo chown -R circleci:circleci /usr/local/lib/python3.6/site-packages
+      - run:
+          command: |
+            sudo pip install -r requirements.txt
+            sudo pip install -r dev_requirements.txt
+      - run:
+          command: |
+            mkdir test-reports
+            pytest --junitxml=test-reports/junit.xml
+      - store_test_results:
+          path: test-results
+      - store_artifacts:
+          path: test-results
\ No newline at end of file
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100755
index 3dc1068..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,55 +0,0 @@
-language: python
-  
-python:
-  - "3.5"
-  - "3.6"
-  - "3.5-dev" # 3.5 development branch
-  - "3.6-dev" # 3.6 development branch
-
-matrix:
-  fast_finish: true
-  allow_failures:
-    - os: osx  # Travis is SO slow with OS X.
-  include:
-    - os: osx
-      language: generic
-      env: PYTHON=3.5.4
-    - os: osx
-      language: generic
-      env: PYTHON=3.6.3
-      
-notifications:
-  email: false
-
-# From https://pythonhosted.org/CodeChat/.travis.yml.html
-before_install: |
-  if [ "$TRAVIS_OS_NAME" == "osx" ]; then
-    brew update
-    # Per the `pyenv homebrew recommendations <https://github.com/yyuu/pyenv/wiki#suggested-build-environment>`_.
-    brew install openssl readline
-    # See https://docs.travis-ci.com/user/osx-ci-environment/#A-note-on-upgrading-packages.
-    # I didn't do this above because it works and I'm lazy.
-    brew outdated pyenv || brew upgrade pyenv
-    # virtualenv doesn't work without pyenv knowledge. venv in Python 3.3
-    # doesn't provide Pip by default. So, use `pyenv-virtualenv <https://github.com/yyuu/pyenv-virtualenv/blob/master/README.md>`_.
-    brew install pyenv-virtualenv
-    pyenv install $PYTHON
-    # I would expect something like ``pyenv init; pyenv local $PYTHON`` or
-    # ``pyenv shell $PYTHON`` would work, but ``pyenv init`` doesn't seem to
-    # modify the Bash environment. ??? So, I hand-set the variables instead.
-    export PYENV_VERSION=$PYTHON
-    export PATH="/Users/travis/.pyenv/shims:${PATH}"
-    pyenv-virtualenv venv
-    source venv/bin/activate
-    # A manual check that the correct version of Python is running.
-    python --version
-  fi
-
-# command to install dependencies
-install:
-  - "pip install -r requirements.txt"
-  - "pip install pytest-travis-fold"
-  
-# command to run tests
-script:
-  - "python -m pytest"
diff --git a/appveyor.yml b/appveyor.yml
deleted file mode 100755
index 01ea965..0000000
--- a/appveyor.yml
+++ /dev/null
@@ -1,22 +0,0 @@
-environment:
-  matrix:
-    - PYTHON: "C:\\Python35"
-    - PYTHON: "C:\\Python36"
-    - PYTHON: "C:\\Python35-x64"
-    - PYTHON: "C:\\Python36-x64"
-
-install:
-  - "%PYTHON%\\python.exe -m pip install -r requirements.txt"
-  - "%PYTHON%\\python.exe -m pip install pytest wheel"
-
-build: off
-
-test_script:
-  - "%PYTHON%\\python.exe -m pytest"
-
-after_test:
-  - "%PYTHON%\\python.exe setup.py bdist_wheel"
-
-artifacts:
-  # bdist_wheel puts your built wheel in the dist directory
-  - path: dist\*