diff --git a/.circleci/config.yml b/.circleci/config.yml
new file mode 100644
index 0000000..d58605b
--- /dev/null
+++ b/.circleci/config.yml
@@ -0,0 +1,184 @@
+jobs:
+  build_34:
+    machine: true
+    environment:
+      PYTHON: "3.4"
+      ENV_NAME: "py34-pygments-cache-test"
+    steps:
+      - checkout
+      - restore_cache:
+          keys:
+            - miniconda-v1-{{ checksum ".circleci/environment-3.4.yml" }}
+      - run:
+          name: install miniconda
+          command: |
+              if [ ! -d "/home/circleci/miniconda" ]; then
+                wget https://repo.continuum.io/miniconda/Miniconda3-latest-Linux-x86_64.sh -O miniconda.sh
+                bash miniconda.sh -b -p $HOME/miniconda
+                export PATH="$HOME/miniconda/bin:$PATH"
+                conda config --set always_yes yes --set changeps1 no
+              fi
+              sudo chown -R $USER.$USER $HOME
+      - run:
+          name: configure conda
+          command: |
+              export PATH="$HOME/miniconda/bin:$PATH"
+              if [ ! -d "/home/circleci/miniconda/envs/py34-pygments-cache-test" ]; then
+                conda update -q conda
+                conda env create -f .circleci/environment-${PYTHON}.yml --name=${ENV_NAME}
+                source activate ${ENV_NAME}
+              fi
+              conda env list
+              conda list ${ENV_NAME}
+      - save_cache:
+          key: miniconda-v1-{{ checksum ".circleci/environment-3.4.yml" }}
+          paths:
+            - "/home/circleci/miniconda"
+      - run:
+          command: |
+            export PATH="$HOME/miniconda/bin:$PATH"
+            source activate ${ENV_NAME}
+            python setup.py install
+      - run:
+          command: |
+            /home/circleci/miniconda/envs/py34-pygments-cache-test/bin/pytest
+  build_35:
+    machine: true
+    environment:
+      PYTHON: "3.5"
+      ENV_NAME: "py35-pygments-cache-test"
+    steps:
+      - checkout
+      - restore_cache:
+          keys:
+            - miniconda-v1-{{ checksum ".circleci/environment-3.5.yml" }}
+      - run:
+          name: install miniconda
+          command: |
+              if [ ! -d "/home/circleci/miniconda" ]; then
+                wget https://repo.continuum.io/miniconda/Miniconda3-latest-Linux-x86_64.sh -O miniconda.sh
+                bash miniconda.sh -b -p $HOME/miniconda
+                export PATH="$HOME/miniconda/bin:$PATH"
+                conda config --set always_yes yes --set changeps1 no
+              fi
+              sudo chown -R $USER.$USER $HOME
+      - run:
+          name: configure conda
+          command: |
+              export PATH="$HOME/miniconda/bin:$PATH"
+              export ENV_NAME="py35-pygments-cache-test"
+              if [ ! -d "/home/circleci/miniconda/envs/py35-pygments-cache-test" ]; then
+                conda update -q conda
+                conda env create -f .circleci/environment-${PYTHON}.yml --name=${ENV_NAME}
+                source activate ${ENV_NAME}
+              fi
+              conda env list
+              conda list ${ENV_NAME}
+      - save_cache:
+          key: miniconda-v1-{{ checksum ".circleci/environment-3.5.yml" }}
+          paths:
+            - "/home/circleci/miniconda"
+      - run:
+          command: |
+            export PATH="$HOME/miniconda/bin:$PATH"
+            source activate ${ENV_NAME}
+            python setup.py install
+      - run:
+          command: |
+            /home/circleci/miniconda/envs/py35-pygments-cache-test/bin/pytest
+  build_36:
+    machine: true
+    environment:
+      PYTHON: "3.6"
+      ENV_NAME: "py36-pygments-cache-test"
+    steps:
+      - checkout
+      - restore_cache:
+          keys:
+            - miniconda-v1-{{ checksum ".circleci/environment-3.6.yml" }}
+      - run:
+          name: install miniconda
+          command: |
+              if [ ! -d "/home/circleci/miniconda" ]; then
+                wget https://repo.continuum.io/miniconda/Miniconda3-latest-Linux-x86_64.sh -O miniconda.sh
+                bash miniconda.sh -b -p $HOME/miniconda
+                export PATH="$HOME/miniconda/bin:$PATH"
+                conda config --set always_yes yes --set changeps1 no
+              fi
+              sudo chown -R $USER.$USER $HOME
+      - run:
+          name: configure conda
+          command: |
+              export PATH="$HOME/miniconda/bin:$PATH"
+              export ENV_NAME="py36-pygments-cache-test"
+              if [ ! -d "/home/circleci/miniconda/envs/py36-pygments-cache-test" ]; then
+                conda update -q conda
+                conda env create -f .circleci/environment-${PYTHON}.yml --name=${ENV_NAME}
+                source activate ${ENV_NAME}
+              fi
+              conda env list
+              conda list ${ENV_NAME}
+      - save_cache:
+          key: miniconda-v1-{{ checksum ".circleci/environment-3.6.yml" }}
+          paths:
+            - "/home/circleci/miniconda"
+      - run:
+          command: |
+            export PATH="$HOME/miniconda/bin:$PATH"
+            source activate ${ENV_NAME}
+            python setup.py install
+      - run:
+          command: |
+            /home/circleci/miniconda/envs/py36-pygments-cache-test/bin/pytest
+  build_37:
+    machine: true
+    environment:
+      PYTHON: "3.7"
+      ENV_NAME: "py37-pygments-cache-test"
+    steps:
+      - checkout
+      - restore_cache:
+          keys:
+            - miniconda-v1-{{ checksum ".circleci/environment-3.7.yml" }}
+      - run:
+          name: install miniconda
+          command: |
+              if [ ! -d "/home/circleci/miniconda" ]; then
+                wget https://repo.continuum.io/miniconda/Miniconda3-latest-Linux-x86_64.sh -O miniconda.sh
+                bash miniconda.sh -b -p $HOME/miniconda
+                export PATH="$HOME/miniconda/bin:$PATH"
+                conda config --set always_yes yes --set changeps1 no
+              fi
+              sudo chown -R $USER.$USER $HOME
+      - run:
+          name: configure conda
+          command: |
+              export PATH="$HOME/miniconda/bin:$PATH"
+              export ENV_NAME="py37-pygments-cache-test"
+              if [ ! -d "/home/circleci/miniconda/envs/py37-pygments-cache-test" ]; then
+                conda update -q conda
+                conda env create -f .circleci/environment-${PYTHON}.yml --name=${ENV_NAME}
+                source activate ${ENV_NAME}
+              fi
+              conda env list
+              conda list ${ENV_NAME}
+      - save_cache:
+          key: miniconda-v1-{{ checksum ".circleci/environment-3.7.yml" }}
+          paths:
+            - "/home/circleci/miniconda"
+      - run:
+          command: |
+            export PATH="$HOME/miniconda/bin:$PATH"
+            source activate ${ENV_NAME}
+            python setup.py install
+      - run:
+          command: |
+            /home/circleci/miniconda/envs/py37-pygments-cache-test/bin/pytest
+workflows:
+  version: 2
+  run_all_pythons:
+    jobs:
+      - build_34
+      - build_35
+      - build_36
+      - build_37
diff --git a/.circleci/environment-3.4.yml b/.circleci/environment-3.4.yml
new file mode 100644
index 0000000..ae34199
--- /dev/null
+++ b/.circleci/environment-3.4.yml
@@ -0,0 +1,8 @@
+name: py34-pygments-cache-test
+channels:
+  - conda-forge
+  - defaults
+dependencies:
+  - python=3.4
+  - pygments
+  - pytest
diff --git a/.circleci/environment-3.5.yml b/.circleci/environment-3.5.yml
new file mode 100644
index 0000000..b95aa03
--- /dev/null
+++ b/.circleci/environment-3.5.yml
@@ -0,0 +1,8 @@
+name: py35-pygments-cache-test
+channels:
+  - conda-forge
+  - defaults
+dependencies:
+  - python=3.5
+  - pygments
+  - pytest
diff --git a/.circleci/environment-3.6.yml b/.circleci/environment-3.6.yml
new file mode 100644
index 0000000..911dd8a
--- /dev/null
+++ b/.circleci/environment-3.6.yml
@@ -0,0 +1,8 @@
+name: py36-pygments-cache-test
+channels:
+  - conda-forge
+  - defaults
+dependencies:
+  - python=3.6
+  - pygments
+  - pytest
diff --git a/.circleci/environment-3.7.yml b/.circleci/environment-3.7.yml
new file mode 100644
index 0000000..e2cd289
--- /dev/null
+++ b/.circleci/environment-3.7.yml
@@ -0,0 +1,8 @@
+name: py37-pygments-cache-test
+channels:
+  - conda-forge
+  - defaults
+dependencies:
+  - python=3.7
+  - pygments
+  - pytest