diff --git a/.circleci/config.yml b/.circleci/config.yml
new file mode 100644
index 00000000..f2157f49
--- /dev/null
+++ b/.circleci/config.yml
@@ -0,0 +1,22 @@
+version: 2.1
+
+# -------------------------------------------------------------------------------------
+# Commands
+# -------------------------------------------------------------------------------------
+
+commands:
+
+  py_3_7_setup:
+    description: "Install and switch to Python 3.7.5; also install pip and pytest."
+    steps:
+      - run:
+          name: "Setup Python v3.7.5 environment"
+          command: |
+            cd /opt/circleci/.pyenv && git pull && cd -
+            pyenv install -s 3.7.5
+            pyenv global 3.7.5
+            pyenv local 3.7.5
+            pyenv versions
+            echo "In venv: $(pyenv local) - $(python -V), $(pip -V)"
+            sudo "$(which python)" -m pip install --upgrade pip
+            sudo "$(which python)" -m pip install pytest