diff --git a/.gitignore b/.gitignore
index f15f427..c1aaee5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,9 +3,6 @@
 *.pyd
 *.egg-info/
 __pycache__/
-.*/
+.*
 dist/
 build/
-
-# test artifacts
-.env.yml
diff --git a/README.rst b/README.rst
index 0115ac1..a0c939f 100644
--- a/README.rst
+++ b/README.rst
@@ -43,7 +43,7 @@ Installation
 ============
 
 The ``molecule-proxmox`` plugin may be installed with Python ``pip``. A virtualenv
-is recommended.  The following commands install Anisble, Molecule, and the
+is recommended.  The following commands install Ansible, Molecule, and the
 Molecule Proxmox plugin in a virtualenv called ``venv``.
 
 .. code-block:: bash
@@ -107,6 +107,42 @@ Example
      - name: test02
        template_vmid: 9000
 
+Development
+===========
+
+To checkout the source code:
+
+    $ git clone https://github.com/meffie/molecule-proxmox
+    $ cd molecule-proxmox
+
+A `Makefile` is provided to facilitate development and testing. A Python
+virtualenv environment may be created with the `init` target.
+
+    $ make init
+    $ source .venv/bin/activate
+
+Export the following shell environment variables to run the unit tests.
+
+    export PROXMOX_SECRETS=<proxmox secrets yaml file path>
+    export PROXMOX_NODE=<proxmox node name>
+    export PROXMOX_SSH_USER=<username>
+    export PROXMOX_SSH_IDENTITY_FILE=<ssh key file for username>
+
+The secrets file should contain the proxmox login credentials, either the
+username and password, or a Proxmox API token id and value.  This file should
+be encrypted with `ansible-vault`. The ssh user and identity file should match
+the user and public key installed when the virtual machine template was
+created.
+
+To run the unit tests in verbose mode:
+
+    $ make test
+
+To run the unit tests in quiet mode:
+
+    $ make check
+
+
 Authors
 =======
 
diff --git a/tests/proxmox_driver/molecule/default/molecule.yml b/tests/proxmox_driver/molecule/default/molecule.yml
index 599275d..17ccfdb 100644
--- a/tests/proxmox_driver/molecule/default/molecule.yml
+++ b/tests/proxmox_driver/molecule/default/molecule.yml
@@ -5,25 +5,23 @@ driver:
   name: proxmox
   options:
     # Creds file path. May be encrypted with ansible-vault.
-    proxmox_secrets: "${HOME}/proxmox_secrets.yml"
+    proxmox_secrets: "${PROXMOX_SECRETS}"
     #api_host: "*********"
     #api_user: "*********"
     #api_password: "********"
     #api_token_id: "********"
     #api_token_secret: "*******************************"
-    node: "morty"
-    ssh_user: "molecule"
-    ssh_identity_file: "${HOME}/.ssh/id_rsa"
+    node: "${PROXMOX_NODE}"
+    ssh_user: "${PROXMOX_SSH_USER}"
+    ssh_identity_file: "${PROXMOX_SSH_IDENTITY_FILE}"
     clone_delay: 2
-    box2vmid:
-      "generic/alma8": 9000
 
 platforms:
   - name: m01
     template_vmid: 9000
-  - name: m02
-    template_vmid: 9000
-  - name: m03
-    box: generic/alma8
+  #- name: m02
+  #  template_vmid: 9000
+  #- name: m03
+  #  box: generic/alma8
 provisioner:
   name: ansible