diff --git a/.circleci/config.yml b/.circleci/config.yml
new file mode 100644
index 0000000..c32440d
--- /dev/null
+++ b/.circleci/config.yml
@@ -0,0 +1,59 @@
+version: 2
+workflows:
+  version: 2
+  main:
+    jobs:
+      - build
+  nightly:
+    triggers:
+      - schedule:
+          cron: "0 0 * * *"
+          filters:
+            branches:
+              only:
+                - master
+    jobs:
+      - build
+jobs:
+  build:
+    working_directory: ~/pantheon-systems/pantheon-hud
+    parallelism: 1
+    docker:
+    - image: circleci/php:7.1
+    steps:
+    - checkout
+    - run: echo $(openssl rand -hex 8) > /tmp/WORDPRESS_ADMIN_PASSWORD
+    - run: |
+        echo 'export PATH=/tmp/terminus/bin:$PATH' >> $BASH_ENV
+        echo 'export TERMINUS_ENV=ci-$CIRCLE_BUILD_NUM' >> $BASH_ENV
+        echo 'export TERMINUS_SITE=pantheon-hud' >> $BASH_ENV
+        echo 'export SITE_ENV=pantheon-hud.ci-$CIRCLE_BUILD_NUM' >> $BASH_ENV
+        echo 'export WORDPRESS_ADMIN_USERNAME=pantheon' >> $BASH_ENV
+        echo 'export WORDPRESS_ADMIN_EMAIL=no-reply@getpantheon.com' >> $BASH_ENV
+        echo 'export WORDPRESS_ADMIN_PASSWORD=$(cat /tmp/WORDPRESS_ADMIN_PASSWORD)' >> $BASH_ENV
+        source $BASH_ENV
+    - run: echo "StrictHostKeyChecking no" >> "$HOME/.ssh/config"
+    - run: |
+        sudo apt-get update
+        sudo apt-get install -y rsync
+    - run: |
+        if [ -z "$GITHUB_TOKEN" ]; then
+          echo "GITHUB_TOKEN environment variables missing; assuming unauthenticated build"
+          exit 0
+        fi
+        echo "Setting GitHub OAuth token with suppressed ouput"
+        {
+          composer config -g github-oauth.github.com $GITHUB_TOKEN
+        } &> /dev/null
+    - run: |
+        if [ -z "$TERMINUS_TOKEN" ]; then
+          echo "TERMINUS_TOKEN environment variables missing; assuming unauthenticated build"
+          exit 0
+        fi
+        composer install
+        git clone --branch master https://github.com/pantheon-systems/terminus.git /tmp/terminus
+        cd /tmp/terminus && composer install
+        terminus auth:login --machine-token=$TERMINUS_TOKEN
+    - run: ./bin/behat-prepare.sh
+    - run: ./bin/behat-test.sh --strict
+    - run: ./bin/behat-cleanup.sh
diff --git a/behat.yml b/behat.yml
new file mode 100644
index 0000000..6f66839
--- /dev/null
+++ b/behat.yml
@@ -0,0 +1,22 @@
+# behat.yml
+default:
+  suites:
+    default:
+      paths:
+        - tests/behat
+      contexts:
+        - Behat\MinkExtension\Context\MinkContext
+        - PantheonSystems\PantheonWordPressUpstreamTests\Behat\AdminLogIn
+    core:
+      filters:
+        tags: "~@upstreamonly"
+      paths:
+        - vendor/pantheon-systems/pantheon-wordpress-upstream-tests/features
+      contexts:
+        - Behat\MinkExtension\Context\MinkContext
+        - PantheonSystems\PantheonWordPressUpstreamTests\Behat\AdminLogIn
+        - PantheonSystems\PantheonWordPressUpstreamTests\Behat\ResponseHeader
+  extensions:
+    Behat\MinkExtension:
+      # base_url set by ENV
+      goutte: ~
diff --git a/bin/behat-cleanup.sh b/bin/behat-cleanup.sh
new file mode 100755
index 0000000..99f6d8e
--- /dev/null
+++ b/bin/behat-cleanup.sh
@@ -0,0 +1,23 @@
+#!/bin/bash
+
+###
+# Delete the Pantheon site environment after the Behat test suite has run.
+###
+
+terminus whoami > /dev/null
+if [ $? -ne 0 ]; then
+	echo "Terminus unauthenticated; assuming unauthenticated build"
+	exit 0
+fi
+
+set -ex
+
+if [ -z "$TERMINUS_SITE" ] || [ -z "$TERMINUS_ENV" ]; then
+	echo "TERMINUS_SITE and TERMINUS_ENV environment variables must be set"
+	exit 1
+fi
+
+###
+# Delete the environment used for this test run.
+###
+terminus multidev:delete $SITE_ENV --delete-branch --yes
diff --git a/bin/behat-prepare.sh b/bin/behat-prepare.sh
new file mode 100755
index 0000000..e3363e2
--- /dev/null
+++ b/bin/behat-prepare.sh
@@ -0,0 +1,82 @@
+#!/bin/bash
+
+###
+# Prepare a Pantheon site environment for the Behat test suite, by installing
+# and configuring the plugin for the environment. This script is architected
+# such that it can be run a second time if a step fails.
+###
+
+terminus whoami > /dev/null
+if [ $? -ne 0 ]; then
+	echo "Terminus unauthenticated; assuming unauthenticated build"
+	exit 0
+fi
+
+if [ -z "$TERMINUS_SITE" ] || [ -z "$TERMINUS_ENV" ]; then
+	echo "TERMINUS_SITE and TERMINUS_ENV environment variables must be set"
+	exit 1
+fi
+
+if [ -z "$WORDPRESS_ADMIN_USERNAME" ] || [ -z "$WORDPRESS_ADMIN_PASSWORD" ]; then
+	echo "WORDPRESS_ADMIN_USERNAME and WORDPRESS_ADMIN_PASSWORD environment variables must be set"
+	exit 1
+fi
+
+set -ex
+
+###
+# Create a new environment for this particular test run.
+###
+terminus env:create  $TERMINUS_SITE.dev $TERMINUS_ENV
+terminus env:wipe $SITE_ENV --yes
+
+###
+# Get all necessary environment details.
+###
+PANTHEON_GIT_URL=$(terminus connection:info $SITE_ENV --field=git_url)
+PANTHEON_SITE_URL="$TERMINUS_ENV-$TERMINUS_SITE.pantheonsite.io"
+PREPARE_DIR="/tmp/$TERMINUS_ENV-$TERMINUS_SITE"
+BASH_DIR="$( cd -P "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+
+###
+# Switch to git mode for pushing the files up
+###
+terminus connection:set $SITE_ENV git
+rm -rf $PREPARE_DIR
+git clone -b $TERMINUS_ENV $PANTHEON_GIT_URL $PREPARE_DIR
+
+###
+# Add the copy of this plugin itself to the environment
+###
+rm -rf $PREPARE_DIR/wp-content/plugins/pantheon-hud
+cd $BASH_DIR/..
+rsync -av --exclude='vendor/' --exclude='node_modules/' --exclude='tests/' ./* $PREPARE_DIR/wp-content/plugins/pantheon-hud
+rm -rf $PREPARE_DIR/wp-content/plugins/pantheon-hud/.git
+
+# Download the latest Classic Editor release from WordPress.org
+wget -O $PREPARE_DIR/classic-editor.zip https://downloads.wordpress.org/plugin/classic-editor.zip
+unzip $PREPARE_DIR/classic-editor.zip -d $PREPARE_DIR
+mv $PREPARE_DIR/classic-editor $PREPARE_DIR/wp-content/plugins/
+rm $PREPARE_DIR/classic-editor.zip
+
+###
+# Push files to the environment
+###
+cd $PREPARE_DIR
+git add wp-content
+git config user.email "pantheon-hud@getpantheon.com"
+git config user.name "Pantheon"
+git commit -m "Include Pantheon HUD and its configuration files"
+git push
+
+###
+# Set up WordPress, theme, and plugins for the test run
+###
+# Silence output so as not to show the password.
+{
+  terminus wp $SITE_ENV -- core install --title=$TERMINUS_ENV-$TERMINUS_SITE --url=$PANTHEON_SITE_URL --admin_user=$WORDPRESS_ADMIN_USERNAME --admin_email=pantheon-hud@getpantheon.com --admin_password=$WORDPRESS_ADMIN_PASSWORD
+} &> /dev/null
+terminus wp $SITE_ENV -- cache flush
+terminus wp $SITE_ENV -- plugin activate pantheon-hud classic-editor
+terminus wp $SITE_ENV -- theme activate twentyseventeen
+terminus wp $SITE_ENV -- rewrite structure '/%year%/%monthnum%/%day%/%postname%/'
diff --git a/bin/behat-test.sh b/bin/behat-test.sh
new file mode 100755
index 0000000..eaf7dad
--- /dev/null
+++ b/bin/behat-test.sh
@@ -0,0 +1,27 @@
+#!/bin/bash
+
+###
+# Execute the Behat test suite against a prepared Pantheon site environment.
+###
+
+terminus whoami > /dev/null
+if [ $? -ne 0 ]; then
+	echo "Terminus unauthenticated; assuming unauthenticated build"
+	exit 0
+fi
+
+if [ -z "$TERMINUS_SITE" ] || [ -z "$TERMINUS_ENV" ]; then
+	echo "TERMINUS_SITE and TERMINUS_ENV environment variables must be set"
+	exit 1
+fi
+
+if [ -z "$WORDPRESS_ADMIN_USERNAME" ] || [ -z "$WORDPRESS_ADMIN_PASSWORD" ]; then
+	echo "WORDPRESS_ADMIN_USERNAME and WORDPRESS_ADMIN_PASSWORD environment variables must be set"
+	exit 1
+fi
+
+set -ex
+
+export BEHAT_PARAMS='{"extensions" : {"Behat\\MinkExtension" : {"base_url" : "http://'$TERMINUS_ENV'-'$TERMINUS_SITE'.pantheonsite.io"} }}'
+
+./vendor/bin/behat "$@"
diff --git a/tests/behat/pantheon-hud.feature b/tests/behat/pantheon-hud.feature
new file mode 100644
index 0000000..0bcf972
--- /dev/null
+++ b/tests/behat/pantheon-hud.feature
@@ -0,0 +1,11 @@
+Feature: Solr Power plugin
+
+  Background:
+    Given I log in as an admin
+
+  Scenario: Plugin is loaded
+    When I go to "/wp-admin/"
+    Then the "#wp-admin-bar-pantheon-hud" element should contain "pantheon-hud.pantheonsite.io"
+    And the "#wp-admin-bar-pantheon-hud" element should contain "1 app container running PHP"
+    And the "#wp-admin-bar-pantheon-hud" element should contain "1 db container with replication disabled"
+    And the "#wp-admin-bar-pantheon-hud" element should contain "Visit Pantheon Dashboard"