diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
new file mode 100644
index 0000000..41e67b9
--- /dev/null
+++ b/.github/workflows/tests.yml
@@ -0,0 +1,91 @@
+name: WordPress PHPUnit tests
+
+on:
+  # The workflow should be run on a schedule using the 'schedule' event trigger.
+  #
+  # For more details on how to configure the schedule event, see https://docs.github.com/en/actions/reference/workflow-syntax-for-github-actions#onschedule.
+  #
+  # Below are some options for different schedules. Running the tests every hour is recommended,
+  # but every 3-6 hours is also helpful. Times are in UTC.
+   schedule:
+     # By default, the workflow will run every hour.
+     - cron:  '0 * * * *'
+     # Every 3 hours.
+     # - cron:  '0 0/3 * * *'
+     # Every 6 hours.
+     # - cron:  '0 0/6 * * *'
+     # Every 12 hours.
+     # - cron:  '0 0/12 * * *'
+     # Once per day at 00:00.
+     # - cron:  '0 0 * * *'
+     # Every 30 minutes.
+     # - cron:  '0/30 * * * *'
+
+# Cancels all previous workflow runs for pull requests that have not completed.
+concurrency:
+  # The concurrency group contains the workflow name and the branch name for pull requests
+  # or the commit hash for any other events.
+  group: ${{ github.workflow }}-${{ github.event_name == 'pull_request' && github.head_ref || github.sha }}
+  cancel-in-progress: true
+
+jobs:
+  # Tests the PHPUnit test runner.
+  #
+  # Performs the following steps:
+  # - Checks out the repository.
+  # - Installs PHP.
+  # - Installs NodeJS 14 with caching configured.
+  # - Prepares the environment for tests.
+  # - Runs the tests.
+  # - Reports the results.
+  # - Cleans up.
+  test:
+    name: Run Core PHPUnit tests
+    runs-on: ubuntu-latest
+
+    # Remove this line if Github Actions is your preferred means of running the tests.
+    if: never()
+
+    env:
+      # This is only a subset/example of env vars available. See the `.env.default` file for a full list.
+      WPT_PREPARE_DIR: ${{ secrets.WPT_PREPARE_DIR }}
+      WPT_TEST_DIR: ${{ secrets.WPT_TEST_DIR }}
+      WPT_REPORT_API_KEY: ${{ secrets.WPT_REPORT_API_KEY }}
+      WPT_PHP_EXECUTABLE: ${{ secrets.WPT_PHP_EXECUTABLE }}
+      # Database settings
+      WPT_DB_NAME: ${{ secrets.WPT_DB_NAME }}
+      WPT_DB_USER: ${{ secrets.WPT_DB_USER }}
+      WPT_DB_PASSWORD: ${{ secrets.WPT_DB_PASSWORD }}
+      WPT_DB_HOST: ${{ secrets.WPT_DB_HOST }}
+      # SSH settings for connecting to the test environment.
+      WPT_SSH_CONNECT: ${{ secrets.WPT_SSH_CONNECT }}
+      WPT_SSH_PRIVATE_KEY_BASE64: ${{ secrets.WPT_SSH_PRIVATE_KEY_BASE64 }}
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@5a4ac9002d0be2fb38bd78e4b4dbde5606d7042f # v2.3.4
+
+      - name: Set up PHP
+        uses: shivammathur/setup-php@947009a71769c25ab5292f073f5343624b7c879d # v2.12.0
+        with:
+          php-version: '7.4'
+          coverage: none
+
+      - name: Install NodeJS
+        uses: actions/setup-node@25316bbc1f10ac9d8798711f44914b1cf3c4e954 # v2.4.0
+        with:
+          node-version: 14
+
+      - name: Prepare environment
+        run: php prepare.php
+
+      - name: Run unit tests
+        run: php test.php
+        # Prevent the workflow from stopping if there are test failures.
+        continue-on-error: true
+
+      - name: Report the results
+        run: php report.php
+
+      - name: Cleanup
+        run: php cleanup.php
diff --git a/README.md b/README.md
index 7f0559d..f6a3a55 100644
--- a/README.md
+++ b/README.md
@@ -17,7 +17,7 @@ At a high level, the test suite runner:
 
 The test suite runner can be used in one of two ways:
 
-1. With Travis (or Circle or some other CI service) as the controller that connects to the remote test environment.
+1. With GitHub Actions, (or Travis, Circle, or another CI service) as the controller that connects to the remote test environment.
 2. With the runner cloned to and run directly within the test environment.
 
 The test runner is configured through environment variables, documented in [`.env.default`](.env.default). It shouldn't need any code modifications; in fact, please refrain from editing the scripts entirely, as it will make it easier to stay up to date.
diff --git a/prepare.php b/prepare.php
index ff0f7e0..26b47cb 100644
--- a/prepare.php
+++ b/prepare.php
@@ -21,6 +21,9 @@
 $WPT_SSH_PRIVATE_KEY_BASE64 = getenv( 'WPT_SSH_PRIVATE_KEY_BASE64' );
 if ( ! empty( $WPT_SSH_PRIVATE_KEY_BASE64 ) ) {
 	log_message( 'Securely extracting WPT_SSH_PRIVATE_KEY_BASE64 into ~/.ssh/id_rsa' );
+	if ( ! is_dir( getenv( 'HOME' ) . '/.ssh' ) ) {
+		mkdir( getenv( 'HOME' ) . '/.ssh', 0777, true );
+	}
 	file_put_contents( getenv( 'HOME' ) . '/.ssh/id_rsa', base64_decode( $WPT_SSH_PRIVATE_KEY_BASE64 ) );
 	perform_operations( array(
 		'chmod 600 ~/.ssh/id_rsa',