diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
new file mode 100644
index 0000000..5aaa4ef
--- /dev/null
+++ b/.github/workflows/tests.yml
@@ -0,0 +1,82 @@
+name: Tests
+
+on:
+  push:
+    branches:
+      - develop
+      - master
+  pull_request:
+
+jobs:
+  coding-standards:
+    name: Coding standards
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Validate composer.json and composer.lock
+        run: composer validate
+
+      - name: Shellcheck
+        uses: ludeeus/action-shellcheck@master
+        with:
+          scandir: './bin'
+
+  test-installation-runkit7:
+    name: Test installation of runkit7
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        php: [7.0, 7.1, 7.2, 7.3, 7.4]
+      fail-fast: true
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Configure PHP environment
+      uses: shivammathur/setup-php@v2
+      with:
+        php-version: ${{ matrix.php }}
+        tools: pecl
+
+    - name: Create PEAR cache directory
+      run: |
+        sudo mkdir -p /tmp/pear/{cache,download,temp}
+        sudo chmod -R 777 /tmp/pear
+        pecl update-channels
+
+    - name: Run the installation script
+      run: sudo sh bin/install-runkit.sh
+
+    - name: Verify that runkit7 has been installed and activated
+      run: php -m | grep runkit
+
+  test-installation-runkit:
+    name: Test installation of runkit
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        php: [5.6]
+      fail-fast: true
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Configure PHP environment
+      uses: shivammathur/setup-php@v2
+      with:
+        php-version: ${{ matrix.php }}
+        tools: pecl
+
+    - name: Create PEAR cache directory
+      run: |
+        sudo mkdir -p /tmp/pear/{cache,download,temp}
+        sudo chmod -R 777 /tmp/pear
+        pecl update-channels
+
+    - name: Run the installation script
+      run: sudo sh bin/install-runkit.sh
+
+    - name: Verify that runkit has been installed and activated
+      run: php -m | grep runkit
+
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 7cd5ffa..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,21 +0,0 @@
-language: php
-
-php:
-  - 7.4snapshot
-  - 7.3
-  - 7.2
-
-matrix:
-  fast_finish: true
-  allow_failures:
-    - php: 7.4snapshot
-
-install:
-  - composer install --prefer-dist --no-interaction
-
-before_script:
-  - sudo mkdir -p "/etc/php/${TRAVIS_PHP_VERSION}/mods-available"
-
-script:
-  - ./vendor/bin/phpunit
-  - shellcheck bin/*.sh
diff --git a/bin/install-runkit.sh b/bin/install-runkit.sh
index c6e095b..9c671a7 100755
--- a/bin/install-runkit.sh
+++ b/bin/install-runkit.sh
@@ -1,48 +1,95 @@
 #!/usr/bin/env sh
 #
 # Automate the installation of Runkit7 in development and testing environments.
+#
+# USAGE:
+#
+#   install-runkit.sh {version}
+#
+# If an explicit version is not provided, the latest version compatible with your PHP
+# version will be installed.
 
-# Enable users to set an explicit version.
-[ "$1" ] && RUNKIT_VERSION=$1 || RUNKIT_VERSION="1.0.9"
+# Helpers for printing messages with color.
+error() {
+    printf "\\033[0;31m%s\\033[0;0m\\n" "$1"
+}
 
-DOWNLOAD_FILENAME="runkit-${RUNKIT_VERSION}.tgz"
+notice() {
+    printf "\\033[0;33m%s\\033[0;0m\\n" "$1"
+}
 
 # Download a Runkit7 tarball using either cURL or Wget (depending on environment).
 download() {
     echo "Downloading Runkit7 from ${1}"
     if [ "$(command -v curl)" ]; then
-        curl -sL "$1" > "$2";
+        curl -sSL "$1" > "$2";
     elif [ "$(command -v wget)" ]; then
         wget -nv -O "$2" "$1"
     else
-        echo "\\033[0;31mNo suitable download utility was found, unable to proceed!\\033[0;m"
+        error 'No suitable download utility was found, unable to proceed!'
         exit 1
     fi
 }
 
 # Verify that PECL is installed.
 if [ ! "$(command -v pecl)" ]; then
-    echo "\\033[0;31mPECL (and, by extension, PEAR) is required in order to install Runkit7."
-    echo "Please see http://pear.php.net/manual/en/installation.getting.php for more information.\\033[0;m"
+    error 'PECL (and, by extension, PEAR) is required in order to install Runkit7.
+Please see http://pear.php.net/manual/en/installation.getting.php for more information.'
     exit 1
 fi
 
-# Download and install Runkit7.
-echo "\\033[0;33mInstalling Runkit7...\\033[0;m"
-download "https://github.com/runkit7/runkit7/releases/download/${RUNKIT_VERSION}/runkit-${RUNKIT_VERSION}.tgz" "$DOWNLOAD_FILENAME" \
-    && pecl install "$DOWNLOAD_FILENAME" \
-    && rm "$DOWNLOAD_FILENAME"
+PHP_MAJOR_VERSION="$(php -r "echo PHP_MAJOR_VERSION;")"
+PHP_VERSION=$(php -r "echo PHP_MAJOR_VERSION . '.' . PHP_MINOR_VERSION;")
+EXTENSION="runkit7"
+
+# Enable users to set an explicit version.
+if [ -n "$1" ]; then
+    RUNKIT_VERSION="runkit7-${1}"
+elif [ "$PHP_MAJOR_VERSION" -lt 7 ]; then
+    RUNKIT_VERSION="runkit"
+    EXTENSION="runkit"
+else
+    case "$PHP_VERSION" in
+        "7.0")
+            RUNKIT_VERSION="runkit7-1.0.11"
+            TARBALL="https://github.com/runkit7/runkit7/releases/download/1.0.11/runkit-1.0.11.tgz"
+            EXTENSION="runkit"
+            ;;
+        "7.1")
+            RUNKIT_VERSION="runkit7-3.1.0a1"
+            ;;
+        *)
+            RUNKIT_VERSION="runkit7-alpha"
+            ;;
+    esac
+fi
+
+# Install runkit(7) via PECL.
+notice "Installing ${RUNKIT_VERSION}..."
+
+# If we're using a tarball, download it and prepare PECL to install from the downloaded version.
+if [ -n "$TARBALL" ]; then
+    download "$TARBALL" "${RUNKIT_VERSION}.tgz"
+    echo "> $ pecl install ${RUNKIT_VERSION}.tgz"
+    pecl install "$RUNKIT_VERSION.tgz" || exit 1
+    rm "${RUNKIT_VERSION}.tgz"
+else
+    echo "> $ pecl install ${RUNKIT_VERSION}"
+    pecl install "$RUNKIT_VERSION" || exit 1
+fi
 
-# Create runkit.ini files for each version of PHP.
-MODS=$(find /etc/php/ -name "mods-available" -type d)
+# Create .ini files for each version of PHP.
+MODS=$(find /etc/php/ -name "mods-available" -type d 2> /dev/null || echo '')
 for DIR in $MODS; do
-    if [ ! -f "$DIR/runkit.ini" ]; then
-        echo "extension=runkit.so" | sudo tee "$DIR/runkit.ini" > /dev/null \
-            && echo "Created ${DIR}/runkit.ini"
+    if [ ! -f "${DIR}/${EXTENSION}.ini" ]; then
+        echo "extension=${EXTENSION}.so" | sudo tee "${DIR}/${EXTENSION}.ini" > /dev/null \
+            && echo "Created ${DIR}/${EXTENSION}.ini"
     fi
 done
 
 # Attempt to enable the Runkit PHP module.
 if [ "$(command -v phpenmod)" ]; then
-    sudo phpenmod runkit && echo "\\033[0;32mRunkit7 has been installed and activated!\\033[0;0m"
+    sudo phpenmod "$EXTENSION" && echo "\\033[0;32m${EXTENSION} has been installed and activated!\\033[0;0m"
+else
+    notice "${RUNKIT_VERSION} has been installed, but may require manual activation."
 fi
diff --git a/composer.json b/composer.json
index 00ed0e5..1a72206 100644
--- a/composer.json
+++ b/composer.json
@@ -1,6 +1,6 @@
 {
     "name": "stevegrunwell/runkit7-installer",
-    "description": "Installer for PHP Runkit7",
+    "description": "Installer for PHP's runkit and runkit7 extensions",
     "license": "MIT",
     "keywords": [
         "runkit",
@@ -9,7 +9,6 @@
     "authors": [
         {
             "name": "Steve Grunwell",
-            "email": "steve@stevegrunwell.com",
             "homepage": "https://stevegrunwell.com"
         }
     ],
@@ -17,10 +16,6 @@
         "issues": "https://github.com/stevegrunwell/runkit7-installer/issues",
         "source": "https://github.com/stevegrunwell/runkit7-installer"
     },
-    "require-dev": {
-        "php": "^7.2",
-        "phpunit/phpunit": ">=8.0"
-    },
     "bin": [
         "bin/install-runkit.sh"
     ]
diff --git a/tests/InstallTest.php b/tests/InstallTest.php
deleted file mode 100644
index 39fcd8c..0000000
--- a/tests/InstallTest.php
+++ /dev/null
@@ -1,61 +0,0 @@
-<?php
-/**
- * Tests the installation of Runkit7.
- *
- * @package SteveGrunwell\Runkit7
- */
-
-use PHPUnit\Framework\TestCase;
-
-class InstallTest extends TestCase
-{
-    public function testInstallsRunkit()
-    {
-        $this->assertFalse(
-            extension_loaded('runkit'),
-            'Expected the Runkit extension to not yet be loaded.'
-        );
-
-        $version = PHP_MAJOR_VERSION . '.' . PHP_MINOR_VERSION;
-
-        exec(dirname(__DIR__) . '/bin/install-runkit.sh', $output, $exitCode);
-
-        $this->assertEquals(0, $exitCode, 'Expected an exit code of 0:' . $this->quoteShellOutput($output));
-        $this->assertTrue(
-            (bool) preg_match('/^runkit\s/m', shell_exec('pecl list')),
-            'The Runkit extension should have been loaded.'
-        );
-        $this->assertTrue(
-            file_exists('/etc/php/' . $version . '/mods-available/runkit.ini'),
-            'Expected a runkit.ini file to be created for PHP ' . $version . '.'
-        );
-    }
-
-    /**
-     * @requires extension runkit
-     * @runInSeparateProcess
-     */
-    public function testRunkitFunctionsAreAvailable()
-    {
-        $this->assertTrue(function_exists('runkit_constant_add'));
-        $this->assertTrue(function_exists('runkit_constant_remove'));
-        $this->assertTrue(function_exists('runkit_function_add'));
-        $this->assertTrue(function_exists('runkit_function_remove'));
-    }
-
-    /**
-     * Quote the output of the shell script.
-     *
-     * @param array $output The output captured by exec().
-     *
-     * @return string A string suitable for printing as a debug message.
-     */
-    protected function quoteShellOutput(array $output): string
-    {
-        $result = array_reduce($output, function ($result, $line) {
-            return $result .= PHP_EOL . '    ' . $line;
-        }, '');
-
-        return PHP_EOL . "\033[0;36m$result\033[0;m" . PHP_EOL;
-    }
-}