diff --git a/src/PhpFpm.php b/src/PhpFpm.php
index c14a855..fd8b2a0 100644
--- a/src/PhpFpm.php
+++ b/src/PhpFpm.php
@@ -7,40 +7,38 @@
 
 class PhpFpm
 {
+    var $brew, $cli;
+
+    var $taps = [
+        'homebrew/dupes', 'homebrew/versions', 'homebrew/homebrew-php'
+    ];
+
+    /**
+     * Create a new PHP FPM class instance.
+     *
+     * @param  Brew  $brew
+     * @param  CommandLine  $cli
+     * @return void
+     */
+    function __construct(Brew $brew, CommandLine $cli)
+    {
+        $this->cli = $cli;
+        $this->brew = $brew;
+    }
+
     /**
      * Install and configure DnsMasq.
      *
      * @param  OutputInterface  $output
      * @return void
      */
-    public static function install($output)
+    function install($output)
     {
-        if (! Brew::hasInstalledPhp()) {
-            static::download($output);
-        }
+        $this->brew->ensureInstalled('php70', $this->taps);
 
-        static::updateConfiguration();
+        $this->updateConfiguration();
 
-        static::restart();
-    }
-
-    /**
-     * Download a fresh copy of PHP 7.0 from Brew.
-     *
-     * @param  OutputInterface  $output
-     * @return void
-     */
-    public static function download($output)
-    {
-        $output->writeln('<info>PHP 7.0 is not installed, installing it now via Brew...</info> 🍻');
-
-        Brew::tap('homebrew/dupes', 'homebrew/versions', 'homebrew/homebrew-php');
-
-        run('brew install php70', function ($exitCode, $processOutput) use ($output)  {
-            $output->write($processOutput);
-
-            throw new Exception('We were unable to install PHP.');
-        });
+        $this->restart();
     }
 
     /**
@@ -48,11 +46,11 @@ public static function download($output)
      *
      * @return void
      */
-    public static function updateConfiguration()
+    function updateConfiguration()
     {
-        quietly('sed -i "" -E "s/^user = .+$/user = '.$_SERVER['SUDO_USER'].'/" '.static::fpmConfigPath());
+        $this->cli->quietly('sed -i "" -E "s/^user = .+$/user = '.user().'/" '.$this->fpmConfigPath());
 
-        quietly('sed -i "" -E "s/^group = .+$/group = staff/" '.static::fpmConfigPath());
+        $this->cli->quietly('sed -i "" -E "s/^group = .+$/group = staff/" '.$this->fpmConfigPath());
     }
 
     /**
@@ -60,11 +58,11 @@ public static function updateConfiguration()
      *
      * @return void
      */
-    public static function restart()
+    function restart()
     {
-        static::stop();
+        $this->stop();
 
-        Brew::restartLinkedPhp();
+        $this->brew->restartLinkedPhp();
     }
 
     /**
@@ -72,9 +70,9 @@ public static function restart()
      *
      * @return void
      */
-    public static function stop()
+    function stop()
     {
-        Brew::stopService('php56', 'php70');
+        $this->brew->stopService('php56', 'php70');
     }
 
     /**
@@ -82,9 +80,9 @@ public static function stop()
      *
      * @return string
      */
-    protected static function fpmConfigPath()
+    function fpmConfigPath()
     {
-        if (Brew::linkedPhp() === 'php70') {
+        if ($this->brew->linkedPhp() === 'php70') {
             return '/usr/local/etc/php/7.0/php-fpm.d/www.conf';
         } else {
             return '/usr/local/etc/php/5.6/php-fpm.conf';
diff --git a/tests/BrewTest.php b/tests/BrewTest.php
index dbfcde6..ed26e99 100644
--- a/tests/BrewTest.php
+++ b/tests/BrewTest.php
@@ -30,12 +30,12 @@ public function test_brew_can_be_resolved_from_container()
     public function test_installed_returns_true_when_given_formula_is_installed()
     {
         $cli = Mockery::mock(CommandLine::class);
-        $cli->shouldReceive('run')->with('brew list | grep php70')->andReturn('php70');
+        $cli->shouldReceive('run')->once()->with('brew list | grep php70')->andReturn('php70');
         swap(CommandLine::class, $cli);
         $this->assertTrue(resolve(Brew::class)->installed('php70'));
 
         $cli = Mockery::mock(CommandLine::class);
-        $cli->shouldReceive('run')->with('brew list | grep php70')->andReturn('php70-mcrypt
+        $cli->shouldReceive('run')->once()->with('brew list | grep php70')->andReturn('php70-mcrypt
 php70');
         swap(CommandLine::class, $cli);
         $this->assertTrue(resolve(Brew::class)->installed('php70'));
@@ -45,17 +45,17 @@ public function test_installed_returns_true_when_given_formula_is_installed()
     public function test_installed_returns_false_when_given_formula_is_not_installed()
     {
         $cli = Mockery::mock(CommandLine::class);
-        $cli->shouldReceive('run')->with('brew list | grep php70')->andReturn('');
+        $cli->shouldReceive('run')->once()->with('brew list | grep php70')->andReturn('');
         swap(CommandLine::class, $cli);
         $this->assertFalse(resolve(Brew::class)->installed('php70'));
 
         $cli = Mockery::mock(CommandLine::class);
-        $cli->shouldReceive('run')->with('brew list | grep php70')->andReturn('php70-mcrypt');
+        $cli->shouldReceive('run')->once()->with('brew list | grep php70')->andReturn('php70-mcrypt');
         swap(CommandLine::class, $cli);
         $this->assertFalse(resolve(Brew::class)->installed('php70'));
 
         $cli = Mockery::mock(CommandLine::class);
-        $cli->shouldReceive('run')->with('brew list | grep php70')->andReturn('php70-mcrypt
+        $cli->shouldReceive('run')->once()->with('brew list | grep php70')->andReturn('php70-mcrypt
 php70-something-else
 php7');
         swap(CommandLine::class, $cli);
@@ -66,18 +66,18 @@ public function test_installed_returns_false_when_given_formula_is_not_installed
     public function test_has_installed_php_indicates_if_php_is_installed_via_brew()
     {
         $brew = Mockery::mock(Brew::class.'[installed]', [new CommandLine, new Filesystem]);
-        $brew->shouldReceive('installed')->with('php70')->andReturn(true);
+        $brew->shouldReceive('installed')->once()->with('php70')->andReturn(true);
         $brew->shouldReceive('installed')->with('php56')->andReturn(true);
         $this->assertTrue($brew->hasInstalledPhp());
 
         $brew = Mockery::mock(Brew::class.'[installed]', [new CommandLine, new Filesystem]);
-        $brew->shouldReceive('installed')->with('php70')->andReturn(true);
+        $brew->shouldReceive('installed')->once()->with('php70')->andReturn(true);
         $brew->shouldReceive('installed')->with('php56')->andReturn(false);
         $this->assertTrue($brew->hasInstalledPhp());
 
         $brew = Mockery::mock(Brew::class.'[installed]', [new CommandLine, new Filesystem]);
-        $brew->shouldReceive('installed')->with('php70')->andReturn(false);
-        $brew->shouldReceive('installed')->with('php56')->andReturn(false);
+        $brew->shouldReceive('installed')->once()->with('php70')->andReturn(false);
+        $brew->shouldReceive('installed')->once()->with('php56')->andReturn(false);
         $this->assertFalse($brew->hasInstalledPhp());
     }
 
@@ -85,8 +85,8 @@ public function test_has_installed_php_indicates_if_php_is_installed_via_brew()
     public function test_tap_taps_the_given_homebrew_repository()
     {
         $cli = Mockery::mock(CommandLine::class);
-        $cli->shouldReceive('passthru')->with('sudo -u Taylor brew tap php70');
-        $cli->shouldReceive('passthru')->with('sudo -u Taylor brew tap php56');
+        $cli->shouldReceive('passthru')->once()->with('sudo -u Taylor brew tap php70');
+        $cli->shouldReceive('passthru')->once()->with('sudo -u Taylor brew tap php56');
         swap(CommandLine::class, $cli);
         resolve(Brew::class)->tap('php70', 'php56');
     }
@@ -95,7 +95,7 @@ public function test_tap_taps_the_given_homebrew_repository()
     public function test_restart_restarts_the_service_using_homebrew_services()
     {
         $cli = Mockery::mock(CommandLine::class);
-        $cli->shouldReceive('quietly')->with('sudo brew services restart dnsmasq');
+        $cli->shouldReceive('quietly')->once()->with('sudo brew services restart dnsmasq');
         swap(CommandLine::class, $cli);
         resolve(Brew::class)->restartService('dnsmasq');
     }
@@ -104,7 +104,7 @@ public function test_restart_restarts_the_service_using_homebrew_services()
     public function test_stop_stops_the_service_using_homebrew_services()
     {
         $cli = Mockery::mock(CommandLine::class);
-        $cli->shouldReceive('quietly')->with('sudo brew services stop dnsmasq');
+        $cli->shouldReceive('quietly')->once()->with('sudo brew services stop dnsmasq');
         swap(CommandLine::class, $cli);
         resolve(Brew::class)->stopService('dnsmasq');
     }
@@ -113,14 +113,14 @@ public function test_stop_stops_the_service_using_homebrew_services()
     public function test_linked_php_returns_linked_php_formula_name()
     {
         $files = Mockery::mock(Filesystem::class);
-        $files->shouldReceive('isLink')->with('/usr/local/bin/php')->andReturn(true);
-        $files->shouldReceive('readLink')->with('/usr/local/bin/php')->andReturn('/test/path/php70/test');
+        $files->shouldReceive('isLink')->once()->with('/usr/local/bin/php')->andReturn(true);
+        $files->shouldReceive('readLink')->once()->with('/usr/local/bin/php')->andReturn('/test/path/php70/test');
         swap(Filesystem::class, $files);
         $this->assertEquals('php70', resolve(Brew::class)->linkedPhp());
 
         $files = Mockery::mock(Filesystem::class);
-        $files->shouldReceive('isLink')->with('/usr/local/bin/php')->andReturn(true);
-        $files->shouldReceive('readLink')->with('/usr/local/bin/php')->andReturn('/test/path/php56/test');
+        $files->shouldReceive('isLink')->once()->with('/usr/local/bin/php')->andReturn(true);
+        $files->shouldReceive('readLink')->once()->with('/usr/local/bin/php')->andReturn('/test/path/php56/test');
         swap(Filesystem::class, $files);
         $this->assertEquals('php56', resolve(Brew::class)->linkedPhp());
     }
@@ -132,7 +132,7 @@ public function test_linked_php_returns_linked_php_formula_name()
     public function test_linked_php_throws_exception_if_no_php_link()
     {
         $files = Mockery::mock(Filesystem::class);
-        $files->shouldReceive('isLink')->with('/usr/local/bin/php')->andReturn(false);
+        $files->shouldReceive('isLink')->once()->with('/usr/local/bin/php')->andReturn(false);
         swap(Filesystem::class, $files);
         resolve(Brew::class)->linkedPhp();
     }
@@ -144,8 +144,8 @@ public function test_linked_php_throws_exception_if_no_php_link()
     public function test_linked_php_throws_exception_if_unsupported_php_version_is_linked()
     {
         $files = Mockery::mock(Filesystem::class);
-        $files->shouldReceive('isLink')->with('/usr/local/bin/php')->andReturn(true);
-        $files->shouldReceive('readLink')->with('/usr/local/bin/php')->andReturn('/test/path/php42/test');
+        $files->shouldReceive('isLink')->once()->with('/usr/local/bin/php')->andReturn(true);
+        $files->shouldReceive('readLink')->once()->with('/usr/local/bin/php')->andReturn('/test/path/php42/test');
         swap(Filesystem::class, $files);
         resolve(Brew::class)->linkedPhp();
     }
@@ -154,7 +154,7 @@ public function test_linked_php_throws_exception_if_unsupported_php_version_is_l
     public function test_install_or_fail_will_install_brew_formulas()
     {
         $cli = Mockery::mock(CommandLine::class);
-        $cli->shouldReceive('run')->with('brew install dnsmasq', Mockery::type('Closure'));
+        $cli->shouldReceive('run')->once()->with('brew install dnsmasq', Mockery::type('Closure'));
         swap(CommandLine::class, $cli);
         resolve(Brew::class)->installOrFail('dnsmasq');
     }
@@ -163,10 +163,10 @@ public function test_install_or_fail_will_install_brew_formulas()
     public function test_install_or_fail_can_install_taps()
     {
         $cli = Mockery::mock(CommandLine::class);
-        $cli->shouldReceive('run')->with('brew install dnsmasq', Mockery::type('Closure'));
+        $cli->shouldReceive('run')->once()->with('brew install dnsmasq', Mockery::type('Closure'));
         swap(CommandLine::class, $cli);
         $brew = Mockery::mock(Brew::class.'[tap]', [$cli, new Filesystem]);
-        $brew->shouldReceive('tap')->with(['test/tap']);
+        $brew->shouldReceive('tap')->once()->with(['test/tap']);
         $brew->installOrFail('dnsmasq', ['test/tap']);
     }
 
diff --git a/tests/DnsMasqTest.php b/tests/DnsMasqTest.php
index bd3c7b5..fe31b3d 100644
--- a/tests/DnsMasqTest.php
+++ b/tests/DnsMasqTest.php
@@ -29,8 +29,8 @@ public function tearDown()
     public function test_install_installs_and_places_configuration_files_in_proper_locations()
     {
         $brew = Mockery::mock(Brew::class);
-        $brew->shouldReceive('ensureInstalled')->with('dnsmasq');
-        $brew->shouldReceive('restartService')->with('dnsmasq');
+        $brew->shouldReceive('ensureInstalled')->once()->with('dnsmasq');
+        $brew->shouldReceive('restartService')->once()->with('dnsmasq');
         swap(Brew::class, $brew);
 
         $dnsMasq = resolve(StubForCreatingCustomDnsMasqConfigFiles::class);
diff --git a/tests/PhpFpmTest.php b/tests/PhpFpmTest.php
new file mode 100644
index 0000000..bb8d35f
--- /dev/null
+++ b/tests/PhpFpmTest.php
@@ -0,0 +1,45 @@
+<?php
+
+use Valet\Brew;
+use Valet\PhpFpm;
+use Valet\CommandLine;
+use Illuminate\Container\Container;
+
+class PhpFpmTest extends PHPUnit_Framework_TestCase
+{
+    public function setUp()
+    {
+        $_SERVER['SUDO_USER'] = 'Taylor';
+
+        Container::setInstance(new Container);
+    }
+
+
+    public function tearDown()
+    {
+        exec('rm -rf '.__DIR__.'/output');
+        mkdir(__DIR__.'/output');
+        touch(__DIR__.'/output/.gitkeep');
+
+        Mockery::close();
+    }
+
+
+    public function test_update_configuration_replaces_user_and_group_in_config_file()
+    {
+        copy(__DIR__.'/files/fpm.conf', __DIR__.'/output/fpm.conf');
+        resolve(StubForUpdatingFpmConfigFiles::class)->updateConfiguration();
+        $contents = file_get_contents(__DIR__.'/output/fpm.conf');
+        $this->assertTrue(strpos($contents, 'user = '.user()) !== false);
+        $this->assertTrue(strpos($contents, 'group = staff') !== false);
+    }
+}
+
+
+class StubForUpdatingFpmConfigFiles extends PhpFpm
+{
+    function fpmConfigPath()
+    {
+        return __DIR__.'/output/fpm.conf';
+    }
+}
diff --git a/tests/files/fpm.conf b/tests/files/fpm.conf
new file mode 100644
index 0000000..23c2f0f
--- /dev/null
+++ b/tests/files/fpm.conf
@@ -0,0 +1,6 @@
+Test contents
+
+user = something
+group = something-else
+
+more contents