diff --git a/test/functional/FileSystemFunctionalTest.php b/test/functional/FileSystemFunctionalTest.php
new file mode 100644
index 0000000..fa3cf28
--- /dev/null
+++ b/test/functional/FileSystemFunctionalTest.php
@@ -0,0 +1,30 @@
+<?php
+namespace Vfs;
+
+use RuntimeException;
+use Vfs\Test\FunctionalTestCase;
+
+class FileSystemFunctionalTest extends FunctionalTestCase
+{
+    public function testMount()
+    {
+        $this->assertFalse($this->isMounted($this->scheme));
+
+        $this->fs->mount();
+
+        $this->assertTrue($this->isMounted($this->scheme));
+    }
+
+    public function testUnmount()
+    {
+        $this->assertFalse($this->isMounted($this->scheme));
+
+        $this->fs->mount();
+
+        $this->assertTrue($this->isMounted($this->scheme));
+
+        $this->fs->unmount();
+
+        $this->assertFalse($this->isMounted($this->scheme));
+    }
+}
diff --git a/test/src/FunctionalTestCase.php b/test/src/FunctionalTestCase.php
new file mode 100644
index 0000000..145c5cb
--- /dev/null
+++ b/test/src/FunctionalTestCase.php
@@ -0,0 +1,41 @@
+<?php
+/*
+ * This file is part of VFS
+ *
+ * Copyright (c) 2014 Andrew Lawson <http://adlawson.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace Vfs\Test;
+
+use PHPUnit_Framework_TestCase as TestCase;
+use RuntimeException;
+use Vfs\FileSystemBuilder;
+
+class FunctionalTestCase extends TestCase
+{
+    protected $scheme = 'foo';
+
+    public function setUp()
+    {
+        $builder = new FileSystemBuilder($this->scheme);
+        $this->fs = $builder->build();
+    }
+
+    public function tearDown()
+    {
+        if ($this->isMounted($this->scheme)) {
+            $this->fs->unmount();
+
+            if ($this->isMounted($this->scheme)) {
+                throw new RuntimeException('Problem unmounting file system ' . $this->scheme);
+            }
+        }
+    }
+
+    protected function isMounted($scheme)
+    {
+        return in_array($scheme, stream_get_wrappers());
+    }
+}