diff --git a/src/ForwardCompatibility/Assert.php b/src/ForwardCompatibility/Assert.php
new file mode 100644
index 00000000000..cf3186ae3fd
--- /dev/null
+++ b/src/ForwardCompatibility/Assert.php
@@ -0,0 +1,17 @@
+<?php
+/*
+ * This file is part of PHPUnit.
+ *
+ * (c) Sebastian Bergmann <sebastian@phpunit.de>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace PHPUnit\Framework;
+
+use PHPUnit_Framework_Assert;
+
+abstract class Assert extends PHPUnit_Framework_Assert
+{
+}
diff --git a/src/ForwardCompatibility/BaseTestListener.php b/src/ForwardCompatibility/BaseTestListener.php
new file mode 100644
index 00000000000..3eef4902c89
--- /dev/null
+++ b/src/ForwardCompatibility/BaseTestListener.php
@@ -0,0 +1,17 @@
+<?php
+/*
+ * This file is part of PHPUnit.
+ *
+ * (c) Sebastian Bergmann <sebastian@phpunit.de>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace PHPUnit\Framework;
+
+use PHPUnit_Framework_BaseTestListener;
+
+abstract class BaseTestListener extends PHPUnit_Framework_BaseTestListener
+{
+}
diff --git a/src/ForwardCompatibility/TestCase.php b/src/ForwardCompatibility/TestCase.php
new file mode 100644
index 00000000000..03189e3bf31
--- /dev/null
+++ b/src/ForwardCompatibility/TestCase.php
@@ -0,0 +1,17 @@
+<?php
+/*
+ * This file is part of PHPUnit.
+ *
+ * (c) Sebastian Bergmann <sebastian@phpunit.de>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace PHPUnit\Framework;
+
+use PHPUnit_Framework_TestCase;
+
+abstract class TestCase extends PHPUnit_Framework_TestCase
+{
+}
diff --git a/src/ForwardCompatibility/TestListener.php b/src/ForwardCompatibility/TestListener.php
new file mode 100644
index 00000000000..8440b14aea8
--- /dev/null
+++ b/src/ForwardCompatibility/TestListener.php
@@ -0,0 +1,17 @@
+<?php
+/*
+ * This file is part of PHPUnit.
+ *
+ * (c) Sebastian Bergmann <sebastian@phpunit.de>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace PHPUnit\Framework;
+
+use PHPUnit_Framework_TestListener;
+
+interface TestListener extends PHPUnit_Framework_TestListener
+{
+}