diff --git a/tests/InstantiatorTestAsset/XMLReaderAsset.php b/tests/InstantiatorTestAsset/XMLReaderAsset.php
new file mode 100644
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+++ b/tests/InstantiatorTestAsset/XMLReaderAsset.php
@@ -0,0 +1,42 @@
+<?php
+/*
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * This software consists of voluntary contributions made by many individuals
+ * and is licensed under the MIT license. For more information, see
+ * <http://www.doctrine-project.org>.
+ */
+
+namespace InstantiatorTestAsset;
+
+use BadMethodCallException;
+use XMLReader;
+
+/**
+ * Test asset that extends an internal PHP class
+ *
+ * @author Dave Marshall <dave@atst.io>
+ * @link https://github.com/doctrine/instantiator/pull/8
+ */
+class XMLReaderAsset extends XMLReader
+{
+    /**
+     * Constructor - should not be called
+     *
+     * @throws BadMethodCallException
+     */
+    public function __construct()
+    {
+        throw new BadMethodCallException('Not supposed to be called!');
+    }
+}