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diff --git a/vendor/psy/psysh/test/Psy/Test/CodeCleaner/CallTimePassByReferencePassTest.php b/vendor/psy/psysh/test/Psy/Test/CodeCleaner/CallTimePassByReferencePassTest.php
new file mode 100644
index 000000000..e4e338f71
--- /dev/null
+++ b/vendor/psy/psysh/test/Psy/Test/CodeCleaner/CallTimePassByReferencePassTest.php
@@ -0,0 +1,73 @@
+<?php
+
+/*
+ * This file is part of Psy Shell.
+ *
+ * (c) 2012-2017 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Psy\Test\CodeCleaner;
+
+use PhpParser\NodeTraverser;
+use Psy\CodeCleaner\CallTimePassByReferencePass;
+
+class CallTimePassByReferencePassTest extends CodeCleanerTestCase
+{
+    public function setUp()
+    {
+        $this->pass      = new CallTimePassByReferencePass();
+        $this->traverser = new NodeTraverser();
+        $this->traverser->addVisitor($this->pass);
+    }
+
+    /**
+     * @dataProvider invalidStatements
+     * @expectedException \Psy\Exception\FatalErrorException
+     */
+    public function testProcessStatementFails($code)
+    {
+        if (version_compare(PHP_VERSION, '5.4', '<')) {
+            $this->markTestSkipped();
+        }
+
+        $stmts = $this->parse($code);
+        $this->traverser->traverse($stmts);
+    }
+
+    public function invalidStatements()
+    {
+        return array(
+            array('f(&$arg)'),
+            array('$object->method($first, &$arg)'),
+            array('$closure($first, &$arg, $last)'),
+            array('A::b(&$arg)'),
+        );
+    }
+
+    /**
+     * @dataProvider validStatements
+     */
+    public function testProcessStatementPasses($code)
+    {
+        $stmts = $this->parse($code);
+        $this->traverser->traverse($stmts);
+    }
+
+    public function validStatements()
+    {
+        $data = array(
+            array('array(&$var)'),
+            array('$a = &$b'),
+            array('f(array(&$b))'),
+        );
+
+        if (version_compare(PHP_VERSION, '5.4', '<')) {
+            $data = array_merge($data, $this->invalidStatements());
+        }
+
+        return $data;
+    }
+}