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diff --git a/vendor/symfony/expression-language/Tests/Node/NodeTest.php b/vendor/symfony/expression-language/Tests/Node/NodeTest.php
new file mode 100644
index 000000000..0f35b5feb
--- /dev/null
+++ b/vendor/symfony/expression-language/Tests/Node/NodeTest.php
@@ -0,0 +1,41 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\ExpressionLanguage\Tests\Node;
+
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\ExpressionLanguage\Node\Node;
+use Symfony\Component\ExpressionLanguage\Node\ConstantNode;
+
+class NodeTest extends TestCase
+{
+    public function testToString()
+    {
+        $node = new Node(array(new ConstantNode('foo')));
+
+        $this->assertEquals(<<<'EOF'
+Node(
+    ConstantNode(value: 'foo')
+)
+EOF
+        , (string) $node);
+    }
+
+    public function testSerialization()
+    {
+        $node = new Node(array('foo' => 'bar'), array('bar' => 'foo'));
+
+        $serializedNode = serialize($node);
+        $unserializedNode = unserialize($serializedNode);
+
+        $this->assertEquals($node, $unserializedNode);
+    }
+}