diff --git a/src/Symfony/Component/VarDumper/Test/VarDumperTestCase.php b/src/Symfony/Component/VarDumper/Test/VarDumperTestCase.php
new file mode 100644
index 0000000000000..42a915e8ed623
--- /dev/null
+++ b/src/Symfony/Component/VarDumper/Test/VarDumperTestCase.php
@@ -0,0 +1,45 @@
+<?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\VarDumper\Test;
+
+use Symfony\Component\VarDumper\Cloner\VarCloner;
+use Symfony\Component\VarDumper\Dumper\CliDumper;
+
+/**
+ * @author Nicolas Grekas <p@tchwork.com>
+ */
+abstract class VarDumperTestCase extends \PHPUnit_Framework_TestCase
+{
+    public function assertDumpEquals($dump, $data, $message = '')
+    {
+        $this->assertSame($dump, $this->getVarDumperDump($data), $message);
+    }
+
+    public function assertDumpMatchesFormat($dump, $data, $message = '')
+    {
+        $this->assertStringMatchesFormat($dump, $this->getVarDumperDump($data), $message);
+    }
+
+    private function getVarDumperDump($data)
+    {
+        $h = fopen('php://memory', 'r+b');
+        $cloner = new VarCloner();
+        $dumper = new CliDumper($h);
+        $dumper->setColors(false);
+        $dumper->dump($cloner->cloneVar($data)->withRefHandles(false));
+        fseek($h, 0);
+        $data = stream_get_contents($h);
+        fclose($h);
+
+        return $data;
+    }
+}
diff --git a/src/Symfony/Component/VarDumper/Test/VarDumperTestTrait.php b/src/Symfony/Component/VarDumper/Test/VarDumperTestTrait.php
new file mode 100644
index 0000000000000..130447bcf626e
--- /dev/null
+++ b/src/Symfony/Component/VarDumper/Test/VarDumperTestTrait.php
@@ -0,0 +1,45 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\VarDumper\Test;
+
+use Symfony\Component\VarDumper\Cloner\VarCloner;
+use Symfony\Component\VarDumper\Dumper\CliDumper;
+
+/**
+ * @author Nicolas Grekas <p@tchwork.com>
+ */
+trait VarDumperTestTrait
+{
+    public function assertDumpEquals($dump, $data, $message = '')
+    {
+        $this->assertSame($dump, $this->getVarDumperDump($data), $message);
+    }
+
+    public function assertDumpMatchesFormat($dump, $data, $message = '')
+    {
+        $this->assertStringMatchesFormat($dump, $this->getVarDumperDump($data), $message);
+    }
+
+    private function getVarDumperDump($data)
+    {
+        $h = fopen('php://memory', 'r+b');
+        $cloner = new VarCloner();
+        $dumper = new CliDumper($h);
+        $dumper->setColors(false);
+        $dumper->dump($cloner->cloneVar($data)->withRefHandles(false));
+        fseek($h, 0);
+        $data = stream_get_contents($h);
+        fclose($h);
+
+        return $data;
+    }
+}
diff --git a/src/Symfony/Component/VarDumper/Tests/CliDumperTest.php b/src/Symfony/Component/VarDumper/Tests/CliDumperTest.php
index e788b7f2017eb..6e70f6b01b0e3 100644
--- a/src/Symfony/Component/VarDumper/Tests/CliDumperTest.php
+++ b/src/Symfony/Component/VarDumper/Tests/CliDumperTest.php
@@ -13,11 +13,12 @@
 
 use Symfony\Component\VarDumper\Cloner\VarCloner;
 use Symfony\Component\VarDumper\Dumper\CliDumper;
+use Symfony\Component\VarDumper\Test\VarDumperTestCase;
 
 /**
  * @author Nicolas Grekas <p@tchwork.com>
  */
-class CliDumperTest extends \PHPUnit_Framework_TestCase
+class CliDumperTest extends VarDumperTestCase
 {
     public function testGet()
     {
@@ -115,21 +116,10 @@ public function testXmlResource()
         }
 
         $var = xml_parser_create();
-        $ref = (int) $var;
 
-        $dumper = new CliDumper();
-        $dumper->setColors(false);
-        $cloner = new VarCloner();
-
-        $data = $cloner->cloneVar($var);
-        $out = fopen('php://memory', 'r+b');
-        $dumper->dump($data, $out);
-        rewind($out);
-        $out = stream_get_contents($out);
-
-        $this->assertSame(
+        $this->assertDumpEquals(
             <<<EOTXT
-:xml {@{$ref}
+:xml {
   current_byte_index: 0
   current_column_number: 1
   current_line_number: 1
@@ -138,7 +128,7 @@ public function testXmlResource()
 
 EOTXT
             ,
-            $out
+            $var
         );
     }
 
@@ -190,7 +180,7 @@ public function testThrowingCaster()
 
 EOTXT
             ,
-            $out
+            $var
         );
     }
 
@@ -206,17 +196,7 @@ public function testSpecialVars56()
 
         $var = $this->getSpecialVars();
 
-        $dumper = new CliDumper();
-        $dumper->setColors(false);
-        $cloner = new VarCloner();
-
-        $data = $cloner->cloneVar($var);
-        $out = fopen('php://memory', 'r+b');
-        $dumper->dump($data, $out);
-        rewind($out);
-        $out = stream_get_contents($out);
-
-        $this->assertSame(
+        $this->assertDumpEquals(
             <<<EOTXT
 array:3 [
   0 => array:1 [