diff --git a/PhpUnit/AbstractConfigurationTestCase.php b/PhpUnit/AbstractConfigurationTestCase.php
index 5b26803..ddfd020 100644
--- a/PhpUnit/AbstractConfigurationTestCase.php
+++ b/PhpUnit/AbstractConfigurationTestCase.php
@@ -35,6 +35,21 @@ protected function assertConfigurationIsInvalid(array $configurationValues, $exp
         );
     }
 
+    /**
+     * Assert that the given configuration values are valid.
+     *
+     * @param array $configurationValues
+     */
+    protected function assertConfigurationIsValid(array $configurationValues)
+    {
+        self::assertThat(
+            $configurationValues,
+            new ConfigurationValuesAreValidConstraint(
+                $this->getConfiguration()
+            )
+        );
+    }
+
     /**
      * Assert that the given configuration values, when processed, will equal to the given array
      *
diff --git a/PhpUnit/ConfigurationValuesAreValidConstraint.php b/PhpUnit/ConfigurationValuesAreValidConstraint.php
new file mode 100644
index 0000000..9b36499
--- /dev/null
+++ b/PhpUnit/ConfigurationValuesAreValidConstraint.php
@@ -0,0 +1,34 @@
+<?php
+
+namespace Matthias\SymfonyConfigTest\PhpUnit;
+
+use Symfony\Component\Config\Definition\ConfigurationInterface;
+use Symfony\Component\Config\Definition\Exception\InvalidConfigurationException;
+
+class ConfigurationValuesAreValidConstraint extends AbstractConfigurationConstraint
+{
+    public function __construct(ConfigurationInterface $configuration)
+    {
+        parent::__construct($configuration);
+    }
+
+    public function matches($other)
+    {
+        $this->validateConfigurationValuesArray($other);
+
+        $success = true;
+
+        try {
+            $this->processConfiguration($other);
+        } catch (InvalidConfigurationException $exception) {
+            $success = false;
+        }
+
+        return $success;
+    }
+
+    public function toString()
+    {
+        return 'is valid for the given configuration';
+    }
+}
diff --git a/Tests/PhpUnit/AbstractConfigurationTestCaseTest.php b/Tests/PhpUnit/AbstractConfigurationTestCaseTest.php
index e1bb196..52d3a09 100644
--- a/Tests/PhpUnit/AbstractConfigurationTestCaseTest.php
+++ b/Tests/PhpUnit/AbstractConfigurationTestCaseTest.php
@@ -39,6 +39,32 @@ public function it_fails_when_a_configuration_is_valid_when_it_should_have_been_
         );
     }
 
+    /**
+     * @test
+     */
+    public function it_can_assert_that_a_configuration_is_valid()
+    {
+        $this->assertConfigurationIsValid(
+            array(
+                array('required_value' => 'some value')
+            )
+        );
+    }
+
+    /**
+     * @test
+     */
+    public function it_fails_when_a_configuration_is_invalid_when_it_should_have_been_valid()
+    {
+        $this->setExpectedException('\PHPUnit_Framework_ExpectationFailedException', 'valid');
+
+        $this->assertConfigurationIsValid(
+            array(
+                array()
+            )
+        );
+    }
+
     /**
      * @test
      */
diff --git a/Tests/PhpUnit/ConfigurationValuesAreValidConstraintTest.php b/Tests/PhpUnit/ConfigurationValuesAreValidConstraintTest.php
new file mode 100644
index 0000000..80ebdbe
--- /dev/null
+++ b/Tests/PhpUnit/ConfigurationValuesAreValidConstraintTest.php
@@ -0,0 +1,64 @@
+<?php
+
+namespace Matthias\SymfonyConfigTest\Tests;
+
+use Matthias\SymfonyConfigTest\PhpUnit\ConfigurationValuesAreValidConstraint;
+use Matthias\SymfonyConfigTest\Tests\PhpUnit\Fixtures\AlwaysValidConfiguration;
+use Matthias\SymfonyConfigTest\Tests\PhpUnit\Fixtures\ConfigurationWithRequiredValue;
+
+class ConfigurationValuesAreValidConstraintTest extends \PHPUnit_Framework_TestCase
+{
+    /**
+     * @test
+     */
+    public function if_configuration_values_is_no_array_it_fails()
+    {
+        $constraint = new ConfigurationValuesAreValidConstraint(new AlwaysValidConfiguration());
+
+        $this->setExpectedException('\InvalidArgumentException', 'array');
+
+        $constraint->evaluate('not an array');
+    }
+
+    /**
+     * @test
+     */
+    public function if_configuration_values_is_no_array_of_arrays_it_fails()
+    {
+        $constraint = new ConfigurationValuesAreValidConstraint(new AlwaysValidConfiguration());
+
+        $this->setExpectedException('\InvalidArgumentException', 'array');
+
+        $constraint->evaluate(array('not an array'));
+    }
+
+    /**
+     * @test
+     */
+    public function if_configuration_values_are_valid_it_matches()
+    {
+        $constraint = new ConfigurationValuesAreValidConstraint(new AlwaysValidConfiguration());
+
+        $this->assertTrue($constraint->evaluate(array(array()), '', true));
+    }
+
+    /**
+     * @test
+     */
+    public function if_configuration_values_are_invalid_it_does_not_match()
+    {
+        $constraint = new ConfigurationValuesAreValidConstraint(new ConfigurationWithRequiredValue());
+
+        $this->assertFalse($constraint->evaluate(array(array()), '', true));
+    }
+
+    /**
+     * @test
+     */
+    public function to_string_returns_a_message()
+    {
+        $constraint = new ConfigurationValuesAreValidConstraint(new AlwaysValidConfiguration());
+
+        $this->assertSame('is valid for the given configuration', $constraint->toString());
+    }
+}