diff --git a/tests/Ddeboer/DataImport/Tests/ValueConverter/DateTimeToStringValueConverterTest.php b/tests/Ddeboer/DataImport/Tests/ValueConverter/DateTimeToStringValueConverterTest.php
index 39264251..4f90ea32 100644
--- a/tests/Ddeboer/DataImport/Tests/ValueConverter/DateTimeToStringValueConverterTest.php
+++ b/tests/Ddeboer/DataImport/Tests/ValueConverter/DateTimeToStringValueConverterTest.php
@@ -3,22 +3,23 @@
 namespace Ddeboer\DataImport\Tests\ValueConverter;
 
 use Ddeboer\DataImport\ValueConverter\DateTimeToStringValueConverter;
+use Ddeboer\DataImport\ValueConverter\DateTimeValueConverter;
 
 class DateTimeToStringValueConverterTest extends \PHPUnit_Framework_TestCase
 {
     public function testConvertWithoutOutputFormatReturnsString()
     {
         $value = new \DateTime('2010-01-01 01:00:00');
-        $converter = new DateTimeToStringValueConverter;
-        $output = $converter->convert($value);
+        $converter = new DateTimeValueConverter();
+        $output = $converter->__invoke($value);
         $this->assertEquals('2010-01-01 01:00:00', $value->format('Y-m-d H:i:s'));
     }
 
     public function testInvalidInputFormatThrowsException()
     {
         $value = '14/10/2008 09:40:20';
-        $converter = new DateTimeToStringValueConverter;
+        $converter = new DateTimeValueConverter();
         $this->setExpectedException("UnexpectedValueException", "Input must be DateTime object.");
-        $converter->convert($value);
+        $converter->__invoke($value);
     }
 }