diff --git a/src/generator/enricher/phpunit/PHPUnit.php b/src/generator/enricher/phpunit/PHPUnit.php
index 9461d4fd..88d27a81 100644
--- a/src/generator/enricher/phpunit/PHPUnit.php
+++ b/src/generator/enricher/phpunit/PHPUnit.php
@@ -173,6 +173,7 @@ private function processUnit(fDOMDocument $unit, fDOMDocument $coverage) {
             }
 
             $result = array(
+                'UNKNOWN' => 0,
                 'PASSED'  => 0,
                 'SKIPPED'  => 0,
                 'INCOMPLETE'  => 0,