diff --git a/src/Util/PHP/Default.php b/src/Util/PHP/Default.php
index f8b5714e5e4..e9649b66192 100644
--- a/src/Util/PHP/Default.php
+++ b/src/Util/PHP/Default.php
@@ -30,9 +30,14 @@ class PHPUnit_Util_PHP_Default extends PHPUnit_Util_PHP
     public function runJob($job, array $settings = array())
     {
         $runtime = new Runtime;
+        $runtime = $runtime->getBinary() . $this->settingsToParameters($settings);
+
+        if ('phpdbg' === PHP_SAPI) {
+            $runtime .= ' -qrr '.escapeshellarg(__DIR__ . '/eval-stdin.php');
+        }
 
         $process = proc_open(
-            $runtime->getBinary() . $this->settingsToParameters($settings),
+            $runtime,
             array(
             0 => array('pipe', 'r'),
             1 => array('pipe', 'w'),
diff --git a/src/Util/PHP/eval-stdin.php b/src/Util/PHP/eval-stdin.php
new file mode 100644
index 00000000000..afba6b2e84b
--- /dev/null
+++ b/src/Util/PHP/eval-stdin.php
@@ -0,0 +1,3 @@
+<?php
+
+eval('?>'.file_get_contents('php://input'));