diff --git a/Runner.php b/Runner.php
index b0e5383..abaeb7c 100644
--- a/Runner.php
+++ b/Runner.php
@@ -115,7 +115,7 @@ public function run($files)
             return $resultFile;
         } catch (Exception $e) {
             error_log("Exception: " . $e->getMessage() . " in " . $e->getFile() . "\n" . $e->getTraceAsString());
-            return "cc_exception_thrown";
+            return $e;
         }
     }
 }
diff --git a/engine.php b/engine.php
index c0ecfbc..d8ac2be 100644
--- a/engine.php
+++ b/engine.php
@@ -38,12 +38,11 @@
 
 $results = $server->get_all_results();
 
-// If there is no output from the runner, an exception must have occurred
 foreach ($results as $result_file) {
-    if ($result_file = "cc_exception_thrown") {
+    if (is_a($result_file, "Exception")) {
         exit(1);
-    } else {
-        echo file_get_contents($result_file);
-        unlink($result_file);
     }
+
+    echo file_get_contents($result_file);
+    unlink($result_file);
 }