diff --git a/test/lib/coverage.php b/test/lib/coverage.php
index e1e37e6169..7349a3ab93 100644
--- a/test/lib/coverage.php
+++ b/test/lib/coverage.php
@@ -615,8 +615,9 @@ EOT;
             }
 
             $tracesList['time']    = $tracesInfo['time'];
-            $tracesList['ztfPath'] = $tracesInfo['ztfPath'];
+            $tracesList['ztfPath'] = empty($tracesInfo['ztfPath']) && empty($tracesList['ztfPath']) ? '' : $tracesInfo['ztfPath'];
         }
+        die;
 
         if($key == '') return $tracesList;
         return isset($tracesList[$key]) ? $tracesList[$key] : array();