diff --git a/RoboFile.php b/RoboFile.php
index 31b9892..0f1a349 100644
--- a/RoboFile.php
+++ b/RoboFile.php
@@ -96,11 +96,11 @@ class RoboFile extends \Robo\Tasks {
         if (extension_loaded("pcov")) {
             return "$php -d pcov.enabled=1 -d pcov.directory=$code";
         } elseif (extension_loaded("xdebug")) {
-            return $php;
+            return "$php -d xdebug.mode=coverage";
         } elseif (file_exists($dir."pcov.$ext")) {
             return "$php -d extension=pcov.$ext -d pcov.enabled=1 -d pcov.directory=$code";
         } elseif (file_exists($dir."xdebug.$ext")) {
-            return "$php -d zend_extension=xdebug.$ext";
+            return "$php -d zend_extension=xdebug.$ext -d xdebug.mode=coverage";
         } else {
             if (IS_WIN) {
                 $dbg = dirname(\PHP_BINARY)."\\phpdbg.exe";
diff --git a/tests/bootstrap.php b/tests/bootstrap.php
index 2e4c251..c8f3650 100644
--- a/tests/bootstrap.php
+++ b/tests/bootstrap.php
@@ -16,5 +16,9 @@ error_reporting(\E_ALL);
 require_once BASE."vendor".DIRECTORY_SEPARATOR."autoload.php";
 
 if (function_exists("xdebug_set_filter")) {
-    xdebug_set_filter(\XDEBUG_FILTER_CODE_COVERAGE, \XDEBUG_PATH_WHITELIST, [BASE."lib/"]);
+    if (defined("XDEBUG_PATH_INCLUDE")) {
+        xdebug_set_filter(\XDEBUG_FILTER_CODE_COVERAGE, XDEBUG_PATH_INCLUDE, [BASE."lib/"]);
+    } else {
+        xdebug_set_filter(\XDEBUG_FILTER_CODE_COVERAGE, XDEBUG_PATH_WHITELIST, [BASE."lib/"]);
+    }
 }