diff --git a/_coverage.php b/_coverage.php
index 929bd6a9..75db5f1f 100644
--- a/_coverage.php
+++ b/_coverage.php
@@ -24,8 +24,8 @@ if (!extension_loaded("xdebug")) {
 }
 
 if ($_GET["start"]) {
-	$_SESSION["coverage"] = array();
 	xdebug_start_code_coverage(XDEBUG_CC_UNUSED | XDEBUG_CC_DEAD_CODE);
+	$_SESSION["coverage"] = array();
 	include "./index.php";
 	header("Location: .");
 	exit;