diff --git a/tests/Server/TextDocument/SignatureHelpTest.php b/tests/Server/TextDocument/SignatureHelpTest.php
index 23e35d5..87eed2a 100644
--- a/tests/Server/TextDocument/SignatureHelpTest.php
+++ b/tests/Server/TextDocument/SignatureHelpTest.php
@@ -77,6 +77,8 @@ class SignatureHelpTest extends TestCase
 
         $help = new SignatureHelp;
         $help->signatures = [];
+        $help->activeSignature = 0;
+        $help->activeParameter = 1;
         $info = new SignatureInformation;
         $help->signatures[] = $info;
         $info->label = 'method(string $param = "")';