diff --git a/manager/lamptest/lamptest.cpp b/manager/lamptest/lamptest.cpp
index f91a085..f7f9e90 100644
--- a/manager/lamptest/lamptest.cpp
+++ b/manager/lamptest/lamptest.cpp
@@ -246,7 +246,7 @@
 void LampTest::timeOutHandler()
 {
     // set the Asserted property of lamp test to false
-    if (!groupObj)
+    if (groupObj == nullptr)
     {
         lg2::error("the Group object is nullptr");
         throw std::runtime_error("the Group object is nullptr");