diff --git a/core/libs/tests/GuestSystemService.cpp b/core/libs/tests/GuestSystemService.cpp
index 8a197d97b5..d0e5cae47e 100644
--- a/core/libs/tests/GuestSystemService.cpp
+++ b/core/libs/tests/GuestSystemService.cpp
@@ -52,6 +52,8 @@ void TestPlayerDialogParam() {
         threw = true;
     }
     Require(threw);
+    Require(sceSystemServiceLaunchPlayerDialog(nullptr) == SYSTEM_SERVICE_ERROR_PARAMETER);
+    Require(sceSystemServiceLaunchPlayerDialog(buffer) == SYSTEM_SERVICE_OK);
 }
 
 }