diff --git a/core/libs/tests/GuestSocialScreenDialog.cpp b/core/libs/tests/GuestSocialScreenDialog.cpp
index c86884d5f1..40138bb298 100644
--- a/core/libs/tests/GuestSocialScreenDialog.cpp
+++ b/core/libs/tests/GuestSocialScreenDialog.cpp
@@ -2,6 +2,7 @@
 #include "prx/libc/include/general/VabiMacros.hpp"
 #include <cstdint>
 #include <cstdlib>
+#include <cstring>
 
 namespace {
 
@@ -15,12 +16,14 @@ constexpr int kErrAlreadyInitialized = static_cast<int>(0x80B80004);
 constexpr int kErrNotFinished = static_cast<int>(0x80B80005);
 constexpr int kErrArgNull = static_cast<int>(0x80B8000D);
 constexpr int kResultUserCanceled = 1;
+constexpr std::int32_t kSentinel = static_cast<std::int32_t>(0x5a5a5a5a);
 
 }
 
 int main() {
     std::int64_t param = 0;
-    std::int32_t result[2] = {-1, -1};
+    std::int32_t result[2];
+    std::memset(result, 0x5a, sizeof(result));
 
     Require(sceSocialScreenDialogTerminate() == kErrNotInitialized);
     Require(sceSocialScreenDialogOpen(nullptr) == kErrNotInitialized);
@@ -37,7 +40,11 @@ int main() {
     Require(sceSocialScreenDialogUpdateStatus() == kStatusInitialized);
 
     Require(sceSocialScreenDialogOpen(nullptr) == kErrArgNull);
+    std::memset(result, 0x5a, sizeof(result));
+    Require(sceSocialScreenDialogGetResult(nullptr) == kErrArgNull);
     Require(sceSocialScreenDialogGetResult(result) == kErrNotFinished);
+    Require(result[0] == kSentinel);
+    Require(result[1] == kSentinel);
 
     Require(sceSocialScreenDialogOpen(&param) == 0);
     Require(sceSocialScreenDialogGetStatus() == kStatusFinished);
@@ -46,7 +53,7 @@ int main() {
     Require(sceSocialScreenDialogGetResult(nullptr) == kErrArgNull);
     Require(sceSocialScreenDialogGetResult(result) == 0);
     Require(result[0] == kResultUserCanceled);
-    Require(result[1] == -1);
+    Require(result[1] == kSentinel);
 
     Require(sceSocialScreenDialogClose() == 0);
     Require(sceSocialScreenDialogTerminate() == 0);
@@ -60,9 +67,10 @@ int main() {
     Require(sceSocialScreenDialogUpdateStatus() == kStatusInitialized);
     Require(sceSocialScreenDialogClose() == 0);
     Require(sceSocialScreenDialogUpdateStatus() == kStatusFinished);
-    result[0] = -1;
+    std::memset(result, 0x5a, sizeof(result));
     Require(sceSocialScreenDialogGetResult(result) == 0);
     Require(result[0] == kResultUserCanceled);
+    Require(result[1] == kSentinel);
     Require(sceSocialScreenDialogTerminate() == 0);
     Require(sceSocialScreenDialogTerminate() == kErrNotInitialized);
     Require(sceSocialScreenDialogOpen(nullptr) == kErrNotInitialized);
diff --git a/docs/dev/debt/libSceSocialScreenDialog.md b/docs/dev/debt/libSceSocialScreenDialog.md
index b1b16a216d..69c053996f 100644
--- a/docs/dev/debt/libSceSocialScreenDialog.md
+++ b/docs/dev/debt/libSceSocialScreenDialog.md
@@ -2,4 +2,4 @@
 
 ### Silent stubs
 
-- [libSceSocialScreenDialog](../../../core/libs/prx/libSceSocialScreenDialog/Export.cpp) - the social screen dialog runs the common-dialog state machine but shows nothing and reports the user as having cancelled, as there is no second-screen viewer. The signatures are from [Orbital's type database](https://github.com/AlexAltea/orbital/blob/b321fcdbd700cc02da1cb1ad25412781d5ec73c6/tools/ida/db_types.json); the result layout beyond the leading `int32_t` result code is not known, so nothing else is written.
+- [libSceSocialScreenDialog](../../../core/libs/prx/libSceSocialScreenDialog/Export.cpp) - the social screen dialog runs the common-dialog state machine but shows nothing and reports the user as having cancelled, as there is no second-screen viewer. In `sceSocialScreenDialogGetResult`, PS5 firmware 13.42 module disassembly (offset 0x360) and native execution data confirm that a null result pointer is checked before NOT_FINISHED (returning COMMON_DIALOG_ERROR_ARG_NULL). The signatures are from [Orbital's type database](https://github.com/AlexAltea/orbital/blob/b321fcdbd700cc02da1cb1ad25412781d5ec73c6/tools/ida/db_types.json); the result layout beyond the leading `int32_t` result code is not known, so nothing else is written.