diff --git a/core/libs/prx/libSceNet/Export.cpp b/core/libs/prx/libSceNet/Export.cpp
index 19a4b22bd..7c906c033 100644
--- a/core/libs/prx/libSceNet/Export.cpp
+++ b/core/libs/prx/libSceNet/Export.cpp
@@ -49,6 +49,7 @@ constexpr int NET_ECONNABORTED = 53;
 constexpr int NET_EMSGSIZE = 40;
 constexpr int NET_ETIMEDOUT = 60;
 constexpr int NET_ECONNREFUSED = 61;
+constexpr int NET_ERROR_BASE = static_cast<int>(0x80410100u);
 constexpr int NET_ERROR_RESOLVER_ENODNS = static_cast<int>(0x804101E1u);
 
 constexpr int NET_AF_INET = 2;
@@ -212,7 +213,7 @@ int* errno_slot() {
 
 int fail(int err) {
     *errno_slot() = err;
-    return -1;
+    return NET_ERROR_BASE | err;
 }
 
 void log_soft(const char* func, const char* what) {
diff --git a/core/libs/tests/GuestSceNet.cpp b/core/libs/tests/GuestSceNet.cpp
index aae168ecc..0b5deea90 100644
--- a/core/libs/tests/GuestSceNet.cpp
+++ b/core/libs/tests/GuestSceNet.cpp
@@ -18,6 +18,8 @@ std::int64_t APS5_VABI sceNetRecv(int, void*, std::size_t, int);
 std::int64_t APS5_VABI sceNetSendto(int, const void*, std::size_t, int, const void*, std::uint32_t);
 std::int64_t APS5_VABI sceNetRecvfrom(int, void*, std::size_t, int, void*, std::uint32_t*);
 int APS5_VABI sceNetSocketClose(int);
+int APS5_VABI sceNetSetsockopt(int, int, int, const void*, std::uint32_t);
+int* APS5_VABI sceNetErrnoLoc(void);
 int APS5_VABI sceNetEpollCreate(const char*, int);
 int APS5_VABI sceNetEpollControl(int, int, int, const NetEpollEvent*);
 int APS5_VABI sceNetEpollWait(int, NetEpollEvent*, int, int);
@@ -53,6 +55,10 @@ int main() {
     address_size = peer.size();
     const int accepted = sceNetAccept(listener, peer.data(), &address_size);
     Require(accepted >= 0 && address_size == 16);
+    const int nonblocking = 1;
+    Require(sceNetSetsockopt(accepted, 0xffff, 0x1200, &nonblocking, sizeof(nonblocking)) == 0);
+    char pending = 0;
+    Require(sceNetRecv(accepted, &pending, sizeof(pending), 0) == static_cast<int>(0x80410123) && *sceNetErrnoLoc() == 35);
 
     const int epoll = sceNetEpollCreate("guest-sce-net", 0);
     Require(epoll >= 0);
@@ -73,6 +79,7 @@ int main() {
     Require(sceNetSocketClose(accepted) == 0);
     Require(sceNetSocketClose(client) == 0);
     Require(sceNetSocketClose(listener) == 0);
+    Require(sceNetSocketClose(listener) == static_cast<int>(0x80410109) && *sceNetErrnoLoc() == 9);
 
     const int udp_receiver = sceNetSocket(nullptr, 2, 2, 17);
     const int udp_sender = sceNetSocket(nullptr, 2, 2, 17);