diff --git a/Source/Tests/ELFLoader.cpp b/Source/Tests/ELFLoader.cpp
index a3e5f2130..1f03bdca0 100644
--- a/Source/Tests/ELFLoader.cpp
+++ b/Source/Tests/ELFLoader.cpp
@@ -234,6 +234,14 @@ int main(int argc, char **argv, char **const envp) {
 
   FEX::HarnessHelper::ELFCodeLoader Loader{Program, LDPath(), Args, ParsedArgs, envp, &Environment};
 
+  uint32_t KernelVersion = FEX::HLE::SyscallHandler::CalculateHostKernelVersion();
+  if (KernelVersion < FEX::HLE::SyscallHandler::KernelVersion(4, 17) &&
+      !Loader.Is64BitMode()) {
+    // We require 4.17 minimum for MAP_FIXED_NOREPLACE on 32bit ELFs
+    LogMan::Msg::E("FEXLoader requires kernel 4.17 minimum");
+    return -1;
+  }
+
   FEXCore::Context::InitializeStaticTables(Loader.Is64BitMode() ? FEXCore::Context::MODE_64BIT : FEXCore::Context::MODE_32BIT);
   auto CTX = FEXCore::Context::CreateNewContext();
   FEXCore::Context::InitializeContext(CTX);
diff --git a/Source/Tests/HarnessHelpers.h b/Source/Tests/HarnessHelpers.h
index 872a68daa..07b046912 100644
--- a/Source/Tests/HarnessHelpers.h
+++ b/Source/Tests/HarnessHelpers.h
@@ -361,8 +361,8 @@ namespace FEX::HarnessHelper {
     void MapMemoryRegion() override {
       bool LimitedSize = true;
       auto DoMMap = [](uint64_t Address, size_t Size) -> void* {
-        void *Result = mmap(reinterpret_cast<void*>(Address), Size, PROT_READ | PROT_WRITE, MAP_FIXED_NOREPLACE | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
-        LogMan::Throw::A(Result != (void*)~0ULL, "mmap failed");
+        void *Result = mmap(reinterpret_cast<void*>(Address), Size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+        LogMan::Throw::A(Result == reinterpret_cast<void*>(Address), "mmap failed");
         return Result;
       };