diff --git a/core/shader/recompiler/tests/RequestSerializerTests.cpp b/core/shader/recompiler/tests/RequestSerializerTests.cpp
index 9066ce55c..28bb1eae0 100644
--- a/core/shader/recompiler/tests/RequestSerializerTests.cpp
+++ b/core/shader/recompiler/tests/RequestSerializerTests.cpp
@@ -7,6 +7,8 @@ namespace {
 
 constexpr char kHistoricalVersion21[] =
     "NVNQQRUAAAAFAAADAAAAAAABAAAAAAAAAAAAgb8AAAAAAAAAAAAAAAAAAAAAQAAAAAgAAAADAAAAAAAAAN+bVxPgrGgk776t3gABAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAJAAAAAAAAAOQAAAAAAAAAAAAAAAAAAAAAAQEAAAEAAAAAAAAAAAAFAAAAAAAEAAAAAAAAABI0VngAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAIAAAALAAAAEAAAAEAAAAAAAAF4VjQSAQEBOTAAAAA=";
+constexpr char kVersion21WithF16Tail[] =
+    "NVNQQRUAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAQAAAAAAAAAAQA0DAAEB";
 
 void Require(bool condition) {
     if (!condition) std::abort();
@@ -20,6 +22,9 @@ int main() {
     const auto historical = serializer.Deserialize(kHistoricalVersion21);
     Require(!historical.request.target.float16DenormPreserve);
 
+    const auto version21WithTail = serializer.Deserialize(kVersion21WithF16Tail);
+    Require(version21WithTail.request.target.float16DenormPreserve);
+
     ShaderRecompiler::RecompileRequest request{};
     request.target.float16DenormPreserve = false;
     const auto withoutPreserve = serializer.Deserialize(serializer.Serialize(request));