diff --git a/src/test/fuzz/deserialize.cpp b/src/test/fuzz/deserialize.cpp
index 8e8ab53e38e..046bfca5024 100644
--- a/src/test/fuzz/deserialize.cpp
+++ b/src/test/fuzz/deserialize.cpp
@@ -57,14 +57,6 @@ namespace {
 struct invalid_fuzzing_input_exception : public std::exception {
 };
 
-template <typename T, typename P>
-DataStream Serialize(const T& obj, const P& params)
-{
-    DataStream ds{};
-    ds << params(obj);
-    return ds;
-}
-
 template <typename T, typename P>
 T Deserialize(DataStream&& ds, const P& params)
 {
@@ -73,17 +65,6 @@ T Deserialize(DataStream&& ds, const P& params)
     return obj;
 }
 
-template <typename T, typename P>
-void DeserializeFromFuzzingInput(FuzzBufferType buffer, T&& obj, const P& params)
-{
-    try {
-        SpanReader{buffer} >> params(obj);
-    } catch (const std::ios_base::failure&) {
-        throw invalid_fuzzing_input_exception();
-    }
-    assert(buffer.empty() || !Serialize(obj, params).empty());
-}
-
 template <typename T>
 DataStream Serialize(const T& obj)
 {
@@ -127,7 +108,7 @@ T DeserializeConstructFromFuzzingInput(FuzzBufferType buffer)
 template <typename T, typename P>
 void AssertEqualAfterSerializeDeserialize(const T& obj, const P& params)
 {
-    assert(Deserialize<T>(Serialize(obj, params), params) == obj);
+    assert(Deserialize<T>(Serialize(params(obj)), params) == obj);
 }
 template <typename T>
 void AssertEqualAfterSerializeDeserialize(const T& obj)