diff --git a/src/io/rsm/raft.hpp b/src/io/rsm/raft.hpp
index d3b9de49d..cde9016c2 100644
--- a/src/io/rsm/raft.hpp
+++ b/src/io/rsm/raft.hpp
@@ -187,8 +187,8 @@ concept Rsm = requires(T t, Write w)
 template <typename WriteOperation, typename ReadOperation, typename ReplicatedState, typename WriteResponseValue,
           typename ReadResponseValue>
 concept Rsm = requires(ReplicatedState state, WriteOperation w, ReadOperation r) {
-  { state.read(r) } -> std::same_as<ReadResponseValue>;
-  { state.apply(w) } -> std::same_as<WriteResponseValue>;
+  { state.Read(r) } -> std::same_as<ReadResponseValue>;
+  { state.Apply(w) } -> std::same_as<WriteResponseValue>;
 };
 
 /// Parameter           Purpose
diff --git a/tests/simulation/raft.cpp b/tests/simulation/raft.cpp
index 7cf6144fd..9182fbc8e 100644
--- a/tests/simulation/raft.cpp
+++ b/tests/simulation/raft.cpp
@@ -60,7 +60,7 @@ class TestState {
   std::map<int, int> state_;
 
  public:
-  GetResponse read(GetRequest request) {
+  GetResponse Read(GetRequest request) {
     GetResponse ret;
     if (state_.contains(request.key)) {
       ret.value = state_[request.key];
@@ -68,7 +68,7 @@ class TestState {
     return ret;
   }
 
-  CasResponse apply(CasRequest request) {
+  CasResponse Apply(CasRequest request) {
     CasResponse ret;
 
     // Key exist