diff --git a/test/mocks/test-mocks_SerialMock.h b/test/mocks/test-mocks_SerialMock.h
index a934d2f..028205d 100644
--- a/test/mocks/test-mocks_SerialMock.h
+++ b/test/mocks/test-mocks_SerialMock.h
@@ -22,6 +22,7 @@ public:
     void clear();
 
 public:
+    DataType peek() const;
     DataType read();
     void read(DataType* outData, int inSize);
 
diff --git a/test/mocks/test-mocks_SerialMock.hpp b/test/mocks/test-mocks_SerialMock.hpp
index 7855121..c0181b2 100644
--- a/test/mocks/test-mocks_SerialMock.hpp
+++ b/test/mocks/test-mocks_SerialMock.hpp
@@ -71,6 +71,12 @@ void RingBuffer<DataType, Size>::clear()
 
 // -----------------------------------------------------------------------------
 
+template<typename DataType, int Size>
+DataType RingBuffer<DataType, Size>::peek() const
+{
+    return *mReadHead;
+}
+
 template<typename DataType, int Size>
 DataType RingBuffer<DataType, Size>::read()
 {