diff --git a/test/io_mock.hpp b/test/io_mock.hpp
index 2cff9a8..4d18204 100644
--- a/test/io_mock.hpp
+++ b/test/io_mock.hpp
@@ -12,6 +12,8 @@
   public:
     ~HostIoInterfaceMock() = default;
 
+    MOCK_METHOD3(read, bool(const std::size_t, const std::size_t, void* const));
+
     MOCK_METHOD3(write,
                  bool(const std::size_t, const std::size_t, const void* const));
 };