diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9085a40..e3a885e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -10,7 +10,7 @@ endif()
 
 set(LIBS_DIR ${CMAKE_CURRENT_BINARY_DIR}/libs)
 set(EIGEN_MATIO_URL https://raw.githubusercontent.com/tbeu/eigen-matio/master/MATio)
-set(EIGEN_MATIO_DIR ${LIBS_DIR}/include)
+set(EIGEN_MATIO_DIR "${LIBS_DIR}/include" CACHE FILEPATH "Directory of the MATio C++ header")
 set(EIGEN_MATIO_DEST ${EIGEN_MATIO_DIR}/MATio)
 if(NOT EXISTS EIGEN_MATIO_DEST)
   file(DOWNLOAD ${EIGEN_MATIO_URL} ${EIGEN_MATIO_DEST})
@@ -27,4 +27,3 @@ target_compile_features(${EXAMPLE_LIB_NAME} PUBLIC cxx_std_17)
 set_target_properties(${EXAMPLE_LIB_NAME} PROPERTIES CXX_EXTENSIONS OFF)
 
 enable_testing()
-add_subdirectory(test)