diff --git a/CMakeLists.txt b/CMakeLists.txt
index d72d98b..69ea6a8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -17,7 +17,6 @@ option(CPPAST_ENABLE_PRECONDITION_CHECKS "whether or not to enable precondition
 option(CPPAST_BUILD_TEST "whether or not to build the tests" OFF)
 option(CPPAST_BUILD_EXAMPLE "whether or not to build the examples" OFF)
 option(CPPAST_BUILD_TOOL "whether or not to build the tool" OFF)
-option(BUILD_TESTING "build test" OFF) # The ctest variable for building tests
 
 if(${CPPAST_BUILD_TEST} OR (CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_SOURCE_DIR))
     set(build_test ON)