diff --git a/CMakeLists.txt b/CMakeLists.txt
index f9daeac5..767f8b52 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -17,9 +17,6 @@ if(NOT CMAKE_BUILD_TYPE)
       FORCE)
 endif(NOT CMAKE_BUILD_TYPE)
 
-# BUILD_TESTING is a standard CMake variable, but we declare it here to make it
-# prominent in the GUI.
-option(BUILD_TESTING "Enable test (depends on googletest)." OFF)
 # BUILD_SHARED_LIBS is a standard CMake variable, but we declare it here to make
 # it prominent in the GUI.
 # cpu_features uses bit-fields which are - to some extends - implementation-defined (see https://en.cppreference.com/w/c/language/bit_field).