diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3bea3710..1be49c9a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -280,12 +280,12 @@ target_compile_definitions(rtaudio PRIVATE RTAUDIO_EXPORT)
 target_link_libraries(rtaudio ${LINKLIBS})
 
 # Subdirs
-include(CTest)
 
 if (NOT DEFINED RTAUDIO_BUILD_TESTING OR RTAUDIO_BUILD_TESTING STREQUAL "")
   set(RTAUDIO_BUILD_TESTING ${BUILD_TESTING})
 endif()
 if (RTAUDIO_BUILD_TESTING)
+  include(CTest)
   add_subdirectory(tests)
 endif()