diff --git a/CMakeLists.txt b/CMakeLists.txt
index 42b6110afb..6d67eaa1d6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -604,6 +604,7 @@ include(CheckTypeSize)
 include(CheckCSourceCompiles)
 
 option(_CURL_PREFILL "Fast-track known feature detection results (Windows, some Apple)" "${WIN32}")
+mark_as_advanced(_CURL_PREFILL)
 if(_CURL_PREFILL)
   if(WIN32)
     include("${CMAKE_CURRENT_SOURCE_DIR}/CMake/win32-cache.cmake")
diff --git a/tests/certs/CMakeLists.txt b/tests/certs/CMakeLists.txt
index d0e1f55b85..ebe6fbcfa7 100644
--- a/tests/certs/CMakeLists.txt
+++ b/tests/certs/CMakeLists.txt
@@ -33,6 +33,7 @@ add_custom_command(OUTPUT ${GENERATEDCERTS}
 add_custom_target(build-certs DEPENDS ${GENERATEDCERTS})
 
 option(_CURL_SKIP_BUILD_CERTS "Skip building certs with testdeps" OFF)  # Internal option to increase perf for build tests
+mark_as_advanced(_CURL_SKIP_BUILD_CERTS)
 if(NOT _CURL_SKIP_BUILD_CERTS)
   add_dependencies(testdeps build-certs)
 endif()