diff --git a/Tests/RunCMake/Ninja/RunCMakeTest.cmake b/Tests/RunCMake/Ninja/RunCMakeTest.cmake
index 8c91b34d9d8edcb428abdfc8da3508b15ce64bf4..3f239b974d7c25ebe3f4f66e3bda1e9bd8bb62e3 100644
--- a/Tests/RunCMake/Ninja/RunCMakeTest.cmake
+++ b/Tests/RunCMake/Ninja/RunCMakeTest.cmake
@@ -18,6 +18,9 @@ else()
   message(FATAL_ERROR "'ninja --version' reported:\n${ninja_out}")
 endif()
 
+# Sanitize NINJA_STATUS since we expect default behavior.
+unset(ENV{NINJA_STATUS})
+
 if(CMAKE_HOST_WIN32)
   run_cmake(SelectCompilerWindows)
 else()
diff --git a/Tests/RunCMake/NinjaMultiConfig/RunCMakeTest.cmake b/Tests/RunCMake/NinjaMultiConfig/RunCMakeTest.cmake
index e7acbc2845cb04700676486d63eef35226a28e47..559c8f796642dd85afc708cc02aee85185d3c4dc 100644
--- a/Tests/RunCMake/NinjaMultiConfig/RunCMakeTest.cmake
+++ b/Tests/RunCMake/NinjaMultiConfig/RunCMakeTest.cmake
@@ -5,6 +5,9 @@ include(RunCMake)
 set(RunCMake_GENERATOR "Ninja Multi-Config")
 set(RunCMake_GENERATOR_IS_MULTI_CONFIG 1)
 
+# Sanitize NINJA_STATUS since we expect default behavior.
+unset(ENV{NINJA_STATUS})
+
 function(check_files dir)
   cmake_parse_arguments(_check_files "" "" "INCLUDE;EXCLUDE" ${ARGN})