diff --git a/platforms/posix/cmake/sitl_tests.cmake b/platforms/posix/cmake/sitl_tests.cmake
index d7e7bc23342..6a0c3d15372 100644
--- a/platforms/posix/cmake/sitl_tests.cmake
+++ b/platforms/posix/cmake/sitl_tests.cmake
@@ -44,7 +44,9 @@ endif()
 
 if (CMAKE_SYSTEM_NAME STREQUAL "CYGWIN")
 	list(REMOVE_ITEM tests
+		hysteresis # Intermittent timing fails.
 		uorb
+		shutdown # A mystery why it fails.
 	)
 endif()