diff --git a/cmake/extensions.cmake b/cmake/extensions.cmake
index e28f416b9d..cbb640ca15 100644
--- a/cmake/extensions.cmake
+++ b/cmake/extensions.cmake
@@ -747,8 +747,17 @@ function(zephyr_check_compiler_flag lang option check)
     return()
   endif()
 
-  # Test the flag
-  check_compiler_flag(${lang} "${option}" inner_check)
+  # Flags that start with -Wno-<warning> can not be tested by
+  # check_compiler_flag, they will always pass, but -W<warning> can be
+  # tested, so to test -Wno-<warning> flags we test -W<warning>
+  # instead.
+  if("${option}" MATCHES "-Wno-(.*)")
+    set(possibly_translated_option -W${CMAKE_MATCH_1})
+  else()
+    set(possibly_translated_option ${option})
+  endif()
+
+  check_compiler_flag(${lang} "${possibly_translated_option}" inner_check)
 
   set(${check} ${inner_check} PARENT_SCOPE)