diff --git a/tools/ci/cpp_check.py b/tools/ci/cpp_check.py
index 5e7e1005257..4aaac03e395 100644
--- a/tools/ci/cpp_check.py
+++ b/tools/ci/cpp_check.py
@@ -33,6 +33,7 @@ def check(self):
                     '-I thread/components/finsh',
                     # it's okay because CI will do the real compilation to check this
                     '--suppress=syntaxError',
+                    '--check-level=exhaustive',
                     '--enable=warning',
                     'performance',
                     'portability',