diff --git a/.clang-tidy b/.clang-tidy
index 4cbdbcca1063f..70753b4bab264 100644
--- a/.clang-tidy
+++ b/.clang-tidy
@@ -1,6 +1,6 @@
 Checks: 'clang-diagnostic-*'
 WarningsAsErrors: '*'
-HeaderFilterRegex: '.*'
+HeaderFilterRegex: '(src|test).*'
 FormatStyle:     none
 
 # vim:tw=0