diff --git a/.clang-tidy b/.clang-tidy
index ebf09e31a09..30c2c87ad27 100644
--- a/.clang-tidy
+++ b/.clang-tidy
@@ -1 +1,2 @@
 Checks: 'bugprone-*,-bugprone-easily-swappable-parameters,-bugprone-virtual-near-miss,-bugprone-suspicious-include'
+HeaderFilterRegex: ''
diff --git a/external/.clang-tidy b/external/.clang-tidy
new file mode 100644
index 00000000000..05d9ccc2663
--- /dev/null
+++ b/external/.clang-tidy
@@ -0,0 +1,4 @@
+# clang-tidy does not allow easy deactivation of a directory.
+# Use a dummy .clang-tidy file that disables all clang-tidy checks except one that will never match.
+# This one check is necessary; clang-tidy reports an error when no checks are enabled.
+Checks: '-*,llvm-twine-local'