diff --git a/black.toml b/black.toml
index d9855919010..e655f7f8e7e 100644
--- a/black.toml
+++ b/black.toml
@@ -43,7 +43,7 @@ known_first_party = [
 ]
 known_third_party = ["grpc"]
 skip_glob = [
-    "third_party/*",
+    "*/third_party/*",
     "*/env/*",
     "*pb2*.py",
     "*pb2*.pyi",
diff --git a/tools/dockerfile/grpc_clang_format/clang_format_all_the_things.sh b/tools/dockerfile/grpc_clang_format/clang_format_all_the_things.sh
index 56503164a2c..96fb2237f1c 100755
--- a/tools/dockerfile/grpc_clang_format/clang_format_all_the_things.sh
+++ b/tools/dockerfile/grpc_clang_format/clang_format_all_the_things.sh
@@ -51,6 +51,7 @@ do
     -and -not -name grpc_tls_credentials_options.h \
     -and -not -name grpc_tls_credentials_options_comparator_test.cc \
     -and -not -path '*/cmake/build/*' \
+    -and -not -path '*/third_party/*' \
     `"
   done
 done