Update mypy excludes
diff --git a/tools/mypy.ini b/tools/mypy.ini
index a9a74ec..9c662e4 100644
--- a/tools/mypy.ini
+++ b/tools/mypy.ini
@@ -6,7 +6,7 @@
# - All setup.py files (avoiding duplicate module named "setup")
# - tools/wptserve/docs/conf.py (generated code)
# - tools/wptserve/tests/ (deliberately invalid syntax)
-exclude = (^tools/third_party/|/setup\.py$|^tools/wptserve/docs/conf.py|^tools/wptserve/tests/|^tools/third_party_modified/mozlog/)
+exclude = (^tools/third_party/|/setup\.py$|^tools/wptserve/docs/conf.py|^tools/wptserve/tests/|^tools/wptserve/third_party/|^tools/third_party_modified/mozlog/)
mypy_path = tools/wptrunner:tools/wptserve:tools/webdriver:tools/webtransport
#check_untyped_defs = True
disallow_any_generics = True
