Add tools/internal_ci/ to test filter
diff --git a/tools/run_tests/python_utils/filter_pull_request_tests.py b/tools/run_tests/python_utils/filter_pull_request_tests.py
index ca1d6d4..3734f02 100644
--- a/tools/run_tests/python_utils/filter_pull_request_tests.py
+++ b/tools/run_tests/python_utils/filter_pull_request_tests.py
@@ -98,6 +98,7 @@
'^test/distrib/php/': [_PHP_TEST_SUITE],
'^test/distrib/python/': [_PYTHON_TEST_SUITE],
'^test/distrib/ruby/': [_RUBY_TEST_SUITE],
+ '^tools/internal_ci/': [],
'^vsprojects/': [_WINDOWS_TEST_SUITE],
'binding\.gyp$': [_NODE_TEST_SUITE],
'composer\.json$': [_PHP_TEST_SUITE],