diff --git a/tools/run_tests/run_tests_matrix.py b/tools/run_tests/run_tests_matrix.py
index f45bb194a1c..474b56b5de5 100755
--- a/tools/run_tests/run_tests_matrix.py
+++ b/tools/run_tests/run_tests_matrix.py
@@ -169,7 +169,7 @@ def _create_test_jobs(extra_args=[], inner_jobs=_DEFAULT_INNER_JOBS):
 
   # sanitizers
   test_jobs += _generate_jobs(languages=['c'],
-                              configs=['msan', 'asan', 'tsan'],
+                              configs=['msan', 'asan', 'tsan', 'ubsan'],
                               platforms=['linux'],
                               labels=['sanitizers'],
                               extra_args=extra_args,