diff --git a/tools/internal_ci/windows/grpc_basictests_dbg.cfg b/tools/internal_ci/windows/grpc_basictests_dbg.cfg
index 8e644e4c5e4..28d53cdc7bd 100644
--- a/tools/internal_ci/windows/grpc_basictests_dbg.cfg
+++ b/tools/internal_ci/windows/grpc_basictests_dbg.cfg
@@ -26,5 +26,5 @@ action {
 
 env_vars {
   key: "RUN_TESTS_FLAGS"
-  value: "-f basictests windows -j 1 --inner_jobs 8 --internal_ci --bq_result_table aggregate_results"
+  value: "-f basictests windows dbg -j 1 --inner_jobs 8 --internal_ci --bq_result_table aggregate_results"
 }