diff --git a/test/cpp/microbenchmarks/bm_cq_multiple_threads.cc b/test/cpp/microbenchmarks/bm_cq_multiple_threads.cc
index 66bc5d8..d33991d 100644
--- a/test/cpp/microbenchmarks/bm_cq_multiple_threads.cc
+++ b/test/cpp/microbenchmarks/bm_cq_multiple_threads.cc
@@ -162,7 +162,7 @@ static void teardown() {
 */
 static void BM_Cq_Throughput(benchmark::State& state) {
   gpr_timespec deadline = gpr_inf_future(GPR_CLOCK_MONOTONIC);
-  auto thd_idx = state.thread_index;
+  auto thd_idx = state.thread_index();
 
   gpr_mu_lock(&g_mu);
   g_threads_active++;
diff --git a/test/cpp/microbenchmarks/bm_threadpool.cc b/test/cpp/microbenchmarks/bm_threadpool.cc
index dd57bce..82cd08e 100644
--- a/test/cpp/microbenchmarks/bm_threadpool.cc
+++ b/test/cpp/microbenchmarks/bm_threadpool.cc
@@ -153,11 +153,11 @@ class SuicideFunctorForAdd : public grpc_completion_queue_functor {
 static void BM_ThreadPoolExternalAdd(benchmark::State& state) {
   static grpc_core::ThreadPool* external_add_pool = nullptr;
   // Setup for each run of test.
-  if (state.thread_index == 0) {
+  if (state.thread_index() == 0) {
     const int num_threads = state.range(1);
     external_add_pool = new grpc_core::ThreadPool(num_threads);
   }
-  const int num_iterations = state.range(0) / state.threads;
+  const int num_iterations = state.range(0) / state.threads();
   while (state.KeepRunningBatch(num_iterations)) {
     BlockingCounter counter(num_iterations);
     for (int i = 0; i < num_iterations; ++i) {
@@ -167,7 +167,7 @@ static void BM_ThreadPoolExternalAdd(benchmark::State& state) {
   }
 
   // Teardown at the end of each test run.
-  if (state.thread_index == 0) {
+  if (state.thread_index() == 0) {
     state.SetItemsProcessed(state.range(0));
     delete external_add_pool;
   }