diff --git a/src/cpp/ext/filters/census/grpc_plugin.h b/src/cpp/ext/filters/census/grpc_plugin.h
index 209fad139ce..993faae0a94 100644
--- a/src/cpp/ext/filters/census/grpc_plugin.h
+++ b/src/cpp/ext/filters/census/grpc_plugin.h
@@ -22,14 +22,11 @@
 #include <grpc/support/port_platform.h>
 
 #include "absl/strings/string_view.h"
-#include "include/grpcpp/opencensus_impl.h"
+#include "include/grpcpp/opencensus.h"
 #include "opencensus/stats/stats.h"
 
-namespace grpc_impl {
-
-class ServerContext;
-}
 namespace grpc {
+class ServerContext;
 
 // The tag keys set when recording RPC stats.
 ::opencensus::stats::TagKey ClientMethodTagKey();
diff --git a/test/cpp/microbenchmarks/bm_opencensus_plugin.cc b/test/cpp/microbenchmarks/bm_opencensus_plugin.cc
index c3fa6f3031a..0b376c0a0c3 100644
--- a/test/cpp/microbenchmarks/bm_opencensus_plugin.cc
+++ b/test/cpp/microbenchmarks/bm_opencensus_plugin.cc
@@ -29,9 +29,12 @@
 #include "src/proto/grpc/testing/echo.grpc.pb.h"
 #include "test/cpp/microbenchmarks/helpers.h"
 
+using ::grpc::RegisterOpenCensusPlugin;
+using ::grpc::RegisterOpenCensusViewsForExport;
+
 absl::once_flag once;
 void RegisterOnce() {
-  absl::call_once(once, grpc::RegisterOpenCensusPlugin);
+  absl::call_once(once, RegisterOpenCensusPlugin);
 }
 
 class EchoServer final : public grpc::testing::EchoTestService::Service {
@@ -102,7 +105,7 @@ static void BM_E2eLatencyCensusEnabled(benchmark::State& state) {
   RegisterOnce();
   // This we can safely repeat, and doing so clears accumulated data to avoid
   // initialization costs varying between runs.
-  grpc::RegisterOpenCensusViewsForExport();
+  RegisterOpenCensusViewsForExport();
 
   EchoServerThread server;
   std::unique_ptr<grpc::testing::EchoTestService::Stub> stub =