diff --git a/test/cpp/interop/xds_interop_client.cc b/test/cpp/interop/xds_interop_client.cc
index d5a6d51988c..b46926e517a 100644
--- a/test/cpp/interop/xds_interop_client.cc
+++ b/test/cpp/interop/xds_interop_client.cc
@@ -403,9 +403,10 @@ void EnableCsmObservability() {
   auto meter_provider =
       std::make_shared<opentelemetry::sdk::metrics::MeterProvider>();
   meter_provider->AddMetricReader(std::move(prometheus_exporter));
-  grpc::experimental::CsmObservabilityBuilder observability;
-  observability.SetMeterProvider(std::move(meter_provider));
-  auto status = observability.BuildAndRegister();
+  grpc::experimental::OpenTelemetryPluginBuilder()
+      .AddPluginOption(grpc::experimental::MakeCsmOpenTelemetryPluginOption())
+      .SetMeterProvider(std::move(meter_provider))
+      .BuildAndRegisterGlobal();
 }
 
 void RunServer(const int port, StatsWatchers* stats_watchers,
diff --git a/test/cpp/interop/xds_interop_server.cc b/test/cpp/interop/xds_interop_server.cc
index 9db746f7d36..0cab7527b52 100644
--- a/test/cpp/interop/xds_interop_server.cc
+++ b/test/cpp/interop/xds_interop_server.cc
@@ -54,9 +54,10 @@ void EnableCsmObservability() {
   auto meter_provider =
       std::make_shared<opentelemetry::sdk::metrics::MeterProvider>();
   meter_provider->AddMetricReader(std::move(prometheus_exporter));
-  grpc::experimental::CsmObservabilityBuilder observability;
-  observability.SetMeterProvider(std::move(meter_provider));
-  auto status = observability.BuildAndRegister();
+  grpc::experimental::OpenTelemetryPluginBuilder()
+      .AddPluginOption(grpc::experimental::MakeCsmOpenTelemetryPluginOption())
+      .SetMeterProvider(std::move(meter_provider))
+      .BuildAndRegisterGlobal();
 }
 
 int main(int argc, char** argv) {