diff --git a/xds/src/main/java/io/grpc/xds/RoutingUtils.java b/xds/src/main/java/io/grpc/xds/RoutingUtils.java
index 4bdb72a41f..2b60e90ded 100644
--- a/xds/src/main/java/io/grpc/xds/RoutingUtils.java
+++ b/xds/src/main/java/io/grpc/xds/RoutingUtils.java
@@ -165,7 +165,8 @@ final class RoutingUtils {
     } else if (pathMatcher.prefix() != null) {
       return pathMatcher.caseSensitive()
           ? fullMethodName.startsWith(pathMatcher.prefix())
-          : fullMethodName.toLowerCase().startsWith(pathMatcher.prefix().toLowerCase());
+          : fullMethodName.toLowerCase(Locale.US).startsWith(
+              pathMatcher.prefix().toLowerCase(Locale.US));
     }
     return pathMatcher.regEx().matches(fullMethodName);
   }
diff --git a/xds/src/test/java/io/grpc/xds/orca/OrcaServiceImplTest.java b/xds/src/test/java/io/grpc/xds/orca/OrcaServiceImplTest.java
index 01e9c906bf..124a21ddb7 100644
--- a/xds/src/test/java/io/grpc/xds/orca/OrcaServiceImplTest.java
+++ b/xds/src/test/java/io/grpc/xds/orca/OrcaServiceImplTest.java
@@ -19,6 +19,7 @@ package io.grpc.xds.orca;
 import static com.google.common.truth.Truth.assertThat;
 import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.Mockito.never;
 import static org.mockito.Mockito.reset;
 import static org.mockito.Mockito.times;
 import static org.mockito.Mockito.verify;
@@ -115,7 +116,6 @@ public class OrcaServiceImplTest {
   }
 
   @Test
-  @SuppressWarnings("unchecked")
   public void testReportingLifeCycle_serverShutdown() {
     ClientCall<OrcaLoadReportRequest, OrcaLoadReport> call = channel.newCall(
         OpenRcaServiceGrpc.getStreamCoreMetricsMethod(), CallOptions.DEFAULT);
@@ -128,7 +128,7 @@ public class OrcaServiceImplTest {
     OrcaLoadReport expect = OrcaLoadReport.newBuilder().putUtilization("buffer", 0.2).build();
     assertThat(((OrcaServiceImpl)orcaServiceImpl).clientCount.get()).isEqualTo(1);
     verify(listener).onMessage(eq(expect));
-    reset(listener);
+    verify(listener, never()).onClose(any(), any());
     oobServer.shutdownNow();
     assertThat(fakeClock.forwardTime(1, TimeUnit.SECONDS)).isEqualTo(0);
     assertThat(((OrcaServiceImpl)orcaServiceImpl).clientCount.get()).isEqualTo(0);