diff --git a/android-interop-testing/app/src/main/java/io/grpc/android/integrationtest/TesterOkHttpChannelBuilder.java b/android-interop-testing/app/src/main/java/io/grpc/android/integrationtest/TesterOkHttpChannelBuilder.java
index 3f2aa7d8f7..44fcf31770 100644
--- a/android-interop-testing/app/src/main/java/io/grpc/android/integrationtest/TesterOkHttpChannelBuilder.java
+++ b/android-interop-testing/app/src/main/java/io/grpc/android/integrationtest/TesterOkHttpChannelBuilder.java
@@ -60,6 +60,7 @@ class TesterOkHttpChannelBuilder {
   public static ManagedChannel build(String host, int port, @Nullable String serverHostOverride,
       boolean useTls, @Nullable InputStream testCa, @Nullable String androidSocketFactoryTls) {
     ManagedChannelBuilder<?> channelBuilder = ManagedChannelBuilder.forAddress(host, port);
+    ((OkHttpChannelBuilder) channelBuilder).maxMessageSize(16 * 1024 * 1024);
     if (serverHostOverride != null) {
       // Force the hostname to match the cert the server uses.
       channelBuilder.overrideAuthority(serverHostOverride);
diff --git a/interop-testing/src/main/java/io/grpc/testing/integration/TestServiceServer.java b/interop-testing/src/main/java/io/grpc/testing/integration/TestServiceServer.java
index 3fe8cb6953..e76faa860d 100644
--- a/interop-testing/src/main/java/io/grpc/testing/integration/TestServiceServer.java
+++ b/interop-testing/src/main/java/io/grpc/testing/integration/TestServiceServer.java
@@ -143,6 +143,7 @@ public class TestServiceServer {
     }
     server = NettyServerBuilder.forPort(port)
         .sslContext(sslContext)
+        .maxMessageSize(16 * 1024 * 1024)
         .addService(ServerInterceptors.intercept(
             new TestServiceImpl(executor),
             TestUtils.echoRequestHeadersInterceptor(Util.METADATA_KEY)))