diff --git a/src/php/tests/interop/interop_client.php b/src/php/tests/interop/interop_client.php
index e3c234e8695..92a27d17aad 100755
--- a/src/php/tests/interop/interop_client.php
+++ b/src/php/tests/interop/interop_client.php
@@ -446,6 +446,45 @@ function customMetadata($stub)
                $ECHO_TRAILING_VALUE, 'Incorrect trailing metadata value');
 }
 
+function statusCodeAndMessage($stub)
+{
+    $echo_status = new grpc\testing\EchoStatus();
+    $echo_status->setCode(2);
+    $echo_status->setMessage("test status message");
+
+    $request = new grpc\testing\SimpleRequest();
+    $request->setResponseStatus($echo_status);
+
+    $call = $stub->UnaryCall($request);
+    list($result, $status) = $call->wait();
+
+    hardAssert($status->code === 2,
+               'Received unexpected status code');
+    hardAssert($status->details === "test status message",
+               'Received unexpected status details');
+
+    $streaming_call = $stub->FullDuplexCall();
+
+    $streaming_request = new grpc\testing\StreamingOutputCallRequest();
+    $streaming_request->setResponseStatus($echo_status);
+    $streaming_call->write($streaming_request);
+    $streaming_call->writesDone();
+
+    $status = $streaming_call->getStatus();
+    hardAssert($status->code === 2,
+               'Received unexpected status code');
+    hardAssert($status->details === "test status message",
+               'Received unexpected status details');
+}
+
+function unimplementedMethod($stub)
+{
+    $call = $stub->UnimplementedCall(new grpc\testing\EmptyMessage());
+    list($result, $status) = $call->wait();
+    hardAssert($status->code === Grpc\STATUS_UNIMPLEMENTED,
+               'Received unexpected status code');
+}
+
 function _makeStub($args)
 {
     if (!array_key_exists('server_host', $args)) {
@@ -575,6 +614,12 @@ function interop_main($args, $stub = false)
         case 'custom_metadata':
             customMetadata($stub);
             break;
+        case 'status_code_and_message':
+            statusCodeAndMessage($stub);
+            break;
+        case 'unimplemented_method':
+            unimplementedMethod($stub);
+            break;
         case 'service_account_creds':
             serviceAccountCreds($stub, $args);
             break;
diff --git a/src/php/tests/interop/messages.proto b/src/php/tests/interop/messages.proto
index de0b1a23205..44e3c3b8f97 100644
--- a/src/php/tests/interop/messages.proto
+++ b/src/php/tests/interop/messages.proto
@@ -1,5 +1,5 @@
 
-// Copyright 2015, Google Inc.
+// Copyright 2015-2016, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
@@ -41,9 +41,6 @@ enum PayloadType {
 
   // Uncompressable binary format.
   UNCOMPRESSABLE = 1;
-
-  // Randomly chosen from all other formats defined in this enum.
-  RANDOM = 2;
 }
 
 // A block of data, to simply increase gRPC message size.
@@ -54,6 +51,13 @@ message Payload {
   optional bytes body = 2;
 }
 
+// A protobuf representation for grpc status. This is used by test
+// clients to specify a status that the server should attempt to return.
+message EchoStatus {
+  optional int32 code = 1;
+  optional string message = 2;
+}
+
 // Unary request.
 message SimpleRequest {
   // Desired payload type in the response from the server.
@@ -72,6 +76,12 @@ message SimpleRequest {
 
   // Whether SimpleResponse should include OAuth scope.
   optional bool fill_oauth_scope = 5;
+
+  // Whether to request the server to compress the response.
+  optional bool request_compressed_response = 6;
+
+  // Whether server should return a given status
+  optional EchoStatus response_status = 7;
 }
 
 // Unary response, as configured by the request.
@@ -123,6 +133,12 @@ message StreamingOutputCallRequest {
 
   // Optional input payload sent along with the request.
   optional Payload payload = 3;
+
+  // Whether to request the server to compress the response.
+  optional bool request_compressed_response = 6;
+
+  // Whether server should return a given status
+  optional EchoStatus response_status = 7;
 }
 
 // Server-streaming response, as configured by the request and parameters.
@@ -130,3 +146,17 @@ message StreamingOutputCallResponse {
   // Payload to increase response size.
   optional Payload payload = 1;
 }
+
+// For reconnect interop test only.
+// Client tells server what reconnection parameters it used.
+message ReconnectParams {
+  optional int32 max_reconnect_backoff_ms = 1;
+}
+
+// For reconnect interop test only.
+// Server tells client whether its reconnects are following the spec and the
+// reconnect backoffs it saw.
+message ReconnectInfo {
+  optional bool passed = 1;
+  repeated int32 backoff_ms = 2;
+}
diff --git a/src/php/tests/interop/test.proto b/src/php/tests/interop/test.proto
index 0d169e7f640..da03237a936 100644
--- a/src/php/tests/interop/test.proto
+++ b/src/php/tests/interop/test.proto
@@ -68,4 +68,7 @@ service TestService {
   // first request.
   rpc HalfDuplexCall(stream StreamingOutputCallRequest)
       returns (stream StreamingOutputCallResponse);
+
+  // An unimplemented method on the server
+  rpc UnimplementedCall(grpc.testing.EmptyMessage) returns (grpc.testing.EmptyMessage);
 }