diff --git a/src/csharp/Grpc.IntegrationTesting/proto/test.proto b/src/csharp/Grpc.IntegrationTesting/proto/test.proto
index f9e0d2a03962a6ba680cf603bc2433c6ef2b4f8f..5496f72af07bcb3cab6505ac21258e6ae08bac46 100644
--- a/src/csharp/Grpc.IntegrationTesting/proto/test.proto
+++ b/src/csharp/Grpc.IntegrationTesting/proto/test.proto
@@ -44,7 +44,6 @@ service TestService {
   rpc EmptyCall(grpc.testing.Empty) returns (grpc.testing.Empty);
 
   // One request followed by one response.
-  // TODO(Issue 527): Describe required server behavior.
   rpc UnaryCall(SimpleRequest) returns (SimpleResponse);
 
   // One request followed by a sequence of responses (streamed download).
diff --git a/src/node/interop/test.proto b/src/node/interop/test.proto
index d2c3f9befef6bf3e375062c353f16eb2266c66c8..24e67497fa66ba175f99eab6d0c28573eac0235d 100644
--- a/src/node/interop/test.proto
+++ b/src/node/interop/test.proto
@@ -45,7 +45,6 @@ service TestService {
   rpc EmptyCall(grpc.testing.Empty) returns (grpc.testing.Empty);
 
   // One request followed by one response.
-  // TODO(Issue 527): Describe required server behavior.
   rpc UnaryCall(SimpleRequest) returns (SimpleResponse);
 
   // One request followed by a sequence of responses (streamed download).
diff --git a/src/objective-c/examples/RemoteTestClient/test.proto b/src/objective-c/examples/RemoteTestClient/test.proto
index 2f5a5489b3dd26acec1a873645557a65e8f044d8..514c3b80955fc1c9cf97513d909df6923dd78d72 100644
--- a/src/objective-c/examples/RemoteTestClient/test.proto
+++ b/src/objective-c/examples/RemoteTestClient/test.proto
@@ -45,7 +45,6 @@ service TestService {
   rpc EmptyCall(grpc.testing.Empty) returns (grpc.testing.Empty);
 
   // One request followed by one response.
-  // TODO(Issue 527): Describe required server behavior.
   rpc UnaryCall(SimpleRequest) returns (SimpleResponse);
 
   // One request followed by a sequence of responses (streamed download).
diff --git a/src/objective-c/generated_libraries/RemoteTestClient/test.proto b/src/objective-c/generated_libraries/RemoteTestClient/test.proto
index 2f5a5489b3dd26acec1a873645557a65e8f044d8..514c3b80955fc1c9cf97513d909df6923dd78d72 100644
--- a/src/objective-c/generated_libraries/RemoteTestClient/test.proto
+++ b/src/objective-c/generated_libraries/RemoteTestClient/test.proto
@@ -45,7 +45,6 @@ service TestService {
   rpc EmptyCall(grpc.testing.Empty) returns (grpc.testing.Empty);
 
   // One request followed by one response.
-  // TODO(Issue 527): Describe required server behavior.
   rpc UnaryCall(SimpleRequest) returns (SimpleResponse);
 
   // One request followed by a sequence of responses (streamed download).
diff --git a/src/php/tests/interop/test.proto b/src/php/tests/interop/test.proto
index 39c08f3544a7758165b3fd3dabd364914ec5cc55..0d169e7f64082170b07007d03ca4a2b56ed7fe3f 100644
--- a/src/php/tests/interop/test.proto
+++ b/src/php/tests/interop/test.proto
@@ -44,7 +44,6 @@ service TestService {
   rpc EmptyCall(grpc.testing.EmptyMessage) returns (grpc.testing.EmptyMessage);
 
   // One request followed by one response.
-  // TODO(Issue 527): Describe required server behavior.
   rpc UnaryCall(SimpleRequest) returns (SimpleResponse);
 
   // One request followed by a sequence of responses (streamed download).
diff --git a/test/proto/test.proto b/test/proto/test.proto
index 92aff23929c8bbc05981e43c4436c9fc9afb1b62..d3166a6540d73961d74b3d1ea20b2760eacdcae3 100644
--- a/test/proto/test.proto
+++ b/test/proto/test.proto
@@ -45,7 +45,6 @@ service TestService {
   rpc EmptyCall(grpc.testing.Empty) returns (grpc.testing.Empty);
 
   // One request followed by one response.
-  // TODO(Issue 527): Describe required server behavior.
   rpc UnaryCall(SimpleRequest) returns (SimpleResponse);
 
   // One request followed by a sequence of responses (streamed download).