diff --git a/src/proto/server/testing.rs b/src/proto/server/testing.rs
index 6967aa2..5a5c050 100644
--- a/src/proto/server/testing.rs
+++ b/src/proto/server/testing.rs
@@ -177,6 +177,7 @@ impl ServerBuilder {
   }
 }
 
+// TODO: Rename all FakeServer* to Server*.
 /// A fake server for connecting to in tests.
 pub struct FakeServer {
   listener: TcpListener,