diff --git a/proto/src/server/testing.rs b/proto/src/server/testing.rs
index f332edd..aed1ca1 100644
--- a/proto/src/server/testing.rs
+++ b/proto/src/server/testing.rs
@@ -364,6 +364,16 @@ impl RequestHandler for LogHandler {
   }
 }
 
+pub struct LogHandlerFactory;
+
+impl ClientHandlerFactory for LogHandlerFactory {
+  type Handler = LogHandler;
+
+  fn make(&self) -> Self::Handler {
+    LogHandler
+  }
+}
+
 // USER STATUS HANDLER
 
 /// A map of user names to user status responses to serve.
@@ -453,7 +463,9 @@ impl UserStatusHandlerFactory {
 mod tests {
   use tokio::net::TcpStream;
 
-  use super::{ServerBuilder, ShutdownType, UserStatusHandlerFactory};
+  use super::{
+    LogHandlerFactory, ServerBuilder, ShutdownType, UserStatusHandlerFactory,
+  };
 
   // Enable capturing logs in tests.
   fn init() {
@@ -465,10 +477,7 @@ mod tests {
     init();
 
     let (server, handle) =
-      ServerBuilder::new(UserStatusHandlerFactory::default())
-        .bind()
-        .await
-        .unwrap();
+      ServerBuilder::new(LogHandlerFactory).bind().await.unwrap();
     assert!(server.address().unwrap().ip().is_loopback());
     assert_eq!(server.address().unwrap(), handle.address());
   }
@@ -478,10 +487,7 @@ mod tests {
     init();
 
     let (server, handle) =
-      ServerBuilder::new(UserStatusHandlerFactory::default())
-        .bind()
-        .await
-        .unwrap();
+      ServerBuilder::new(LogHandlerFactory).bind().await.unwrap();
     let server_task = tokio::spawn(server.serve());
 
     // The connection succeeds.
@@ -501,10 +507,7 @@ mod tests {
     init();
 
     let (mut server, handle) =
-      ServerBuilder::new(UserStatusHandlerFactory::default())
-        .bind()
-        .await
-        .unwrap();
+      ServerBuilder::new(LogHandlerFactory).bind().await.unwrap();
 
     // The connection is accepted, then immediately closed.
     let address = handle.address();