diff --git a/examples/src/health/server.rs b/examples/src/health/server.rs
index 7b12e8668..4ae198d51 100644
--- a/examples/src/health/server.rs
+++ b/examples/src/health/server.rs
@@ -29,7 +29,7 @@ impl Greeter for MyGreeter {
 
 /// This function (somewhat improbably) flips the status of a service every second, in order
 /// that the effect of `tonic_health::HealthReporter::watch` can be easily observed.
-async fn twiddle_service_status(mut reporter: HealthReporter) {
+async fn twiddle_service_status(reporter: HealthReporter) {
     let mut iter = 0u64;
     loop {
         iter += 1;
@@ -45,7 +45,7 @@ async fn twiddle_service_status(mut reporter: HealthReporter) {
 
 #[tokio::main]
 async fn main() -> Result<(), Box<dyn std::error::Error>> {
-    let (mut health_reporter, health_service) = tonic_health::server::health_reporter();
+    let (health_reporter, health_service) = tonic_health::server::health_reporter();
     health_reporter
         .set_serving::<GreeterServer<MyGreeter>>()
         .await;
diff --git a/tonic-health/src/server.rs b/tonic-health/src/server.rs
index 7cae885ff..a512b60fd 100644
--- a/tonic-health/src/server.rs
+++ b/tonic-health/src/server.rs
@@ -48,7 +48,7 @@ impl HealthReporter {
 
     /// Sets the status of the service implemented by `S` to `Serving`. This notifies any watchers
     /// if there is a change in status.
-    pub async fn set_serving<S>(&mut self)
+    pub async fn set_serving<S>(&self)
     where
         S: NamedService,
     {
@@ -59,7 +59,7 @@ impl HealthReporter {
 
     /// Sets the status of the service implemented by `S` to `NotServing`. This notifies any watchers
     /// if there is a change in status.
-    pub async fn set_not_serving<S>(&mut self)
+    pub async fn set_not_serving<S>(&self)
     where
         S: NamedService,
     {
@@ -70,7 +70,7 @@ impl HealthReporter {
 
     /// Sets the status of the service with `service_name` to `status`. This notifies any watchers
     /// if there is a change in status.
-    pub async fn set_service_status<S>(&mut self, service_name: S, status: ServingStatus)
+    pub async fn set_service_status<S>(&self, service_name: S, status: ServingStatus)
     where
         S: AsRef<str>,
     {
@@ -220,7 +220,7 @@ mod tests {
 
     #[tokio::test]
     async fn test_service_check() {
-        let (mut reporter, service) = make_test_service().await;
+        let (reporter, service) = make_test_service().await;
 
         // Overall server health
         let resp = service