diff --git a/seaweed-volume/src/server/grpc_server.rs b/seaweed-volume/src/server/grpc_server.rs
index 7d36c0443..1e98ec462 100644
--- a/seaweed-volume/src/server/grpc_server.rs
+++ b/seaweed-volume/src/server/grpc_server.rs
@@ -5683,7 +5683,8 @@ impl VolumeCopyJob {
                     v.deleted_count() as u64,
                 )
             {
-                store.unmount_volume(vid);
+                // Cannot fail: mounted under this same guard, so it cannot be compacting.
+                let _ = store.unmount_volume(vid);
                 return Err(Status::internal(format!(
                     "failed to mount or validate volume {}: {}",
                     vid, e
diff --git a/seaweed-volume/src/storage/store.rs b/seaweed-volume/src/storage/store.rs
index 29d254aa9..8be0fa6b8 100644
--- a/seaweed-volume/src/storage/store.rs
+++ b/seaweed-volume/src/storage/store.rs
@@ -1216,6 +1216,7 @@ impl Store {
         found_vol.map(|v| (v, dirs))
     }
 
+    #[cfg(test)]
     pub fn delete_expired_ec_volumes(
         &mut self,
     ) -> (
@@ -1301,6 +1302,7 @@ impl Store {
     }
 
     /// Remove an EC volume from whichever location has it.
+    #[cfg(test)]
     pub fn remove_ec_volume(&mut self, vid: VolumeId) -> Option<EcVolume> {
         for loc in &mut self.locations {
             if let Some(ecv) = loc.remove_ec_volume(vid) {