diff --git a/sled-agent/src/instance_manager.rs b/sled-agent/src/instance_manager.rs
index 2c9780b3ce..cf6563b117 100644
--- a/sled-agent/src/instance_manager.rs
+++ b/sled-agent/src/instance_manager.rs
@@ -750,7 +750,7 @@ impl InstanceTicket {
         InstanceTicket { id, terminate_tx: Some(terminate_tx) }
     }
 
-    #[cfg(test)]
+    #[cfg(all(test, target_os = "illumos"))]
     pub(crate) fn new_without_manager_for_test(id: Uuid) -> Self {
         Self { id, terminate_tx: None }
     }
diff --git a/sled-agent/src/vmm_reservoir.rs b/sled-agent/src/vmm_reservoir.rs
index d4cadcc3ec..caa1d88254 100644
--- a/sled-agent/src/vmm_reservoir.rs
+++ b/sled-agent/src/vmm_reservoir.rs
@@ -121,7 +121,7 @@ impl VmmReservoirManagerHandle {
     }
 
     /// TODO: We should be able run to tests in VMs that can use the real VmmReservoir
-    #[cfg(test)]
+    #[cfg(all(test, target_os = "illumos"))]
     pub fn stub_for_test() -> Self {
         let (tx, _) = flume::bounded(1);
         let (size_updated_tx, _) = broadcast::channel(1);