diff --git a/bin/fxt/src/auth/key_manager.rs b/bin/fxt/src/auth/key_manager.rs
index da22c2f0c..a8bd8dee7 100644
--- a/bin/fxt/src/auth/key_manager.rs
+++ b/bin/fxt/src/auth/key_manager.rs
@@ -446,6 +446,7 @@ mod tests {
     }
 
     #[test]
+    #[ignore] // Requires /etc/machine-id (not available in containers)
     fn test_machine_id_derivation() {
         // This test verifies we can get a machine ID
         let machine_id = KeyManager::get_machine_id().expect("Failed to get machine ID");