diff --git a/src/models/frozen_graph.rs b/src/models/frozen_graph.rs
index 9e86039..a7ca9b1 100644
--- a/src/models/frozen_graph.rs
+++ b/src/models/frozen_graph.rs
@@ -255,8 +255,8 @@ impl FromGraph for FrozenGraph {
 
 #[cfg(test)]
 mod trait_tests {
-    use crate::models::AppendGraph;
     use super::FrozenGraph;
+    use crate::models::AppendGraph;
 
     crate::graph_topology_tests!(FrozenGraph);
     crate::graph_topology_clone_tests!(FrozenGraph);