diff --git a/src/baseline.rs b/src/baseline.rs
index 14afb829..b8d97535 100644
--- a/src/baseline.rs
+++ b/src/baseline.rs
@@ -580,7 +580,7 @@ mod tests {
     fn write_and_load_roundtrip() {
         let d = with_verdict(make_diag("src/a.py", 1, "py.sqli"), VerifyStatus::Confirmed);
         let tmp = tempfile::NamedTempFile::new().unwrap();
-        write_baseline(tmp.path(), &[d.clone()]).unwrap();
+        write_baseline(tmp.path(), std::slice::from_ref(&d)).unwrap();
         let loaded = load_baseline(tmp.path()).unwrap();
         assert_eq!(loaded.len(), 1);
         assert_eq!(loaded[0].stable_hash, d.stable_hash);
diff --git a/src/chain/edges.rs b/src/chain/edges.rs
index 3e4e47f4..2315863f 100644
--- a/src/chain/edges.rs
+++ b/src/chain/edges.rs
@@ -340,7 +340,7 @@ mod tests {
         let d = diag_with_cap("helper.py", 10, Cap::CODE_EXEC);
 
         // Without reach: file-local lookup leaves the finding Unreachable.
-        let edges = findings_to_edges(&[d.clone()], &surface);
+        let edges = findings_to_edges(std::slice::from_ref(&d), &surface);
         assert!(matches!(edges[0].reach, Reach::Unreachable));
 
         // With reach: transitive caller in `routes.py` lifts to Reachable.
diff --git a/src/chain/search.rs b/src/chain/search.rs
index 271a0393..7f764115 100644
--- a/src/chain/search.rs
+++ b/src/chain/search.rs
@@ -625,10 +625,10 @@ mod tests {
             Feasibility::Confirmed,
         );
         let cfg = ChainSearchConfig::default();
-        let first = find_chains(&[e.clone()], &surface, cfg);
+        let first = find_chains(std::slice::from_ref(&e), &surface, cfg);
         let first_hashes: Vec<u64> = first.iter().map(|c| c.stable_hash).collect();
         for _ in 0..9 {
-            let again = find_chains(&[e.clone()], &surface, cfg);
+            let again = find_chains(std::slice::from_ref(&e), &surface, cfg);
             let again_hashes: Vec<u64> = again.iter().map(|c| c.stable_hash).collect();
             assert_eq!(again_hashes, first_hashes);
         }