diff --git a/src/exports/fasta.rs b/src/exports/fasta.rs
index 109964a..f6e61a5 100644
--- a/src/exports/fasta.rs
+++ b/src/exports/fasta.rs
@@ -16,7 +16,7 @@ pub fn export_fasta(conn: &Connection, operation_id: i64, filename: &PathBuf) {
         let block_group = BlockGroup::get_by_id(conn, path.block_group_id);
 
         let definition = fasta::record::Definition::new(block_group.name, None);
-        let sequence = fasta::record::Sequence::from(Path::sequence(conn, path).into_bytes());
+        let sequence = fasta::record::Sequence::from(path.sequence(conn).into_bytes());
         let record = fasta::Record::new(definition, sequence);
 
         let _ = writer.write_record(&record);
diff --git a/src/exports/gfa.rs b/src/exports/gfa.rs
index 5e07122..646d89a 100644
--- a/src/exports/gfa.rs
+++ b/src/exports/gfa.rs
@@ -62,7 +62,7 @@ pub fn export_gfa(
     let boundary_edges = Edge::boundary_edges_from_sequences(&blocks);
     edges.extend(boundary_edges.clone());
 
-    let (graph, edges_by_node_pair) = Edge::build_graph(&edges, &blocks);
+    let (graph, _edges_by_node_pair) = Edge::build_graph(&edges, &blocks);
 
     let file = File::create(filename).unwrap();
     let mut writer = BufWriter::new(file);
diff --git a/src/models/edge.rs b/src/models/edge.rs
index 45ad238..5fad442 100644
--- a/src/models/edge.rs
+++ b/src/models/edge.rs
@@ -537,7 +537,7 @@ mod tests {
         block_group::{BlockGroup, PathChange},
         block_group_edge::BlockGroupEdge,
         collection::Collection,
-        path::{Path, PathBlock},
+        path::PathBlock,
         sequence::Sequence,
     };
     use crate::test_helpers::{get_connection, setup_block_group};
diff --git a/src/models/path.rs b/src/models/path.rs
index 50c24b3..028e41a 100644
--- a/src/models/path.rs
+++ b/src/models/path.rs
@@ -543,6 +543,7 @@ impl Path {
             })
             .clone()
             .collect()
+    }
 
     pub fn new_path_for(
         &self,
@@ -554,7 +555,7 @@ impl Path {
     ) -> Path {
         // Creates a new path from the current one by replacing all edges between path_start and
         // path_end with the input edges that are to and from a new node
-        let tree = Path::intervaltree_for(conn, self);
+        let tree = self.intervaltree(conn);
         let block_with_start = tree.query_point(path_start).next().unwrap().value.clone();
         let block_with_end = tree.query_point(path_end).next().unwrap().value.clone();
 
@@ -2468,4 +2469,119 @@ mod tests {
         assert_eq!(result_annotation.start, 0);
         assert_eq!(result_annotation.end, 4);
     }
+
+    #[test]
+    fn test_new_path_for() {
+        let conn = &mut get_connection(None);
+        Collection::create(conn, "test collection");
+        let block_group = BlockGroup::create(conn, "test collection", None, "test block group");
+        let sequence1 = Sequence::new()
+            .sequence_type("DNA")
+            .sequence("ATCGATCG")
+            .save(conn);
+        let node1_id = Node::create(conn, sequence1.hash.as_str(), None);
+        let edge1 = Edge::create(
+            conn,
+            PATH_START_NODE_ID,
+            -123,
+            Strand::Forward,
+            node1_id,
+            0,
+            Strand::Forward,
+            0,
+            0,
+        );
+        let sequence2 = Sequence::new()
+            .sequence_type("DNA")
+            .sequence("AAAAAAAA")
+            .save(conn);
+        let node2_id = Node::create(conn, sequence2.hash.as_str(), None);
+        let edge2 = Edge::create(
+            conn,
+            node1_id,
+            8,
+            Strand::Forward,
+            node2_id,
+            0,
+            Strand::Forward,
+            0,
+            0,
+        );
+        let edge3 = Edge::create(
+            conn,
+            node2_id,
+            8,
+            Strand::Forward,
+            PATH_END_NODE_ID,
+            -1,
+            Strand::Forward,
+            0,
+            0,
+        );
+
+        let path1 = Path::create(
+            conn,
+            "chr1",
+            block_group.id,
+            &[edge1.id, edge2.id, edge3.id],
+        );
+        assert_eq!(path1.sequence(conn), "ATCGATCGAAAAAAAA");
+
+        let sequence3 = Sequence::new()
+            .sequence_type("DNA")
+            .sequence("CCCCCCCC")
+            .save(conn);
+        let node3_id = Node::create(conn, sequence3.hash.as_str(), None);
+        let edge4 = Edge::create(
+            conn,
+            node1_id,
+            4,
+            Strand::Forward,
+            node3_id,
+            0,
+            Strand::Forward,
+            0,
+            0,
+        );
+        let edge5 = Edge::create(
+            conn,
+            node3_id,
+            8,
+            Strand::Forward,
+            node2_id,
+            3,
+            Strand::Forward,
+            0,
+            0,
+        );
+
+        let path2 = path1.new_path_for(conn, 4, 11, &edge4, &edge5);
+        assert_eq!(path2.sequence(conn), "ATCGCCCCCCCCAAAAA");
+
+        let edge6 = Edge::create(
+            conn,
+            node1_id,
+            4,
+            Strand::Forward,
+            node3_id,
+            0,
+            Strand::Forward,
+            0,
+            0,
+        );
+        let edge7 = Edge::create(
+            conn,
+            node3_id,
+            8,
+            Strand::Forward,
+            node1_id,
+            7,
+            Strand::Forward,
+            0,
+            0,
+        );
+
+        let path3 = path1.new_path_for(conn, 4, 7, &edge6, &edge7);
+        assert_eq!(path3.sequence(conn), "ATCGCCCCCCCCGAAAAAAAA");
+    }
 }
diff --git a/src/test_helpers.rs b/src/test_helpers.rs
index 61d6a22..d198fdf 100644
--- a/src/test_helpers.rs
+++ b/src/test_helpers.rs
@@ -156,14 +156,14 @@ pub fn save_graph(graph: &DiGraphMap<GraphNode, GraphEdge>, path: &str) {
     use petgraph::dot::{Config, Dot};
     use std::fs::File;
     let mut file = File::create(path).unwrap();
-    file.write_all(
+    let _ = file.write_all(
         format!(
             "{dot:?}",
             dot = Dot::with_attr_getters(
                 &graph,
                 &[Config::NodeNoLabel, Config::EdgeNoLabel],
                 &|_, (_, _, edge_weight)| format!("label = \"{}\"", edge_weight.chromosome_index),
-                &|_, (node, weight)| format!(
+                &|_, (node, _weight)| format!(
                     "label = \"{}[{}-{}]\"",
                     node.node_id, node.sequence_start, node.sequence_end
                 ),
diff --git a/src/updates/fasta.rs b/src/updates/fasta.rs
index 7015551..f9a7bea 100644
--- a/src/updates/fasta.rs
+++ b/src/updates/fasta.rs
@@ -108,7 +108,7 @@ pub fn update_with_fasta(
         phased: 0,
     };
 
-    let interval_tree = Path::intervaltree_for(conn, &path);
+    let interval_tree = path.intervaltree(conn);
     BlockGroup::insert_change(conn, &path_change, &interval_tree);
 
     let edge_to_new_node = Edge::query(