diff --git a/src/genetic/test.rs b/src/genetic/test.rs
index be5c251..af35e51 100644
--- a/src/genetic/test.rs
+++ b/src/genetic/test.rs
@@ -106,26 +106,11 @@ mod tests {
     fn basic_algorithm_test() {
         let towards = 10.0;
         let test_vec = vec![
-            TendUnit {
-                x: 0.3,
-                towards: towards,
-            },
-            TendUnit {
-                x: 0.1,
-                towards: towards,
-            },
-            TendUnit {
-                x: 0.7,
-                towards: towards,
-            },
-            TendUnit {
-                x: 2.3,
-                towards: towards,
-            },
-            TendUnit {
-                x: 4.3,
-                towards: towards,
-            },
+            TendUnit { x: 0.3, towards },
+            TendUnit { x: 0.1, towards },
+            TendUnit { x: 0.7, towards },
+            TendUnit { x: 2.3, towards },
+            TendUnit { x: 4.3, towards },
         ];
 
         let best_unit = Population::new(test_vec.clone())
@@ -143,16 +128,7 @@ mod tests {
     #[test]
     fn no_survivors_test() {
         let towards = 10.0;
-        let test_vec = vec![
-            TendUnit {
-                x: 0.3,
-                towards: towards,
-            },
-            TendUnit {
-                x: 0.7,
-                towards: towards,
-            },
-        ];
+        let test_vec = vec![TendUnit { x: 0.3, towards }, TendUnit { x: 0.7, towards }];
 
         let best_unit = Population::new(test_vec.clone())
             .set_size(100)
diff --git a/src/guillotine.rs b/src/guillotine.rs
index 9a24cd6..84bfb60 100644
--- a/src/guillotine.rs
+++ b/src/guillotine.rs
@@ -820,6 +820,6 @@ mod tests {
 
         stock_pieces
             .iter()
-            .for_each(|stock_piece| assert!(!bin.matches_stock_piece(&stock_piece)))
+            .for_each(|stock_piece| assert!(!bin.matches_stock_piece(stock_piece)))
     }
 }
diff --git a/src/lib.rs b/src/lib.rs
index cf72d8e..3580c9c 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -29,9 +29,10 @@ use serde::{Deserialize, Serialize};
 /// Indicates the linear direction of a pattern, grain, etc.
 #[cfg_attr(feature = "serialize", derive(Deserialize, Serialize))]
 #[cfg_attr(feature = "serialize", serde(rename_all = "camelCase"))]
-#[derive(Copy, Clone, Debug, Hash, PartialEq, Eq)]
+#[derive(Copy, Clone, Debug, Default, Hash, PartialEq, Eq)]
 pub enum PatternDirection {
     /// No pattern
+    #[default]
     None,
 
     /// Linear pattern that runs parallel to the width
@@ -52,12 +53,6 @@ impl PatternDirection {
     }
 }
 
-impl Default for PatternDirection {
-    fn default() -> Self {
-        PatternDirection::None
-    }
-}
-
 /// A rectangular piece that needs to be cut from a stock piece.
 #[cfg_attr(feature = "serialize", derive(Deserialize, Serialize))]
 #[cfg_attr(feature = "serialize", serde(rename_all = "camelCase"))]
diff --git a/src/maxrects.rs b/src/maxrects.rs
index 3770688..6e3c1de 100644
--- a/src/maxrects.rs
+++ b/src/maxrects.rs
@@ -855,6 +855,6 @@ mod tests {
 
         stock_pieces
             .iter()
-            .for_each(|stock_piece| assert!(!bin.matches_stock_piece(&stock_piece)))
+            .for_each(|stock_piece| assert!(!bin.matches_stock_piece(stock_piece)))
     }
 }
diff --git a/src/tests.rs b/src/tests.rs
index 1e89dd4..ce3d3d9 100644
--- a/src/tests.rs
+++ b/src/tests.rs
@@ -105,8 +105,8 @@ fn sanity_check_solution(solution: &Solution, num_cut_pieces: usize) {
 #[test]
 fn guillotine() {
     let solution = Optimizer::new()
-        .add_stock_pieces(STOCK_PIECES.iter().cloned().collect::<Vec<_>>())
-        .add_cut_pieces(CUT_PIECES.iter().cloned().collect::<Vec<_>>())
+        .add_stock_pieces(STOCK_PIECES.to_vec())
+        .add_cut_pieces(CUT_PIECES.to_vec())
         .set_cut_width(1)
         .set_random_seed(1)
         .optimize_guillotine(|_| {})
@@ -316,7 +316,7 @@ fn guillotine_non_fitting_cut_piece_mismatched_pattern() {
 #[test]
 fn guillotine_no_allow_mixed_stock_sizes() {
     let solution = Optimizer::new()
-        .add_stock_pieces(STOCK_PIECES.iter().cloned().collect::<Vec<_>>())
+        .add_stock_pieces(STOCK_PIECES.to_vec())
         .add_cut_piece(CutPiece {
             quantity: 1,
             external_id: Some(1),
@@ -851,8 +851,8 @@ fn guillotine_random_cut_pieces() {
 #[test]
 fn nested() {
     let solution = Optimizer::new()
-        .add_stock_pieces(STOCK_PIECES.iter().cloned().collect::<Vec<_>>())
-        .add_cut_pieces(CUT_PIECES.iter().cloned().collect::<Vec<_>>())
+        .add_stock_pieces(STOCK_PIECES.to_vec())
+        .add_cut_pieces(CUT_PIECES.to_vec())
         .set_cut_width(1)
         .set_random_seed(1)
         .optimize_nested(|_| {})
@@ -1067,7 +1067,7 @@ fn nested_non_fitting_cut_piece_mismatched_pattern() {
 #[test]
 fn nested_no_allow_mixed_stock_sizes() {
     let solution = Optimizer::new()
-        .add_stock_pieces(STOCK_PIECES.iter().cloned().collect::<Vec<_>>())
+        .add_stock_pieces(STOCK_PIECES.to_vec())
         .add_cut_piece(CutPiece {
             quantity: 1,
             external_id: Some(1),