diff --git a/euler/src/lib.rs b/euler/src/lib.rs
index 4394c2a..1811856 100644
--- a/euler/src/lib.rs
+++ b/euler/src/lib.rs
@@ -748,11 +748,11 @@ impl std::fmt::Debug for BoundaryCharacteristic {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         match self {
             Self::This => write!(f, "This"),
-            Self::Grid(g) => write!(f, "Grid({})", g),
-            Self::Vortex(vp) => write!(f, "{:?}", vp),
+            Self::Grid(g) => write!(f, "Grid({g})"),
+            Self::Vortex(vp) => write!(f, "{vp:?}"),
             Self::Eval(_) => write!(f, "Eval"),
             Self::Interpolate(_, _) => write!(f, "Interpolate"),
-            Self::MultiGrid(m) => write!(f, "Multigrid: {:?}", m),
+            Self::MultiGrid(m) => write!(f, "Multigrid: {m:?}"),
         }
     }
 }
diff --git a/multigrid/src/input.rs b/multigrid/src/input.rs
index 3319e18..faa9029 100644
--- a/multigrid/src/input.rs
+++ b/multigrid/src/input.rs
@@ -117,10 +117,10 @@ pub enum InterpolationOperator {
     NineH2,
 }
 
-impl Into<Box<dyn sbp::operators::InterpolationOperator>> for InterpolationOperator {
-    fn into(self) -> Box<dyn sbp::operators::InterpolationOperator> {
+impl From<InterpolationOperator> for Box<dyn sbp::operators::InterpolationOperator> {
+    fn from(val: InterpolationOperator) -> Self {
         use sbp::operators::{Interpolation4, Interpolation8, Interpolation9, Interpolation9h2};
-        match self {
+        match val {
             InterpolationOperator::Four => Box::new(Interpolation4),
             InterpolationOperator::Eight => Box::new(Interpolation8),
             InterpolationOperator::Nine => Box::new(Interpolation9),
diff --git a/multigrid/src/main.rs b/multigrid/src/main.rs
index 43d7a7e..487ab58 100644
--- a/multigrid/src/main.rs
+++ b/multigrid/src/main.rs
@@ -56,13 +56,13 @@ fn main() {
     let config: input::Configuration = match json5::from_str(&filecontents) {
         Ok(config) => config,
         Err(e) => {
-            eprintln!("Configuration could not be read: {}", e);
+            eprintln!("Configuration could not be read: {e}");
             if let json5::Error::Message {
                 location: Some(location),
                 ..
             } = e
             {
-                eprintln!("\t{:?}", location);
+                eprintln!("\t{location:?}");
             }
             return;
         }
@@ -157,7 +157,7 @@ fn main() {
             println!("Time elapsed: {} seconds", duration.as_secs_f64());
         }
         if let Some(error) = outinfo.error {
-            println!("Total error: {:e}", error);
+            println!("Total error: {error:e}");
         }
     }
 }
diff --git a/multigrid/src/parsing.rs b/multigrid/src/parsing.rs
index 035ff70..29776e8 100644
--- a/multigrid/src/parsing.rs
+++ b/multigrid/src/parsing.rs
@@ -139,12 +139,12 @@ impl input::Configuration {
                 let xi = operators.xi.unwrap_or_else(|| {
                     default_operators
                         .xi
-                        .unwrap_or_else(|| panic!("No xi operator found for grid: {}", name))
+                        .unwrap_or_else(|| panic!("No xi operator found for grid: {name}"))
                 });
                 let eta = operators.eta.unwrap_or_else(|| {
                     default_operators
                         .eta
-                        .unwrap_or_else(|| panic!("No eta operator found for grid: {}", name))
+                        .unwrap_or_else(|| panic!("No eta operator found for grid: {name}"))
                 });
 
                 use input::Operator as op;
@@ -183,9 +183,8 @@ impl input::Configuration {
                             BoundaryConditions::Expressions(expr) => {
                                 euler::BoundaryCharacteristic::Eval(expr.clone() )
                             }
-                            _ => panic!(
-                                "Boundary conditions are not available, but needed for grid {}",
-                                name
+                            BoundaryConditions::NotNeeded => panic!(
+                                "Boundary conditions are not available, but needed for grid {name}"
                             ),
                         },
                         Some(BoundaryType::This) => euler::BoundaryCharacteristic::This,
@@ -193,7 +192,7 @@ impl input::Configuration {
                             if let BoundaryConditions::Vortex(vortex) = &boundary_conditions {
                                 vortex.clone()
                             } else {
-                                panic!("Wanted vortex boundary conditions not found, needed for grid {}", name)
+                                panic!("Wanted vortex boundary conditions not found, needed for grid {name}")
                             },
                         ),
                         Some(BoundaryType::Neighbour(name)) => {
diff --git a/multigrid/src/system.rs b/multigrid/src/system.rs
index 4779fd1..44c25bb 100644
--- a/multigrid/src/system.rs
+++ b/multigrid/src/system.rs
@@ -200,7 +200,7 @@ impl BaseSystem {
             .zip(push)
             .enumerate()
         {
-            let builder = std::thread::Builder::new().name(format!("mg: {}", name));
+            let builder = std::thread::Builder::new().name(format!("mg: {name}"));
 
             let boundary_conditions = bt.map(|bt| match bt {
                 euler::BoundaryCharacteristic::This => DistributedBoundaryConditions::This,
@@ -444,7 +444,7 @@ impl System {
                 for _ in 0..sys.sys.len() {
                     e += match sys.recv.recv().unwrap() {
                         (_, MsgToHost::Error(e)) => e,
-                        (_, m) => panic!("Unexpected message: {:?}", m),
+                        (_, m) => panic!("Unexpected message: {m:?}"),
                     }
                 }
                 e
diff --git a/utils/constmatrix/src/lib.rs b/utils/constmatrix/src/lib.rs
index 91c5526..7e19022 100644
--- a/utils/constmatrix/src/lib.rs
+++ b/utils/constmatrix/src/lib.rs
@@ -258,7 +258,7 @@ mod approx {
         fn default_epsilon() -> Self::Epsilon {
             T::default_epsilon()
         }
-        fn abs_diff_eq(&self, other: &Self, epsilon: Self::Epsilon) -> bool {
+        fn abs_diff_eq(&self, other: &Self, _epsilon: Self::Epsilon) -> bool {
             self.iter()
                 .zip(other.iter())
                 .all(|(r, l)| r.abs_diff_eq(l, T::default_epsilon()))