diff --git a/compiler/passes/src/type_checking/checker.rs b/compiler/passes/src/type_checking/checker.rs
index e21180cda4..e567f06ed8 100644
--- a/compiler/passes/src/type_checking/checker.rs
+++ b/compiler/passes/src/type_checking/checker.rs
@@ -1179,7 +1179,7 @@ impl<'a, N: Network> TypeChecker<'a, N> {
         }
 
         // Type check the function's parameters.
-        function.input.iter().enumerate().for_each(|(_index, input_var)| {
+        function.input.iter().for_each(|input_var| {
             // Check that the type of input parameter is defined.
             self.assert_type_is_valid(input_var.type_(), input_var.span());
             // Check that the type of the input parameter is not a tuple.
diff --git a/compiler/span/src/span.rs b/compiler/span/src/span.rs
index 1c0cedb168..f3780b1d4d 100644
--- a/compiler/span/src/span.rs
+++ b/compiler/span/src/span.rs
@@ -18,7 +18,7 @@
 
 use core::ops::{Add, Sub};
 use serde::{Deserialize, Serialize};
-use std::{fmt, usize};
+use std::fmt;
 
 use crate::symbol::with_session_globals;
 
diff --git a/docs/grammar/src/main.rs b/docs/grammar/src/main.rs
index 5d13b45ec2..220ba10a0b 100644
--- a/docs/grammar/src/main.rs
+++ b/docs/grammar/src/main.rs
@@ -113,7 +113,7 @@ impl<'a> Processor<'a> {
                     let def = def.trim();
 
                     // try to find rule matching definition or fail
-                    let rule = self.rules.get(&def.to_string()).cloned().unwrap();
+                    let rule = self.rules.get(def).cloned().unwrap();
 
                     self.enter_scope(Scope::Definition(rule));
                 }
diff --git a/leo/cli/helpers/logger.rs b/leo/cli/helpers/logger.rs
index 0edafed086..a5ee6f6c13 100644
--- a/leo/cli/helpers/logger.rs
+++ b/leo/cli/helpers/logger.rs
@@ -40,35 +40,6 @@ pub struct Format<F = Full, T = SystemTime> {
 }
 
 impl<F, T> Format<F, T> {
-    /// Use the full JSON format.
-    ///
-    /// The full format includes fields from all entered spans.
-    ///
-    /// # Example Output
-    ///
-    /// ```ignore,json
-    /// {"timestamp":"Feb 20 11:28:15.096","level":"INFO","target":"mycrate","fields":{"message":"some message", "key": "value"}}
-    /// ```
-    ///
-    /// # Options
-    ///
-    /// - [`Format::flatten_event`] can be used to enable flattening event fields into the root
-    /// object.
-    ///
-    /// [`Format::flatten_event`]: #method.flatten_event
-    #[cfg(feature = "json")]
-    pub fn json(self) -> Format<Json, T> {
-        Format {
-            format: Json::default(),
-            timer: self.timer,
-            ansi: self.ansi,
-            display_target: self.display_target,
-            display_level: self.display_level,
-            display_thread_id: self.display_thread_id,
-            display_thread_name: self.display_thread_name,
-        }
-    }
-
     /// Use the given [`timer`] for log message timestamps.
     ///
     /// See [`time`] for the provided timer implementations.
diff --git a/leo/package/src/root/env.rs b/leo/package/src/root/env.rs
index 483f05c1c8..44c8d47131 100644
--- a/leo/package/src/root/env.rs
+++ b/leo/package/src/root/env.rs
@@ -22,7 +22,7 @@ use snarkvm::console::account::PrivateKey;
 use snarkvm::prelude::{MainnetV0, Network, TestnetV0};
 
 use serde::Deserialize;
-use std::{borrow::Cow, fs::File, io::Write, path::Path};
+use std::{borrow::Cow, fmt, fs::File, io::Write, path::Path};
 
 pub static ENV_FILENAME: &str = ".env";
 
@@ -67,15 +67,15 @@ impl<N: Network> Env<N> {
     }
 }
 
-impl<N: Network> ToString for Env<N> {
-    fn to_string(&self) -> String {
+impl<N: Network> fmt::Display for Env<N> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         // Get the network name.
         let network = match N::ID {
             MainnetV0::ID => NetworkName::MainnetV0,
             TestnetV0::ID => NetworkName::TestnetV0,
             _ => unimplemented!("Unsupported network"),
         };
-        // Return the formatted string.
-        format!("NETWORK={network}\nPRIVATE_KEY={}\nENDPOINT={}\n", self.private_key, self.endpoint)
+        // Write the formatted string.
+        write!(f, "NETWORK={network}\nPRIVATE_KEY={}\nENDPOINT={}\n", self.private_key, self.endpoint)
     }
 }
diff --git a/tests/test-framework/src/fetch.rs b/tests/test-framework/src/fetch.rs
index 0df7c27076..71316ace54 100644
--- a/tests/test-framework/src/fetch.rs
+++ b/tests/test-framework/src/fetch.rs
@@ -28,10 +28,7 @@ pub fn find_tests(path: &Path) -> impl Iterator<Item = (PathBuf, String)> {
         // Check if the file is a .leo file.
         let is_leo_file = path.extension().filter(|s| *s == "leo").is_some();
         // Read the test filter from the environment.
-        let filter = match std::env::var("TEST_FILTER") {
-            Ok(filter) => filter,
-            Err(_) => String::new(),
-        };
+        let filter = std::env::var("TEST_FILTER").unwrap_or_default();
         // Check if the path contains the filter.
         let satisfies_filter = filter.is_empty() || path.to_string_lossy().contains(&filter);
         // If the file is a .leo file and satisfies the filter, return the path and the file contents.