diff --git a/cli/tests/cmd.rs b/cli/tests/cmd.rs
index f2a1a397e150..ec8c1cfe70ba 100644
--- a/cli/tests/cmd.rs
+++ b/cli/tests/cmd.rs
@@ -259,7 +259,7 @@ forgetest_init!(can_emit_extra_output, |prj: TestProject, mut cmd: TestCommand|
     cmd.assert_non_empty_stdout();
 
     let metadata_path = prj.paths().artifacts.join("Contract.sol/Contract.metadata.json");
-    let artifact: Metadata = ethers::solc::utils::read_json_file(metadata_path).unwrap();
+    let _artifact: Metadata = ethers::solc::utils::read_json_file(metadata_path).unwrap();
 });
 
 // test against a local checkout, useful to debug with local ethers-rs patch
diff --git a/utils/src/lib.rs b/utils/src/lib.rs
index 662f4d5971f7..c7195d99fe19 100644
--- a/utils/src/lib.rs
+++ b/utils/src/lib.rs
@@ -920,11 +920,8 @@ mod tests {
     use super::*;
     use ethers::{
         abi::Abi,
+        solc::{artifacts::CompactContractBytecode, Project, ProjectPathsConfig},
         types::{Address, Bytes},
-        solc::{
-            ProjectPathsConfig, Project, Artifact,
-            artifacts::CompactContractBytecode,
-        }
     };
     use std::path::PathBuf;
 
@@ -932,17 +929,18 @@ mod tests {
     fn test_linking() {
         let lib_test_json_lib_test = "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";
         let lib_test_nested_json_lib_test_nested = "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";
-        let contract_names = ["DsTestMini.json:DsTestMini", "LibLinkingTest.json:LibLinkingTest", "LibTest.json:LibTest", "LibTestNested.json:LibTestNested", "Main.json:Main"];
+        let contract_names = [
+            "DsTestMini.json:DsTestMini",
+            "LibLinkingTest.json:LibLinkingTest",
+            "LibTest.json:LibTest",
+            "LibTestNested.json:LibTestNested",
+            "Main.json:Main",
+        ];
 
         let root = PathBuf::from(env!("CARGO_MANIFEST_DIR")).join("testdata/linking");
         let paths = ProjectPathsConfig::builder().root(&root).sources(&root).build().unwrap();
 
-        let project = Project::builder()
-            .paths(paths)
-            .ephemeral()
-            .no_artifacts()
-            .build()
-            .unwrap();
+        let project = Project::builder().paths(paths).ephemeral().no_artifacts().build().unwrap();
 
         let output = project.compile().unwrap();
         let contracts = output
@@ -951,7 +949,8 @@ mod tests {
             .collect::<BTreeMap<String, CompactContractBytecode>>();
 
         let mut known_contracts: BTreeMap<String, (Abi, Vec<u8>)> = Default::default();
-        let mut deployable_contracts: BTreeMap<String, (Abi, Bytes, Vec<Bytes>)> = Default::default();
+        let mut deployable_contracts: BTreeMap<String, (Abi, Bytes, Vec<Bytes>)> =
+            Default::default();
 
         assert_eq!(&contracts.keys().collect::<Vec<&String>>()[..], &contract_names[..]);
 
@@ -968,28 +967,50 @@ mod tests {
                     }
                     "LibLinkingTest.json:LibLinkingTest" => {
                         assert_eq!(post_link_input.dependencies.len(), 3);
-                        assert_eq!(hex::encode(post_link_input.dependencies[0].clone()), lib_test_json_lib_test);
-                        assert_eq!(hex::encode(post_link_input.dependencies[1].clone()), lib_test_json_lib_test);
-                        assert_eq!(hex::encode(post_link_input.dependencies[2].clone()), lib_test_nested_json_lib_test_nested);
+                        assert_eq!(
+                            hex::encode(post_link_input.dependencies[0].clone()),
+                            lib_test_json_lib_test
+                        );
+                        assert_eq!(
+                            hex::encode(post_link_input.dependencies[1].clone()),
+                            lib_test_json_lib_test
+                        );
+                        assert_eq!(
+                            hex::encode(post_link_input.dependencies[2].clone()),
+                            lib_test_nested_json_lib_test_nested
+                        );
                     }
                     "LibTest.json:LibTest" => {
                         assert_eq!(post_link_input.dependencies.len(), 0);
                     }
                     "LibTestNested.json:LibTestNested" => {
                         assert_eq!(post_link_input.dependencies.len(), 1);
-                        assert_eq!(hex::encode(post_link_input.dependencies[0].clone()), lib_test_json_lib_test);
+                        assert_eq!(
+                            hex::encode(post_link_input.dependencies[0].clone()),
+                            lib_test_json_lib_test
+                        );
                     }
                     "Main.json:Main" => {
                         assert_eq!(post_link_input.dependencies.len(), 3);
-                        assert_eq!(hex::encode(post_link_input.dependencies[0].clone()), lib_test_json_lib_test);
-                        assert_eq!(hex::encode(post_link_input.dependencies[1].clone()), lib_test_json_lib_test);
-                        assert_eq!(hex::encode(post_link_input.dependencies[2].clone()), lib_test_nested_json_lib_test_nested);
+                        assert_eq!(
+                            hex::encode(post_link_input.dependencies[0].clone()),
+                            lib_test_json_lib_test
+                        );
+                        assert_eq!(
+                            hex::encode(post_link_input.dependencies[1].clone()),
+                            lib_test_json_lib_test
+                        );
+                        assert_eq!(
+                            hex::encode(post_link_input.dependencies[2].clone()),
+                            lib_test_nested_json_lib_test_nested
+                        );
                     }
-                    _ => assert!(false)
+                    _ => assert!(false),
                 }
                 Ok(())
-            }
-        ).unwrap();
+            },
+        )
+        .unwrap();
     }
 
     #[test]