diff --git a/integration-tests/call-runtime/lib.rs b/integration-tests/call-runtime/lib.rs
index fd11591b7f7..b655f13adf4 100644
--- a/integration-tests/call-runtime/lib.rs
+++ b/integration-tests/call-runtime/lib.rs
@@ -46,10 +46,7 @@ mod runtime_call {
         RuntimeCall,
     };
 
-    use ink::env::{
-        Error as EnvError,
-        ReturnErrorCode,
-    };
+    use ink::env::Error as EnvError;
 
     /// A trivial contract with a single message, that uses `call-runtime` API for
     /// performing native token transfer.
@@ -66,9 +63,7 @@ mod runtime_call {
     impl From<EnvError> for RuntimeError {
         fn from(e: EnvError) -> Self {
             match e {
-                EnvError::CallRuntimeFailed => {
-                    RuntimeError::CallRuntimeFailed
-                }
+                EnvError::CallRuntimeFailed => RuntimeError::CallRuntimeFailed,
                 _ => panic!("Unexpected error from `pallet-contracts`."),
             }
         }
diff --git a/integration-tests/erc1155/lib.rs b/integration-tests/erc1155/lib.rs
index 0965e5dd911..27b9f2161eb 100644
--- a/integration-tests/erc1155/lib.rs
+++ b/integration-tests/erc1155/lib.rs
@@ -414,8 +414,8 @@ mod erc1155 {
                     }
                     Err(e) => {
                         match e {
-                            ink::env::Error::CodeNotFound | ink::env::Error::NotCallable,
-                            ) => {
+                            ink::env::Error::CodeNotFound
+                            | ink::env::Error::NotCallable => {
                                 // Our recipient wasn't a smart contract, so there's
                                 // nothing more for
                                 // us to do
diff --git a/integration-tests/sr25519-verification/lib.rs b/integration-tests/sr25519-verification/lib.rs
index eed64a1d196..a8322b0149b 100644
--- a/integration-tests/sr25519-verification/lib.rs
+++ b/integration-tests/sr25519-verification/lib.rs
@@ -73,10 +73,7 @@ pub mod sr25519_verification {
                 143,
             ];
             let result = ink::env::sr25519_verify(&signature, &message, &public_key);
-            assert_eq!(
-                result,
-                Err(ink::env::Error::Sr25519VerifyFailed)
-            );
+            assert_eq!(result, Err(ink::env::Error::Sr25519VerifyFailed));
         }
 
         #[ink::test]
@@ -102,10 +99,7 @@ pub mod sr25519_verification {
                 143,
             ];
             let result = ink::env::sr25519_verify(&signature, &message, &public_key);
-            assert_eq!(
-                result,
-                Err(ink::env::Error::Sr25519VerifyFailed)
-            );
+            assert_eq!(result, Err(ink::env::Error::Sr25519VerifyFailed));
         }
 
         #[ink::test]
@@ -131,10 +125,7 @@ pub mod sr25519_verification {
                 143,
             ];
             let result = ink::env::sr25519_verify(&signature, &message, &public_key);
-            assert_eq!(
-                result,
-                Err(ink::env::Error::Sr25519VerifyFailed)
-            );
+            assert_eq!(result, Err(ink::env::Error::Sr25519VerifyFailed));
         }
     }
 }