diff --git a/opendut-carl/src/persistence/mod.rs b/opendut-carl/src/persistence/mod.rs
index e63de322..7f20c918 100644
--- a/opendut-carl/src/persistence/mod.rs
+++ b/opendut-carl/src/persistence/mod.rs
@@ -15,7 +15,7 @@ pub struct Db<'a> {
     pub inner: Mutex<&'a mut PgConnection>, //Mutex rather than RwLock, because we share this between threads (i.e. we need it to implement `Sync`)
 }
 impl<'a> Db<'a> {
-    pub fn from_connection(connection: &'a mut PgConnection) -> Db {
+    pub fn from_connection(connection: &'a mut PgConnection) -> Db<'a> {
         Self { inner: Mutex::new(connection) }
     }
     pub fn connection(&self) -> MutexGuard<&'a mut PgConnection> {
diff --git a/opendut-carl/src/resources/transaction.rs b/opendut-carl/src/resources/transaction.rs
index e624607a..bb841901 100644
--- a/opendut-carl/src/resources/transaction.rs
+++ b/opendut-carl/src/resources/transaction.rs
@@ -27,7 +27,7 @@ impl<'transaction> ResourcesTransaction<'transaction> {
         }
     }
 }
-impl<'transaction> ResourcesStorageApi for ResourcesTransaction<'transaction> {
+impl ResourcesStorageApi for ResourcesTransaction<'_> {
     fn insert<R>(&mut self, id: R::Id, resource: R) -> PersistenceResult<()>
     where R: Resource + Persistable + Subscribable {
         match self {
diff --git a/opendut-edgar/src/service/test_execution/container_manager.rs b/opendut-edgar/src/service/test_execution/container_manager.rs
index e772f312..644a3dbc 100644
--- a/opendut-edgar/src/service/test_execution/container_manager.rs
+++ b/opendut-edgar/src/service/test_execution/container_manager.rs
@@ -111,7 +111,7 @@ impl ContainerManager {
         Ok(())
     }
 
-    async fn get_container_state(&self, container_name: &String) -> Result<ContainerState, Error> {
+    async fn get_container_state(&self, container_name: &str) -> Result<ContainerState, Error> {
         let output = Command::new(self.config.engine.command_name())
             .args(["inspect", "-f", "'{{.State.Status}}'", container_name])
             .output()
@@ -194,7 +194,7 @@ impl ContainerManager {
         Ok(output.status.success())
     }
 
-    async fn stop_container(&self, container_name: &String) -> Result<(), Error>{
+    async fn stop_container(&self, container_name: &str) -> Result<(), Error>{
         let output = Command::new(self.config.engine.command_name())
             .args(["stop", container_name])
             .output()
diff --git a/opendut-edgar/src/setup/util.rs b/opendut-edgar/src/setup/util.rs
index 3b3f270a..66f65742 100644
--- a/opendut-edgar/src/setup/util.rs
+++ b/opendut-edgar/src/setup/util.rs
@@ -98,7 +98,7 @@ pub mod checksum {
 }
 
 pub fn running_in_docker() -> bool {
-    return Path::new("/.dockerenv").exists();
+    Path::new("/.dockerenv").exists()
 }
 
 
diff --git a/opendut-util/opendut-auth/src/confidential/blocking/client.rs b/opendut-util/opendut-auth/src/confidential/blocking/client.rs
index ac7d4b91..de2b5bdd 100644
--- a/opendut-util/opendut-auth/src/confidential/blocking/client.rs
+++ b/opendut-util/opendut-auth/src/confidential/blocking/client.rs
@@ -213,7 +213,7 @@ impl Interceptor for ConfClientArcMutex<Option<ConfidentialClientRef>> {
             }
         };
         
-        return match token {
+        match token {
             None => { Ok(request) }
             Some(token_result) => {
                 match token_result {
@@ -226,7 +226,7 @@ impl Interceptor for ConfClientArcMutex<Option<ConfidentialClientRef>> {
                     Err(error) => { Err(Status::unauthenticated(format!("{}", error))) }
                 }
             }
-        };
+        }
     }
 }
 
diff --git a/opendut-util/opendut-auth/src/confidential/tonic_service.rs b/opendut-util/opendut-auth/src/confidential/tonic_service.rs
index eb6fd413..4ae6849a 100644
--- a/opendut-util/opendut-auth/src/confidential/tonic_service.rs
+++ b/opendut-util/opendut-auth/src/confidential/tonic_service.rs
@@ -49,7 +49,7 @@ impl Service<Request<BoxBody>> for TonicAuthenticationService {
             let token_result = confidential_client.as_ref()
                 .map(|manager| manager.get_token());
 
-            return match token_result {
+            match token_result {
                 None => {
                     // Authentication disabled
                     Ok(inner.call(request).await?)
@@ -75,7 +75,7 @@ impl Service<Request<BoxBody>> for TonicAuthenticationService {
                         }
                     }
                 }
-            };
+            }
         })
     }
 }