diff --git a/server/tests/common/auth.rs b/server/tests/common/auth.rs
index 4e966f4..0bcaf3e 100644
--- a/server/tests/common/auth.rs
+++ b/server/tests/common/auth.rs
@@ -10,8 +10,8 @@ pub fn get_token(client: &Client) -> String {
         .header(reqwest::header::CONTENT_TYPE, "application/json")
         .body(
             serde_json::to_string(&lldap_auth::login::ClientSimpleLoginRequest {
-                username: username,
-                password: password,
+                username,
+                password,
             })
             .expect("Failed to encode the username/password as json to log in"),
         )
diff --git a/server/tests/common/env.rs b/server/tests/common/env.rs
index 7d17ced..f377887 100644
--- a/server/tests/common/env.rs
+++ b/server/tests/common/env.rs
@@ -5,7 +5,7 @@ pub const DB_KEY: &str = "LLDAP_DATABASE_URL";
 pub fn database_url() -> String {
     let url = var(DB_KEY).ok();
     let url = url.unwrap_or("sqlite://e2e_test.db?mode=rwc".to_string());
-    url.to_string()
+    url
 }
 
 pub fn ldap_url() -> String {
@@ -27,17 +27,17 @@ pub fn http_url() -> String {
 pub fn admin_dn() -> String {
     let user = var("LLDAP_LDAP_USER_DN").ok();
     let user = user.unwrap_or("admin".to_string());
-    user.to_string()
+    user
 }
 
 pub fn admin_password() -> String {
     let pass = var("LLDAP_LDAP_USER_PASS").ok();
     let pass = pass.unwrap_or("password".to_string());
-    pass.to_string()
+    pass
 }
 
 pub fn base_dn() -> String {
     let dn = var("LLDAP_LDAP_BASE_DN").ok();
     let dn = dn.unwrap_or("dc=example,dc=com".to_string());
-    dn.to_string()
+    dn
 }
diff --git a/server/tests/common/fixture.rs b/server/tests/common/fixture.rs
index 7529a30..eb95b2a 100644
--- a/server/tests/common/fixture.rs
+++ b/server/tests/common/fixture.rs
@@ -110,18 +110,18 @@ impl LLDAPFixture {
         self.users.insert(user.clone());
     }
 
-    fn add_group(&mut self, group: &String) {
+    fn add_group(&mut self, group: &str) {
         let id = post::<CreateGroup>(
             &self.client,
             &self.token,
             create_group::Variables {
-                name: group.clone(),
+                name: group.to_owned(),
             },
         )
         .expect("failed to add group")
         .create_group
         .id;
-        self.groups.insert(group.clone(), id);
+        self.groups.insert(group.to_owned(), id);
     }
 
     fn delete_user(&mut self, user: &String) {
@@ -147,13 +147,13 @@ impl LLDAPFixture {
         self.groups.remove(group);
     }
 
-    fn add_user_to_group(&mut self, user: &String, group: &String) {
+    fn add_user_to_group(&mut self, user: &str, group: &String) {
         let group_id = self.groups.get(group).unwrap();
         post::<AddUserToGroup>(
             &self.client,
             &self.token,
             add_user_to_group::Variables {
-                user: user.clone(),
+                user: user.to_owned(),
                 group: *group_id,
             },
         )