diff --git a/src/groupbylazy.rs b/src/groupbylazy.rs
index af7512343..f2f717fb9 100644
--- a/src/groupbylazy.rs
+++ b/src/groupbylazy.rs
@@ -197,14 +197,11 @@ where
 
         while let Some(elt) = self.next_element() {
             let key = self.key.call_mut(&elt);
-            match self.current_key.take() {
-                None => {}
-                Some(old_key) => {
-                    if old_key != key {
-                        self.current_key = Some(key);
-                        first_elt = Some(elt);
-                        break;
-                    }
+            if let Some(old_key) = self.current_key.take() {
+                if old_key != key {
+                    self.current_key = Some(key);
+                    first_elt = Some(elt);
+                    break;
                 }
             }
             self.current_key = Some(key);
@@ -248,15 +245,12 @@ where
             None => None,
             Some(elt) => {
                 let key = self.key.call_mut(&elt);
-                match self.current_key.take() {
-                    None => {}
-                    Some(old_key) => {
-                        if old_key != key {
-                            self.current_key = Some(key);
-                            self.current_elt = Some(elt);
-                            self.top_group += 1;
-                            return None;
-                        }
+                if let Some(old_key) = self.current_key.take() {
+                    if old_key != key {
+                        self.current_key = Some(key);
+                        self.current_elt = Some(elt);
+                        self.top_group += 1;
+                        return None;
                     }
                 }
                 self.current_key = Some(key);