diff --git a/Cargo.toml b/Cargo.toml
index 9cd206cebf77e704e0e0535d32c93212469e7d06..a0499407726c3394d4974579d5e072e5b23078a5 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -879,6 +879,7 @@ manual_pattern_char_comparison = "warn"
 manual_rotate = "warn"
 manual_slice_fill = "warn"
 manual_while_let_some = "warn"
+map_clone = "warn"
 map_collect_result_unit = "warn"
 match_like_matches_macro = "warn"
 match_overlapping_arm = "warn"
diff --git a/crates/git_ui/src/git_panel.rs b/crates/git_ui/src/git_panel.rs
index 79d182eb22b2fb3c015f7ba419e0ba597d4f23e4..cc947bcb72ff004e9ef0b73c4d21f340c917a3b9 100644
--- a/crates/git_ui/src/git_panel.rs
+++ b/crates/git_ui/src/git_panel.rs
@@ -1335,7 +1335,7 @@ impl GitPanel {
                         section.contains(status_entry, repository)
                             && status_entry.staging.as_bool() != Some(goal_staged_state)
                     })
-                    .map(|status_entry| status_entry.clone())
+                    .cloned()
                     .collect::<Vec<_>>();
 
                 (goal_staged_state, entries)
diff --git a/crates/gpui/src/platform/linux/x11/client.rs b/crates/gpui/src/platform/linux/x11/client.rs
index d5011708927d89e7f7c66758710f6e8599e9ca8d..9a43bd64706ec21905b18b8837af2ddc785cba87 100644
--- a/crates/gpui/src/platform/linux/x11/client.rs
+++ b/crates/gpui/src/platform/linux/x11/client.rs
@@ -2108,7 +2108,7 @@ fn current_pointer_device_states(
                     .classes
                     .iter()
                     .filter_map(|class| class.data.as_scroll())
-                    .map(|class| *class)
+                    .copied()
                     .rev()
                     .collect::<Vec<_>>();
                 let old_state = scroll_values_to_preserve.get(&info.deviceid);
diff --git a/crates/workspace/src/pane.rs b/crates/workspace/src/pane.rs
index dea18ddbe20e77cf25042d51998def8efa4893e6..23c8c0b1853e155df5d4a9b1cf3b4895bb74fd9a 100644
--- a/crates/workspace/src/pane.rs
+++ b/crates/workspace/src/pane.rs
@@ -3082,7 +3082,7 @@ impl Pane {
                             .read(cx)
                             .items()
                             .find(|item| item.item_id() == item_id)
-                            .map(|item| item.clone())
+                            .cloned()
                         else {
                             return;
                         };