diff --git a/examples/timestamp-queries/src/main.rs b/examples/timestamp-queries/src/main.rs
index 0bdd15e47d..f8c524f03c 100644
--- a/examples/timestamp-queries/src/main.rs
+++ b/examples/timestamp-queries/src/main.rs
@@ -47,6 +47,7 @@ impl QueryResults {
     // * compute end
     const NUM_QUERIES: u64 = 8;
 
+    #[allow(clippy::redundant_closure)] // False positive
     fn from_raw_results(timestamps: Vec<u64>, timestamps_inside_passes: bool) -> Self {
         assert_eq!(timestamps.len(), Self::NUM_QUERIES as usize);
 
@@ -60,9 +61,9 @@ impl QueryResults {
         let mut encoder_timestamps = [0, 0];
         encoder_timestamps[0] = get_next_slot();
         let render_start_end_timestamps = [get_next_slot(), get_next_slot()];
-        let render_inside_timestamp = timestamps_inside_passes.then(get_next_slot);
+        let render_inside_timestamp = timestamps_inside_passes.then(|| get_next_slot());
         let compute_start_end_timestamps = [get_next_slot(), get_next_slot()];
-        let compute_inside_timestamp = timestamps_inside_passes.then(get_next_slot);
+        let compute_inside_timestamp = timestamps_inside_passes.then(|| get_next_slot());
         encoder_timestamps[1] = get_next_slot();
 
         QueryResults {
diff --git a/wgpu-hal/src/metal/command.rs b/wgpu-hal/src/metal/command.rs
index d5ab238c6e..a3d12f50af 100644
--- a/wgpu-hal/src/metal/command.rs
+++ b/wgpu-hal/src/metal/command.rs
@@ -417,19 +417,19 @@ impl crate::CommandEncoder<super::Api> for super::CommandEncoder {
 
         // Try to use an existing encoder for timestamp query if possible.
         // This works only if it's supported for the active encoder.
-        if let (true, Some(ref encoder)) = (
+        if let (true, Some(encoder)) = (
             support.contains(TimestampQuerySupport::ON_BLIT_ENCODER),
-            &self.state.blit,
+            self.state.blit.as_ref(),
         ) {
             encoder.sample_counters_in_buffer(sample_buffer, index as _, with_barrier);
-        } else if let (true, Some(ref encoder)) = (
+        } else if let (true, Some(encoder)) = (
             support.contains(TimestampQuerySupport::ON_RENDER_ENCODER),
-            &self.state.render,
+            self.state.render.as_ref(),
         ) {
             encoder.sample_counters_in_buffer(sample_buffer, index as _, with_barrier);
-        } else if let (true, Some(ref encoder)) = (
+        } else if let (true, Some(encoder)) = (
             support.contains(TimestampQuerySupport::ON_COMPUTE_ENCODER),
-            &self.state.compute,
+            self.state.compute.as_ref(),
         ) {
             encoder.sample_counters_in_buffer(sample_buffer, index as _, with_barrier);
         } else {