diff --git a/candle-metal-kernels/src/lib.rs b/candle-metal-kernels/src/lib.rs
index a270bb2888..be6160093e 100644
--- a/candle-metal-kernels/src/lib.rs
+++ b/candle-metal-kernels/src/lib.rs
@@ -2372,16 +2372,11 @@ pub fn call_const_fill(
     let pipeline = kernels.load_pipeline(device, Source::Fill, name)?;
     let encoder = ep.encoder();
     let encoder: &ComputeCommandEncoderRef = encoder.as_ref();
-
     encoder.set_compute_pipeline_state(&pipeline);
-
     set_params!(encoder, (output, v, length));
-
     let (thread_group_count, thread_group_size) = linear_split(&pipeline, length);
-
     encoder.use_resource(output, metal::MTLResourceUsage::Write);
     encoder.dispatch_thread_groups(thread_group_count, thread_group_size);
-
     Ok(())
 }
 
diff --git a/candle-metal-kernels/src/tests.rs b/candle-metal-kernels/src/tests.rs
index f37ab5bb9c..637bf2e243 100644
--- a/candle-metal-kernels/src/tests.rs
+++ b/candle-metal-kernels/src/tests.rs
@@ -2309,66 +2309,32 @@ fn conv_transpose1d_u32() {
     assert_eq!(results, expected);
 }
 
-fn constant_fill<T: Clone>(name: &'static str, len: usize, value: f32) -> Vec<T> {
-    let dev = device();
-    let kernels = Kernels::new();
-    let command_queue = dev.new_command_queue();
-    let command_buffer = command_queue.new_command_buffer();
-
-    let buffer = dev.new_buffer(
-        (len * std::mem::size_of::<T>()) as u64,
-        MTLResourceOptions::StorageModePrivate,
-    );
-
-    call_const_fill(&dev, command_buffer, &kernels, name, len, &buffer, value).unwrap();
-
-    command_buffer.commit();
-    command_buffer.wait_until_completed();
-
-    read_to_vec::<T>(&buffer, len)
-}
-
 #[test]
 fn const_fill() {
-    let fills = [
-        "fill_u8",
-        "fill_u32",
-        "fill_i64",
-        "fill_f16",
-        "fill_bf16",
-        "fill_f32",
-    ];
-
-    for name in fills {
+    fn constant_fill<T: Clone>(name: &'static str, len: usize, value: f32) -> Vec<T> {
+        let dev = device();
+        let kernels = Kernels::new();
+        let command_queue = dev.new_command_queue();
+        let command_buffer = command_queue.new_command_buffer();
+        let buffer = dev.new_buffer(
+            (len * std::mem::size_of::<T>()) as u64,
+            MTLResourceOptions::StorageModePrivate,
+        );
+        call_const_fill(&dev, command_buffer, &kernels, name, len, &buffer, value).unwrap();
+        command_buffer.commit();
+        command_buffer.wait_until_completed();
+        read_to_vec::<T>(&buffer, len)
+    }
+    fn test<T: Clone + PartialEq + std::fmt::Debug, F: FnOnce(f32) -> T>(name: &'static str, f: F) {
         let len = rand::thread_rng().gen_range(2..16) * rand::thread_rng().gen_range(4..16);
         let value = rand::thread_rng().gen_range(1. ..19.);
-
-        match name {
-            "fill_u8" => {
-                let v = constant_fill::<u8>(name, len, value);
-                assert_eq!(v, vec![value as u8; len])
-            }
-            "fill_u32" => {
-                let v = constant_fill::<u32>(name, len, value);
-                assert_eq!(v, vec![value as u32; len])
-            }
-            "fill_i64" => {
-                let v = constant_fill::<i64>(name, len, value);
-                assert_eq!(v, vec![value as i64; len])
-            }
-            "fill_f16" => {
-                let v = constant_fill::<f16>(name, len, value);
-                assert_eq!(v, vec![f16::from_f32(value); len])
-            }
-            "fill_bf16" => {
-                let v = constant_fill::<bf16>(name, len, value);
-                assert_eq!(v, vec![bf16::from_f32(value); len])
-            }
-            "fill_f32" => {
-                let v = constant_fill::<f32>(name, len, value);
-                assert_eq!(v, vec![value; len])
-            }
-            _ => unimplemented!(),
-        };
+        let v = constant_fill::<T>(name, len, value);
+        assert_eq!(v, vec![f(value); len])
     }
+    test::<u8, _>("fill_u8", |v| v as u8);
+    test::<u32, _>("fill_u32", |v| v as u32);
+    test::<i64, _>("fill_i64", |v| v as i64);
+    test::<f16, _>("fill_f16", f16::from_f32);
+    test::<bf16, _>("fill_bf16", bf16::from_f32);
+    test::<f32, _>("fill_f32", |v| v);
 }