diff --git a/providers/cloudwatch/src/types/api/paginate.rs b/providers/cloudwatch/src/types/api/paginate.rs
index 53ad0f2..9f6e301 100644
--- a/providers/cloudwatch/src/types/api/paginate.rs
+++ b/providers/cloudwatch/src/types/api/paginate.rs
@@ -8,7 +8,7 @@ use std::collections::{BTreeMap, HashMap};
 pub trait Paginate: Into<CanonicalRequest<{ request_state::STEM }>> {
     /// Forge a subsequent request for the next page.
     /// Return None if the pagination_token is absent or empty.
-    #[must_use("nothing will happen unless this request is sent by a client.")]
+    #[must_use = "nothing will happen unless this request is sent by a client."]
     fn next_page(self, pagination_token: Option<String>) -> Option<Self>;
 }
 
diff --git a/providers/https/src/lib.rs b/providers/https/src/lib.rs
index bfb9c0c..16534c9 100644
--- a/providers/https/src/lib.rs
+++ b/providers/https/src/lib.rs
@@ -138,7 +138,7 @@ async fn send_query(
     log(format!("Sending {method:?} request to {url}"));
 
     let mut request = HttpRequest::default();
-    request.url = url.clone();
+    request.url.clone_from(&url);
     request.method = method;
     request.headers = Some(headers);
     request.body = body.map(|blob| blob.data);
diff --git a/providers/prometheus/src/timeseries.rs b/providers/prometheus/src/timeseries.rs
index 8061ecf..4c5a95e 100644
--- a/providers/prometheus/src/timeseries.rs
+++ b/providers/prometheus/src/timeseries.rs
@@ -3,6 +3,7 @@ use fiberplane_pdk::prelude::*;
 use grafana_common::{query_direct_and_proxied, Config};
 use serde::Deserialize;
 use serde_json::Result as SerdeResult;
+use std::fmt::Display;
 use std::time::SystemTime;
 use time::ext::NumericalDuration;
 
@@ -26,9 +27,9 @@ struct StepSize {
     unit: StepUnit,
 }
 
-impl ToString for StepSize {
-    fn to_string(&self) -> String {
-        format!("{}{}", self.amount, self.unit.to_str())
+impl Display for StepSize {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(f, "{}{}", self.amount, self.unit.to_str())
     }
 }