diff --git a/chain-ops/src/node/mod.rs b/chain-ops/src/node/mod.rs
index 3b0f9aa..5373603 100644
--- a/chain-ops/src/node/mod.rs
+++ b/chain-ops/src/node/mod.rs
@@ -40,6 +40,7 @@ pub trait Reconnect {
 }
 
 #[derive(Clone)]
+#[must_use]
 pub struct Client
 where
     Self: Reconnect,
diff --git a/chain-ops/src/signer.rs b/chain-ops/src/signer.rs
index 18a285f..d082fe4 100644
--- a/chain-ops/src/signer.rs
+++ b/chain-ops/src/signer.rs
@@ -175,6 +175,7 @@ impl Signer {
     }
 }
 
+#[must_use]
 pub struct GasAndFeeConfiguration {
     pub gas_adjustment_numerator: u32,
     pub gas_adjustment_denominator: NonZeroU32,
diff --git a/chain-ops/src/supervisor/configuration.rs b/chain-ops/src/supervisor/configuration.rs
index 23cc105..d15b5ca 100644
--- a/chain-ops/src/supervisor/configuration.rs
+++ b/chain-ops/src/supervisor/configuration.rs
@@ -103,22 +103,27 @@ impl Service {
         &self.admin_contract
     }
 
+    #[must_use]
     pub fn idle_duration(&self) -> Duration {
         self.idle_duration
     }
 
+    #[must_use]
     pub fn timeout_duration(&self) -> Duration {
         self.timeout_duration
     }
 
+    #[must_use]
     pub fn balance_reporter_idle_duration(&self) -> Duration {
         self.balance_reporter_idle_duration
     }
 
+    #[must_use]
     pub fn broadcast_delay_duration(&self) -> Duration {
         self.broadcast_delay_duration
     }
 
+    #[must_use]
     pub fn broadcast_retry_delay_duration(&self) -> Duration {
         self.broadcast_retry_delay_duration
     }