diff --git a/common/client-libs/validator-client/src/client.rs b/common/client-libs/validator-client/src/client.rs
index 4a3653fb21..2caf379fe6 100644
--- a/common/client-libs/validator-client/src/client.rs
+++ b/common/client-libs/validator-client/src/client.rs
@@ -25,6 +25,7 @@ use validator_api_requests::models::{
 };
 
 #[cfg(feature = "nymd-client")]
+#[must_use]
 pub struct Config {
     api_url: Url,
     nymd_url: Url,
diff --git a/common/client-libs/validator-client/src/nymd/wallet/mod.rs b/common/client-libs/validator-client/src/nymd/wallet/mod.rs
index 195ebc9239..8abbccb7a0 100644
--- a/common/client-libs/validator-client/src/nymd/wallet/mod.rs
+++ b/common/client-libs/validator-client/src/nymd/wallet/mod.rs
@@ -133,6 +133,7 @@ impl DirectSecp256k1HdWallet {
     }
 }
 
+#[must_use]
 pub struct DirectSecp256k1HdWalletBuilder {
     /// The password to use when deriving a BIP39 seed from a mnemonic.
     bip39_password: String,
diff --git a/common/client-libs/validator-client/src/validator_api/mod.rs b/common/client-libs/validator-client/src/validator_api/mod.rs
index 528f3b9939..c30a76b174 100644
--- a/common/client-libs/validator-client/src/validator_api/mod.rs
+++ b/common/client-libs/validator-client/src/validator_api/mod.rs
@@ -112,7 +112,7 @@ impl Client {
                 routes::MIXNODES,
                 routes::REWARDED,
                 routes::INCLUSION_CHANCE,
-                &mixnode_id.to_string(),
+                mixnode_id,
             ],
             NO_PARAMS,
         )
diff --git a/common/mixnode-common/src/verloc/mod.rs b/common/mixnode-common/src/verloc/mod.rs
index 52060cb804..623bdc9e18 100644
--- a/common/mixnode-common/src/verloc/mod.rs
+++ b/common/mixnode-common/src/verloc/mod.rs
@@ -77,6 +77,7 @@ impl Config {
     }
 }
 
+#[must_use]
 pub struct ConfigBuilder(Config);
 
 impl ConfigBuilder {
diff --git a/common/nymsphinx/src/preparer/mod.rs b/common/nymsphinx/src/preparer/mod.rs
index 63d2f67559..3f56f9bada 100644
--- a/common/nymsphinx/src/preparer/mod.rs
+++ b/common/nymsphinx/src/preparer/mod.rs
@@ -54,6 +54,7 @@ impl From<NymTopologyError> for PreparationError {
 /// an optional reply-SURB, padding it to appropriate length, encrypting its content,
 /// and chunking into appropriate size [`Fragment`]s.
 #[cfg_attr(not(target_arch = "wasm32"), derive(Clone))]
+#[must_use]
 pub struct MessagePreparer<R: CryptoRng + Rng> {
     /// Instance of a cryptographically secure random number generator.
     rng: R,
diff --git a/common/nymsphinx/src/receiver.rs b/common/nymsphinx/src/receiver.rs
index d06afa9a91..1707983ca3 100644
--- a/common/nymsphinx/src/receiver.rs
+++ b/common/nymsphinx/src/receiver.rs
@@ -58,6 +58,7 @@ impl MessageReceiver {
     }
 
     /// Allows setting non-default number of expected mix hops in the network.
+    #[must_use]
     pub fn with_mix_hops(mut self, hops: u8) -> Self {
         self.num_mix_hops = hops;
         self
diff --git a/common/topology/src/filter.rs b/common/topology/src/filter.rs
index 652b5f92e9..6c1a3c2fe1 100644
--- a/common/topology/src/filter.rs
+++ b/common/topology/src/filter.rs
@@ -9,6 +9,7 @@ pub trait Versioned: Clone {
 }
 
 pub trait VersionFilterable<T> {
+    #[must_use]
     fn filter_by_version(&self, expected_version: &str) -> Self;
 }
 
diff --git a/common/topology/src/lib.rs b/common/topology/src/lib.rs
index c14256512a..7d5b9843d4 100644
--- a/common/topology/src/lib.rs
+++ b/common/topology/src/lib.rs
@@ -206,10 +206,12 @@ impl NymTopology {
         true
     }
 
+    #[must_use]
     pub fn filter_system_version(&self, expected_version: &str) -> Self {
         self.filter_node_versions(expected_version, expected_version)
     }
 
+    #[must_use]
     pub fn filter_node_versions(
         &self,
         expected_mix_version: &str,