diff --git a/zebra-chain/src/parameters/network/subsidy.rs b/zebra-chain/src/parameters/network/subsidy.rs
index 0d107d7c54c..8c6de5434b4 100644
--- a/zebra-chain/src/parameters/network/subsidy.rs
+++ b/zebra-chain/src/parameters/network/subsidy.rs
@@ -410,7 +410,8 @@ impl ParameterSubsidy for Network {
                 } else if params.is_default_testnet() {
                     FIRST_HALVING_TESTNET
                 } else {
-                    height_for_halving_index(1, self).unwrap()
+                    height_for_halving_index(1, self)
+                        .expect("first halving height should be available")
                 }
             }
         }
diff --git a/zebra-chain/src/parameters/network/tests/vectors.rs b/zebra-chain/src/parameters/network/tests/vectors.rs
index cf8ccebbe52..c839a26c116 100644
--- a/zebra-chain/src/parameters/network/tests/vectors.rs
+++ b/zebra-chain/src/parameters/network/tests/vectors.rs
@@ -450,4 +450,3 @@ fn check_configured_funding_stream_constraints() {
     expected_panic_wrong_addr_network
         .expect_err("should panic when recipient addresses are for Mainnet");
 }
-
diff --git a/zebra-consensus/src/block/subsidy/general.rs b/zebra-consensus/src/block/subsidy/general.rs
index 8eb84b127de..48a5fb0d36c 100644
--- a/zebra-consensus/src/block/subsidy/general.rs
+++ b/zebra-consensus/src/block/subsidy/general.rs
@@ -507,7 +507,11 @@ mod test {
     fn check_height_for_num_halvings() {
         for network in Network::iter() {
             for halving_index in 1..1000 {
-                let Some(height_for_halving) = zebra_chain::parameters::subsidy::height_for_halving_index(halving_index, &network)
+                let Some(height_for_halving) =
+                    zebra_chain::parameters::subsidy::height_for_halving_index(
+                        halving_index,
+                        &network,
+                    )
                 else {
                     panic!("could not find height for halving {halving_index}");
                 };