diff --git a/nomos-core/src/fountain/mock.rs b/nomos-core/src/fountain/mock.rs
index 109013f7..a6ec9b46 100644
--- a/nomos-core/src/fountain/mock.rs
+++ b/nomos-core/src/fountain/mock.rs
@@ -8,6 +8,7 @@ use crate::fountain::{FountainCode, FountainError};
 
 /// Fountain code that does no protocol at all.
 /// Just bypasses the raw bytes into a single chunk and reconstruct from it.
+#[derive(Debug)]
 pub struct MockFountain;
 
 #[async_trait]
diff --git a/nomos-services/consensus/src/lib.rs b/nomos-services/consensus/src/lib.rs
index 12d22f2b..68dfaf85 100644
--- a/nomos-services/consensus/src/lib.rs
+++ b/nomos-services/consensus/src/lib.rs
@@ -56,6 +56,16 @@ impl<Fountain: FountainCode> Clone for CarnotSettings<Fountain> {
     }
 }
 
+impl<Fountain: FountainCode> CarnotSettings<Fountain> {
+    #[inline]
+    pub const fn new(private_key: [u8; 32], fountain_settings: Fountain::Settings) -> Self {
+        Self {
+            private_key,
+            fountain_settings,
+        }
+    }
+}
+
 pub struct CarnotConsensus<A, P, M, F>
 where
     F: FountainCode,
diff --git a/nomos-services/mempool/tests/mock.rs b/nomos-services/mempool/tests/mock.rs
index 2939e0ae..95a8f6c8 100644
--- a/nomos-services/mempool/tests/mock.rs
+++ b/nomos-services/mempool/tests/mock.rs
@@ -95,7 +95,7 @@ fn test_mockmempool() {
             let (mtx, mrx) = tokio::sync::oneshot::channel();
             mempool_outbound
                 .send(MempoolMsg::View {
-                    ancestor_hint: BlockId,
+                    ancestor_hint: BlockId::default(),
                     reply_channel: mtx,
                 })
                 .await