diff --git a/chronik/chronik-db/src/io/blocks.rs b/chronik/chronik-db/src/io/blocks.rs
--- a/chronik/chronik-db/src/io/blocks.rs
+++ b/chronik/chronik-db/src/io/blocks.rs
@@ -57,7 +57,7 @@
 }
 
 /// Errors for [`BlockWriter`] and [`BlockReader`].
-#[derive(Debug, Error, PartialEq)]
+#[derive(Debug, Eq, Error, PartialEq)]
 pub enum BlocksError {
     /// Block height must be 4 bytes.
     #[error("Inconsistent DB: Invalid height bytes: {0:?}")]
diff --git a/chronik/chronik-db/src/ser.rs b/chronik/chronik-db/src/ser.rs
--- a/chronik/chronik-db/src/ser.rs
+++ b/chronik/chronik-db/src/ser.rs
@@ -8,7 +8,7 @@
 use thiserror::Error;
 
 /// Errors for de-/serialization.
-#[derive(Clone, Debug, Error, PartialEq)]
+#[derive(Clone, Debug, Eq, Error, PartialEq)]
 pub enum SerError {
     /// Serialization failed.
     #[error("Cannot serialize {type_name}: {error}")]