diff --git a/cli/artifacts/metadata.scale b/cli/artifacts/metadata.scale
index 68a84527c..3eb331b8a 100644
Binary files a/cli/artifacts/metadata.scale and b/cli/artifacts/metadata.scale differ
diff --git a/cli/polka-storage/storagext/src/runtime/mod.rs b/cli/polka-storage/storagext/src/runtime/mod.rs
index e73651eb1..d759fc651 100644
--- a/cli/polka-storage/storagext/src/runtime/mod.rs
+++ b/cli/polka-storage/storagext/src/runtime/mod.rs
@@ -77,7 +77,7 @@ pub mod display;
         derive = "::serde::Serialize"
     ),
     derive_for_type(
-        path = "pallet_market::pallet::DealSettlementError",
+        path = "pallet_market::error::DealSettlementError",
         derive = "::serde::Serialize"
     ),
     derive_for_type(
diff --git a/primitives/commitment/src/piece.rs b/primitives/commitment/src/piece.rs
index 7adeb8fb8..5503a4db8 100644
--- a/primitives/commitment/src/piece.rs
+++ b/primitives/commitment/src/piece.rs
@@ -198,7 +198,7 @@ impl Into<filecoin_proofs::PaddedBytesAmount> for PaddedPieceSize {
     }
 }
 
-#[derive(Debug)]
+#[derive(Debug, Eq, PartialEq)]
 pub enum PaddedPieceSizeError {
     SizeTooSmall,
     SizeNotPowerOfTwo,
@@ -220,7 +220,7 @@ mod tests {
     fn invalid_piece_checks() {
         assert_eq!(
             PaddedPieceSize::new(127),
-            Err("minimum piece size is 128 bytes")
+            Err(PaddedPieceSizeError::SizeTooSmall)
         );
         assert_eq!(
             UnpaddedPieceSize::new(126),
@@ -228,7 +228,7 @@ mod tests {
         );
         assert_eq!(
             PaddedPieceSize::new(0b10000001),
-            Err("padded piece size must be a power of 2")
+            Err(PaddedPieceSizeError::SizeNotPowerOfTwo)
         );
         assert_eq!(
             UnpaddedPieceSize::new(0b1110111000),