diff --git a/ledger/allegra/block_test.go b/ledger/allegra/block_test.go
index 686264df..19ea900c 100644
--- a/ledger/allegra/block_test.go
+++ b/ledger/allegra/block_test.go
@@ -49,6 +49,8 @@ func TestAllegraBlock_CborRoundTrip_UsingCborEncode(t *testing.T) {
 	if err != nil {
 		t.Fatalf("Failed to unmarshal CBOR data into AllegraBlock: %v", err)
 	}
+	// Reset stored CBOR to nil
+	block.SetCbor(nil)
 
 	// Re-encode using the cbor Encode function
 	encoded, err := cbor.Encode(block)
diff --git a/ledger/shelley/block_test.go b/ledger/shelley/block_test.go
index f122fa70..5fa645a7 100644
--- a/ledger/shelley/block_test.go
+++ b/ledger/shelley/block_test.go
@@ -48,6 +48,8 @@ func TestShelleyBlock_CborRoundTrip_UsingCborEncode(t *testing.T) {
 	if err != nil {
 		t.Fatalf("Failed to unmarshal CBOR data into ShelleyBlock: %v", err)
 	}
+	// Reset stored CBOR to nil
+	block.SetCbor(nil)
 
 	// Re-encode using the cbor Encode function
 	encoded, err := cbor.Encode(block)