diff --git a/pkg/file/pipeline/hashtrie/hashtrie.go b/pkg/file/pipeline/hashtrie/hashtrie.go
index e63577da0e4..530d04c820d 100644
--- a/pkg/file/pipeline/hashtrie/hashtrie.go
+++ b/pkg/file/pipeline/hashtrie/hashtrie.go
@@ -222,7 +222,7 @@ func (h *hashTrieWriter) Sum() ([]byte, error) {
 			if err != nil {
 				return nil, err
 			}
-			// update counters, substracting from current level is not necessary
+			// update counters, subtracting from current level is not necessary
 			h.effectiveChunkCounters[i+1]++
 			h.chunkCounters[i+1]++
 		default:
diff --git a/pkg/file/redundancy/redundancy.go b/pkg/file/redundancy/redundancy.go
index 26ed7a74e3a..0a34129690a 100644
--- a/pkg/file/redundancy/redundancy.go
+++ b/pkg/file/redundancy/redundancy.go
@@ -154,7 +154,10 @@ func (p *Params) encode(chunkLevel int, callback ParityChunkCallback) error {
 	for i := shards; i < n; i++ {
 		p.buffer[chunkLevel][i] = make([]byte, pz)
 	}
-	enc.Encode(p.buffer[chunkLevel][:n])
+	err = enc.Encode(p.buffer[chunkLevel][:n])
+	if err != nil {
+		return err
+	}
 	// store and pass newly created parity chunks
 	for i := shards; i < n; i++ {
 		chunkData := p.buffer[chunkLevel][i]
diff --git a/pkg/file/redundancy/redundancy_test.go b/pkg/file/redundancy/redundancy_test.go
index 31c99035411..a968cb43386 100644
--- a/pkg/file/redundancy/redundancy_test.go
+++ b/pkg/file/redundancy/redundancy_test.go
@@ -115,12 +115,21 @@ func TestEncode(t *testing.T) {
 
 					for i := 0; i < shardCount; i++ {
 						buffer := make([]byte, 32)
-						io.ReadFull(rand.Reader, buffer)
-						params.ChunkWrite(0, buffer, parityCallback)
+						_, err := io.ReadFull(rand.Reader, buffer)
+						if err != nil {
+							t.Error(err)
+						}
+						err = params.ChunkWrite(0, buffer, parityCallback)
+						if err != nil {
+							t.Error(err)
+						}
 					}
 					if shardCount != maxShards {
 						// encode should be called automatically when reaching maxshards
-						params.Encode(0, parityCallback)
+						err := params.Encode(0, parityCallback)
+						if err != nil {
+							t.Error(err)
+						}
 					}
 
 					// CHECKS