diff --git a/api-put-object-streaming.go b/api-put-object-streaming.go
index c2663b49b..3ff3b69ef 100644
--- a/api-put-object-streaming.go
+++ b/api-put-object-streaming.go
@@ -330,7 +330,6 @@ func (c *Client) putObjectMultipartStreamOptionalChecksum(ctx context.Context, b
 
 	// Create checksums
 	// CRC32C is ~50% faster on AMD64 @ 30GB/s
-	var crcBytes []byte
 	customHeader := make(http.Header)
 	crc := opts.AutoChecksum.Hasher()
 	md5Hash := c.md5Hasher()
@@ -377,7 +376,6 @@ func (c *Client) putObjectMultipartStreamOptionalChecksum(ctx context.Context, b
 			crc.Write(buf[:length])
 			cSum := crc.Sum(nil)
 			customHeader.Set(opts.AutoChecksum.KeyCapitalized(), base64.StdEncoding.EncodeToString(cSum))
-			crcBytes = append(crcBytes, cSum...)
 		}
 
 		// Update progress reader appropriately to the latest offset
diff --git a/utils_test.go b/utils_test.go
index 6e4a0ddbb..f6bccfc3b 100644
--- a/utils_test.go
+++ b/utils_test.go
@@ -446,7 +446,7 @@ func TestFullObjectChecksum64(t *testing.T) {
 			want := sum(b)
 			var parts []ObjectPart
 			for len(b) > 0 {
-				sz := len(b) / 2
+				sz := rng.Intn(len(b) / 2)
 				if len(b)-sz < 1024 {
 					sz = len(b)
 				}