4 files changed, 12 insertions, 15 deletions

diff --git a/src/mime/multipart/example_test.go b/src/mime/multipart/example_test.go
index 6d6ba81d5e..fe154ac4f6 100644
--- a/src/mime/multipart/example_test.go
+++ b/src/mime/multipart/example_test.go
@@ -7,7 +7,6 @@ package multipart_test
 import (
 	"fmt"
 	"io"
-	"io/ioutil"
 	"log"
 	"mime"
 	"mime/multipart"
@@ -39,7 +38,7 @@ func ExampleNewReader() {
 			if err != nil {
 				log.Fatal(err)
 			}
-			slurp, err := ioutil.ReadAll(p)
+			slurp, err := io.ReadAll(p)
 			if err != nil {
 				log.Fatal(err)
 			}
diff --git a/src/mime/multipart/multipart.go b/src/mime/multipart/multipart.go
index 1750300fb5..cb8bf39338 100644
--- a/src/mime/multipart/multipart.go
+++ b/src/mime/multipart/multipart.go
@@ -17,7 +17,6 @@ import (
 	"bytes"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"mime"
 	"mime/quotedprintable"
 	"net/textproto"
@@ -278,7 +277,7 @@ func matchAfterPrefix(buf, prefix []byte, readErr error) int {
 }
 
 func (p *Part) Close() error {
-	io.Copy(ioutil.Discard, p)
+	io.Copy(io.Discard, p)
 	return nil
 }
 
diff --git a/src/mime/multipart/multipart_test.go b/src/mime/multipart/multipart_test.go
index b60c54a204..741d2304ed 100644
--- a/src/mime/multipart/multipart_test.go
+++ b/src/mime/multipart/multipart_test.go
@@ -9,7 +9,6 @@ import (
 	"encoding/json"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net/textproto"
 	"os"
 	"reflect"
@@ -307,7 +306,7 @@ Oh no, premature EOF!
 	if err != nil {
 		t.Fatalf("didn't get a part")
 	}
-	_, err = io.Copy(ioutil.Discard, part)
+	_, err = io.Copy(io.Discard, part)
 	if err != io.ErrUnexpectedEOF {
 		t.Fatalf("expected error io.ErrUnexpectedEOF; got %v", err)
 	}
@@ -372,7 +371,7 @@ Body 2
 		if !reflect.DeepEqual(part.Header, hdr) {
 			t.Errorf("Part %d: part.Header = %v, want %v", i, part.Header, hdr)
 		}
-		data, err := ioutil.ReadAll(part)
+		data, err := io.ReadAll(part)
 		expectEq(t, body, string(data), fmt.Sprintf("Part %d body", i))
 		if err != nil {
 			t.Fatalf("Part %d: ReadAll failed: %v", i, err)
@@ -530,14 +529,14 @@ func TestNested(t *testing.T) {
 	if err != nil {
 		t.Fatalf("reading text/plain part: %v", err)
 	}
-	if b, err := ioutil.ReadAll(p); string(b) != "*body*\r\n" || err != nil {
+	if b, err := io.ReadAll(p); string(b) != "*body*\r\n" || err != nil {
 		t.Fatalf("reading text/plain part: got %q, %v", b, err)
 	}
 	p, err = mr2.NextPart()
 	if err != nil {
 		t.Fatalf("reading text/html part: %v", err)
 	}
-	if b, err := ioutil.ReadAll(p); string(b) != "<b>body</b>\r\n" || err != nil {
+	if b, err := io.ReadAll(p); string(b) != "<b>body</b>\r\n" || err != nil {
 		t.Fatalf("reading text/html part: got %q, %v", b, err)
 	}
 
@@ -850,7 +849,7 @@ Cases:
 				t.Errorf("in test %q, NextPart: %v", tt.name, err)
 				continue Cases
 			}
-			pbody, err := ioutil.ReadAll(p)
+			pbody, err := io.ReadAll(p)
 			if err != nil {
 				t.Errorf("in test %q, error reading part: %v", tt.name, err)
 				continue Cases
@@ -882,7 +881,7 @@ func partsFromReader(r *Reader) ([]headerBody, error) {
 		if err != nil {
 			return nil, fmt.Errorf("NextPart: %v", err)
 		}
-		pbody, err := ioutil.ReadAll(p)
+		pbody, err := io.ReadAll(p)
 		if err != nil {
 			return nil, fmt.Errorf("error reading part: %v", err)
 		}
diff --git a/src/mime/multipart/writer_test.go b/src/mime/multipart/writer_test.go
index b89b093fff..cfc0f09f37 100644
--- a/src/mime/multipart/writer_test.go
+++ b/src/mime/multipart/writer_test.go
@@ -6,7 +6,7 @@ package multipart
 
 import (
 	"bytes"
-	"io/ioutil"
+	"io"
 	"mime"
 	"net/textproto"
 	"strings"
@@ -51,7 +51,7 @@ func TestWriter(t *testing.T) {
 	if g, e := part.FormName(), "myfile"; g != e {
 		t.Errorf("part 1: want form name %q, got %q", e, g)
 	}
-	slurp, err := ioutil.ReadAll(part)
+	slurp, err := io.ReadAll(part)
 	if err != nil {
 		t.Fatalf("part 1: ReadAll: %v", err)
 	}
@@ -66,7 +66,7 @@ func TestWriter(t *testing.T) {
 	if g, e := part.FormName(), "key"; g != e {
 		t.Errorf("part 2: want form name %q, got %q", e, g)
 	}
-	slurp, err = ioutil.ReadAll(part)
+	slurp, err = io.ReadAll(part)
 	if err != nil {
 		t.Fatalf("part 2: ReadAll: %v", err)
 	}
@@ -134,7 +134,7 @@ func TestWriterBoundaryGoroutines(t *testing.T) {
 	// different goroutines. This was previously broken by
 	// https://codereview.appspot.com/95760043/ and reverted in
 	// https://codereview.appspot.com/117600043/
-	w := NewWriter(ioutil.Discard)
+	w := NewWriter(io.Discard)
 	done := make(chan int)
 	go func() {
 		w.CreateFormField("foo")