diff --git a/doc/progs/run.go b/doc/progs/run.go
index baef3f79f9..8ac75cdcff 100644
--- a/doc/progs/run.go
+++ b/doc/progs/run.go
@@ -105,7 +105,7 @@ func test(tmpdir, file, want string) error {
 
 	// Canonicalize output.
 	out = bytes.TrimRight(out, "\n")
-	out = bytes.Replace(out, []byte{'\n'}, []byte{' '}, -1)
+	out = bytes.ReplaceAll(out, []byte{'\n'}, []byte{' '})
 
 	// Check the result.
 	match, err := regexp.Match(want, out)
diff --git a/src/cmd/cover/cover_test.go b/src/cmd/cover/cover_test.go
index 8a56e39011..1c252e6e45 100644
--- a/src/cmd/cover/cover_test.go
+++ b/src/cmd/cover/cover_test.go
@@ -179,7 +179,7 @@ func TestCover(t *testing.T) {
 	}
 	lines := bytes.Split(file, []byte("\n"))
 	for i, line := range lines {
-		lines[i] = bytes.Replace(line, []byte("LINE"), []byte(fmt.Sprint(i+1)), -1)
+		lines[i] = bytes.ReplaceAll(line, []byte("LINE"), []byte(fmt.Sprint(i+1)))
 	}
 
 	// Add a function that is not gofmt'ed. This used to cause a crash.
diff --git a/src/cmd/go/internal/version/version.go b/src/cmd/go/internal/version/version.go
index 056db7bf9e..c2de8d326d 100644
--- a/src/cmd/go/internal/version/version.go
+++ b/src/cmd/go/internal/version/version.go
@@ -138,7 +138,7 @@ func scanFile(file string, info os.FileInfo, mustPrint bool) {
 
 	fmt.Printf("%s: %s\n", file, vers)
 	if *versionM && mod != "" {
-		fmt.Printf("\t%s\n", strings.Replace(mod[:len(mod)-1], "\n", "\n\t", -1))
+		fmt.Printf("\t%s\n", strings.ReplaceAll(mod[:len(mod)-1], "\n", "\n\t"))
 	}
 }
 
diff --git a/src/runtime/mkpreempt.go b/src/runtime/mkpreempt.go
index 1fe77663b9..44dea22ef3 100644
--- a/src/runtime/mkpreempt.go
+++ b/src/runtime/mkpreempt.go
@@ -131,7 +131,7 @@ func header(arch string) {
 
 func p(f string, args ...interface{}) {
 	fmted := fmt.Sprintf(f, args...)
-	fmt.Fprintf(out, "\t%s\n", strings.Replace(fmted, "\n", "\n\t", -1))
+	fmt.Fprintf(out, "\t%s\n", strings.ReplaceAll(fmted, "\n", "\n\t"))
 }
 
 func label(l string) {