diff --git a/src/encoding/json/scanner.go b/src/encoding/json/scanner.go
index 05218f9..9dc1903 100644
--- a/src/encoding/json/scanner.go
+++ b/src/encoding/json/scanner.go
@@ -49,12 +49,6 @@
 
 func (e *SyntaxError) Error() string { return e.msg }
 
-// Is returns true if target is a SyntaxError.
-func (e *SyntaxError) Is(target error) bool {
-	_, ok := target.(*SyntaxError)
-	return ok
-}
-
 // A scanner is a JSON scanning state machine.
 // Callers call scan.reset and then pass bytes in one at a time
 // by calling scan.step(&scan, c) for each byte.
diff --git a/src/encoding/json/scanner_test.go b/src/encoding/json/scanner_test.go
index c12d9bf..3737516 100644
--- a/src/encoding/json/scanner_test.go
+++ b/src/encoding/json/scanner_test.go
@@ -6,8 +6,6 @@
 
 import (
 	"bytes"
-	"errors"
-	"fmt"
 	"math"
 	"math/rand"
 	"reflect"
@@ -203,13 +201,6 @@
 	}
 }
 
-func TestSyntaxErrorIs(t *testing.T) {
-	err := fmt.Errorf("apackage: %w: failed to parse struct", &SyntaxError{"some error", 43})
-	if !errors.Is(err, &SyntaxError{}) {
-		t.Fatalf("%v should be unwrapped to a SyntaxError", err)
-	}
-}
-
 func diff(t *testing.T, a, b []byte) {
 	for i := 0; ; i++ {
 		if i >= len(a) || i >= len(b) || a[i] != b[i] {