diff --git a/README.md b/README.md
index a8ff2825..5762e3dd 100644
--- a/README.md
+++ b/README.md
@@ -292,6 +292,7 @@ Here are the Go packages that can be imported correctly:
 * [reflect](https://pkg.go.dev/reflect) (partially)
 * [time](https://pkg.go.dev/time) (partially)
 * [encoding/binary](https://pkg.go.dev/encoding/binary)
+* [encoding/hex](https://pkg.go.dev/encoding/hex)
 * [encoding/base32](https://pkg.go.dev/encoding/base32)
 * [encoding/base64](https://pkg.go.dev/encoding/base64)
 * [regexp](https://pkg.go.dev/regexp)
diff --git a/_cmptest/base64demo/base64.go b/_cmptest/base64demo/base64.go
index e80a6f42..0fbd1fa4 100644
--- a/_cmptest/base64demo/base64.go
+++ b/_cmptest/base64demo/base64.go
@@ -3,7 +3,9 @@ package main
 import (
 	"encoding/base32"
 	"encoding/base64"
+	"encoding/hex"
 	"fmt"
+	"log"
 )
 
 func base64Demo() {
@@ -30,7 +32,17 @@ func base32Demo() {
 	fmt.Printf("%q\n", dst)
 }
 
+func hexDemo() {
+	const s = "48656c6c6f20476f7068657221"
+	decoded, err := hex.DecodeString(s)
+	if err != nil {
+		log.Fatal(err)
+	}
+	fmt.Printf("%s\n", decoded)
+
+}
 func main() {
 	base64Demo()
 	base32Demo()
+	hexDemo()
 }