diff --git a/.github/workflows/go.yml b/.github/workflows/go.yml
index 3f8094c..15b0e8f 100644
--- a/.github/workflows/go.yml
+++ b/.github/workflows/go.yml
@@ -7,14 +7,18 @@ on:
 jobs:
 
   build:
-    name: Build
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        go: ['1.15', '1.16', '1.17', '1.18', '1.19', '1.20']
+    name: Go ${{ matrix.go }} sample
+
     steps:
 
-    - name: Set up Go 1.14
+    - name: Set up Go 1.13
       uses: actions/setup-go@v1
       with:
-        go-version: 1.14
+        go-version: ${{ matrix.go }}
       id: go
 
     - name: Check out code into the Go module directory
diff --git a/hcutil/hcutil_test.go b/hcutil/hcutil_test.go
index 86613e6..d08fd18 100644
--- a/hcutil/hcutil_test.go
+++ b/hcutil/hcutil_test.go
@@ -3,7 +3,6 @@ package hcutil
 import (
 	"context"
 	"errors"
-	"io"
 	"io/ioutil"
 	"net"
 	"net/http"
@@ -84,7 +83,7 @@ func TestProxy(t *testing.T) {
 	resp, err := c.Do(req)
 	assert.NoError(t, err)
 
-	res, err := io.ReadAll(resp.Body)
+	res, err := ioutil.ReadAll(resp.Body)
 	assert.NoError(t, err)
 
 	s = string(res)
@@ -129,7 +128,7 @@ func TestUnixSocket(t *testing.T) {
 	resp, err := c.Do(req)
 
 	assert.NoError(t, err)
-	all, err := io.ReadAll(resp.Body)
+	all, err := ioutil.ReadAll(resp.Body)
 	assert.NoError(t, err)
 	s = string(all)