diff --git a/httptransport/discoveryhandler_test.go b/httptransport/discoveryhandler_test.go
index 50c28f5dd4..29f9c5ee93 100644
--- a/httptransport/discoveryhandler_test.go
+++ b/httptransport/discoveryhandler_test.go
@@ -4,7 +4,7 @@ import (
 	"bytes"
 	"context"
 	"encoding/json"
-	"io/ioutil"
+	"io"
 	"net/http"
 	"net/http/httptest"
 	"os"
@@ -35,7 +35,7 @@ func TestDiscoveryEndpoint(t *testing.T) {
 		t.Errorf("got: %q, want: %q", got, want)
 	}
 
-	buf, err := ioutil.ReadAll(resp.Body)
+	buf, err := io.ReadAll(resp.Body)
 	if err != nil {
 		t.Fatalf("failed to ready response body: %v", err)
 	}
diff --git a/httptransport/matcher_v1_test.go b/httptransport/matcher_v1_test.go
index 6e4ac76f83..6e3d16a6f3 100644
--- a/httptransport/matcher_v1_test.go
+++ b/httptransport/matcher_v1_test.go
@@ -3,7 +3,7 @@ package httptransport
 import (
 	"context"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net"
 	"net/http"
 	"net/http/httptest"
@@ -80,7 +80,7 @@ func testUpdateDiffMatcher(t *testing.T) {
 	defer resp.Body.Close()
 	got, want := resp.StatusCode, http.StatusOK
 	if got != want {
-		body, err := ioutil.ReadAll(resp.Body)
+		body, err := io.ReadAll(resp.Body)
 		if err != nil {
 			t.Log("could not read body of unexpected response")
 		}