@@ -135,7 +135,7 @@ func (s *DockerCLIInspectSuite) TestInspectTypeFlagWithInvalidValue(c *testing.T

 	out, exitCode, err := dockerCmdWithError("inspect", "--type=foobar", "busybox")

 	assert.Assert(c, err != nil, "%d", exitCode)

-	assert.Equal(c, exitCode, 1, fmt.Sprintf("%s", err))

+	assert.Equal(c, exitCode, 1, err)

 	assert.Assert(c, strings.Contains(out, "not a valid value for --type"))

 }

@@ -2,7 +2,6 @@ package container // import "github.com/docker/docker/integration/container"

 import (

 	"context"

-	"fmt"

 	"os/exec"

 	"regexp"

 	"sort"

@@ -84,9 +83,9 @@ func TestCheckpoint(t *testing.T) {

 	err = client.CheckpointCreate(ctx, cID, cptOpt)

 	if err != nil {

 		// An error can contain a path to a dump file

-		t.Logf("%s", err)

+		t.Log(err)

 		re := regexp.MustCompile("path= (.*): ")

-		m := re.FindStringSubmatch(fmt.Sprintf("%s", err))

+		m := re.FindStringSubmatch(err.Error())

 		if len(m) >= 2 {

 			dumpLog := m[1]

 			t.Logf("%s", dumpLog)