test: amend some misuse of channel in test functions

Signed-off-by: Ziheng Liu <lzhfromustc@gmail.com>

distribution/xfer/download_test.go

@@ -407,12 +407,11 @@ func TestMaxDownloadAttempts(t *testing.T) {
 				})
 
 			progressChan := make(chan progress.Progress)
-			progressDone := make(chan struct{})
+			defer close(progressChan)
 
 			go func() {
 				for range progressChan {
 				}
-				close(progressDone)
 			}()
 
 			var currentDownloads int32

integration-cli/docker_cli_daemon_test.go

@@ -2125,7 +2125,7 @@ func (s *DockerDaemonSuite) TestDaemonStartWithoutColors(c *testing.T) {
 	infoLog := "\x1b[36mINFO\x1b"
 
 	b := bytes.NewBuffer(nil)
-	done := make(chan bool)
+	done := make(chan bool, 1)
 
 	p, tty, err := pty.Open()
 	assert.NilError(c, err)