diff --git a/container/mts/audio_test.go b/container/mts/audio_test.go
index 9c1b8f03..8f71bbb7 100644
--- a/container/mts/audio_test.go
+++ b/container/mts/audio_test.go
@@ -38,7 +38,7 @@ import (
 type buffer bytes.Buffer
 
 func (b *buffer) Write(d []byte) (int, error) {
-	return b.Write(d)
+	return (*bytes.Buffer)(b).Write(d)
 }
 
 func (b *buffer) Close() error { return nil }
diff --git a/protocol/rtmp/rtmp_test.go b/protocol/rtmp/rtmp_test.go
index f2d661c5..1cf056cb 100644
--- a/protocol/rtmp/rtmp_test.go
+++ b/protocol/rtmp/rtmp_test.go
@@ -222,6 +222,8 @@ func (rs *rtmpSender) Write(p []byte) (int, error) {
 	return n, nil
 }
 
+func (rs *rtmpSender) Close() error { return nil }
+
 // TestFromFile tests streaming from an video file comprising raw H.264.
 // The test file is supplied via the RTMP_TEST_FILE environment variable.
 func TestFromFile(t *testing.T) {