diff --git a/tests/check/elements/dtmf.c b/tests/check/elements/dtmf.c
index aeaf1b8dd0..6330a3d99b 100644
--- a/tests/check/elements/dtmf.c
+++ b/tests/check/elements/dtmf.c
@@ -119,6 +119,7 @@ check_buffers_duration (GstClockTime expected_duration)
 
     fail_unless (GST_BUFFER_DURATION_IS_VALID (buf));
     duration += GST_BUFFER_DURATION (buf);
+    gst_buffer_unref (buf);
   }
 
   fail_unless (duration == expected_duration);