diff --git a/gst/audiotestsrc/gstaudiotestsrc.c b/gst/audiotestsrc/gstaudiotestsrc.c
index 2a5a4747f1..558854032d 100644
--- a/gst/audiotestsrc/gstaudiotestsrc.c
+++ b/gst/audiotestsrc/gstaudiotestsrc.c
@@ -84,13 +84,19 @@ enum
 #endif
 
 static GstStaticPadTemplate gst_audio_test_src_src_template =
-GST_STATIC_PAD_TEMPLATE ("src",
+    GST_STATIC_PAD_TEMPLATE ("src",
     GST_PAD_SRC,
     GST_PAD_ALWAYS,
     GST_STATIC_CAPS ("audio/x-raw, "
         "format = (string) " FORMAT_STR ", "
         "layout = (string) interleaved, "
-        "rate = (int) [ 1, MAX ], " "channels = (int) [ 1, 2 ]")
+        "rate = (int) [ 1, MAX ], "
+        "channels = (int) 1; "
+        "audio/x-raw, "
+        "format = (string) " FORMAT_STR ", "
+        "layout = (string) interleaved, "
+        "rate = (int) [ 1, MAX ], "
+        "channels = (int) 2, " "channel-mask = (bitmask) 0x3")
     );
 
 #define gst_audio_test_src_parent_class parent_class