diff --git a/ChangeLog b/ChangeLog
index 31774071ed..400a828599 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2007-05-23  Jan Schmidt  <thaytan@mad.scientist.com>
+
+	* tests/check/elements/playbin.c: (test_suburi_error_unknowntype):
+	Use /dev/zero instead of /dev/urandom to produce an invalid subtitle
+	file. Avoids flukes where the input gets typefound to some valid but
+	useless type.
+
 2007-05-22  Tim-Philipp Müller  <tim at centricular dot net>
 
 	* tests/check/Makefile.am:
diff --git a/tests/check/elements/playbin.c b/tests/check/elements/playbin.c
index 9ae0e1469f..d9978bb751 100644
--- a/tests/check/elements/playbin.c
+++ b/tests/check/elements/playbin.c
@@ -106,10 +106,10 @@ DEFINE_TEST (test_suburi_error_unknowntype)
   g_object_set (playbin, "video-sink", fakesink, NULL);
 
   /* suburi file format unknown: playbin should just ignore the suburi and
-   * preroll normally (if /dev/urandom does not exist, this test should behave
+   * preroll normally (if /dev/zero does not exist, this test should behave
    * the same as test_suburi_error_invalidfile() */
   g_object_set (playbin, "uri", "redvideo://", NULL);
-  g_object_set (playbin, "suburi", "file:///dev/urandom", NULL);
+  g_object_set (playbin, "suburi", "file:///dev/zero", NULL);
   fail_unless_equals_int (gst_element_set_state (playbin, GST_STATE_READY),
       GST_STATE_CHANGE_SUCCESS);
   fail_unless_equals_int (gst_element_set_state (playbin, GST_STATE_PAUSED),