Improve instructions for when to add a test to the XFAIL list.

Print explanations for expected failures.

1 files changed, 3 insertions, 1 deletions

diff --git a/test/pixman-rotate.c b/test/pixman-rotate.c
index a5e52d2c9..af3b56103 100644
--- a/test/pixman-rotate.c
+++ b/test/pixman-rotate.c
@@ -76,5 +76,7 @@ draw (cairo_t *cr, int width, int height)
 int
 main (void)
 {
-    return cairo_test (&test, draw);
+    return cairo_test_expect_failure (&test, draw,
+				      "because of a known off-by-one bug "
+				      "when rotating a pixman image");
 }