note that make test can be slow

diff --git a/README b/README
index fe4dfee78ee3127ec8b00a2fd386a072d51c183f..eef6fe8c69a4d8e0675d804852b77a2b7bde5f7b 100755 (executable)
--- a/README
+++ b/README
@@ -30,3 +30,5 @@ Tested under:
 License:
 
 Imager::Screenshot is distributed under the same terms as perl itself.
+
+Warning: make test on X11 over a remote connection will be slow.