Index: trunk/Nebulous/nebclient/tests/tests.c
===================================================================
--- trunk/Nebulous/nebclient/tests/tests.c	(revision 4636)
+++ trunk/Nebulous/nebclient/tests/tests.c	(revision 4639)
@@ -21,5 +21,5 @@
     char            *key = "foobarbaz";
 
-    TESTS(16);
+    TESTS(17);
 
     if (getenv("NEBULOUS_SERVER")) {
@@ -43,4 +43,6 @@
 
     OK(nebReplicate(server, key, NULL, NULL), "replicate object");
+
+    OK(nebOpen(server, key, NEB_WRITE) < 0, "write to object with multiple instances");
 
     OK(nebCull(server, key), "cull object");