diff --git a/tests/cn/self_ref_init.unknown.c b/tests/cn/self_ref_init.unknown.c
new file mode 100644
index 000000000..d58091adb
--- /dev/null
+++ b/tests/cn/self_ref_init.unknown.c
@@ -0,0 +1,19 @@
+
+/* based on a problematic example from linux kvm/pgtable.c */
+
+struct str {
+  int x;
+  int y;
+};
+
+int f (int x)
+/*@ requires (0 <= x) && (x < 200) @*/
+{
+  struct str str_inst = {
+    .x = x + 2,
+    .y = str_inst.x + 3,
+  };
+
+  return str_inst.y;
+}
+
diff --git a/tests/run-cn.sh b/tests/run-cn.sh
index 787d58255..d94c88ce6 100755
--- a/tests/run-cn.sh
+++ b/tests/run-cn.sh
@@ -6,7 +6,7 @@ DIRNAME=$(dirname $0)
 
 set -e
 
-SUCC=$(find $DIRNAME/cn -name '*.c' | grep -v '\.error\.c')
+SUCC=$(find $DIRNAME/cn -name '*.c' | grep -v '\.error\.c' | grep -v '\.unknown\.c')
 
 for TEST in $SUCC
 do