diff --git a/web/gui/src/test/_karma/ev/mojo/ev_31_addLink_C_B.json b/web/gui/src/test/_karma/ev/mojo/ev_31_addLink_C_B.json
new file mode 100644
index 0000000..c36aa3e
--- /dev/null
+++ b/web/gui/src/test/_karma/ev/mojo/ev_31_addLink_C_B.json
@@ -0,0 +1,13 @@
+{
+  "event": "addLink",
+  "payload": {
+    "id": "of:0000ffffffff000c/11-of:0000ffffffff000b/12",
+    "type": "direct",
+    "online": true,
+    "linkWidth": 2,
+    "src": "of:0000ffffffff000c",
+    "srcPort": "11",
+    "dst": "of:0000ffffffff000b",
+    "dstPort": "12"
+  }
+}