diff --git a/tools/test/topos/regionabc.json b/tools/test/topos/regionabc.json
new file mode 100644
index 0000000..b5d15e0
--- /dev/null
+++ b/tools/test/topos/regionabc.json
@@ -0,0 +1,49 @@
+{
+  "devices": {
+    "of:0000000000000001": {
+      "basic": {
+        "name": "S1",
+        "gridX": 40,
+        "gridY": 20
+      }
+    },
+    "of:0000000000000002": {
+      "basic": {
+        "name": "S2",
+        "gridX": 40,
+        "gridY": 40
+      }
+    },
+
+    "of:0000000000000003": {
+      "basic": {
+        "name": "S3",
+        "gridX": 40,
+        "gridY": 20
+      }
+    },
+    "of:0000000000000004": {
+      "basic": {
+        "name": "S4",
+        "gridX": 40,
+        "gridY": 40
+      }
+    },
+
+    "of:0000000000000005": {
+      "basic": {
+        "name": "S5",
+        "gridX": 40,
+        "gridY": 20
+      }
+    },
+    "of:0000000000000006": {
+      "basic": {
+        "name": "S6",
+        "gridX": 40,
+        "gridY": 40
+      }
+    }
+
+  }
+}