diff --git a/tools/test/topos/dual.json b/tools/test/topos/dual.json
index fa86e0ea1a..87a22db8a1 100644
--- a/tools/test/topos/dual.json
+++ b/tools/test/topos/dual.json
@@ -1,7 +1,19 @@
 {
   "devices": {
-    "of:0000000000000001": { "basic": { "name": "SW-A" }},
-    "of:0000000000000002": { "basic": { "name": "SW-B" }}
+    "of:0000000000000001": {
+      "basic": {
+        "name": "SW-A",
+        "latitude": 43.3700,
+        "longitude": -104.6572
+      }
+    },
+    "of:0000000000000002": {
+      "basic": {
+        "name": "SW-B",
+        "latitude": 38.5189,
+        "longitude": -109.2781
+      }
+    }
   },
 
   "hosts": {
@@ -14,7 +26,9 @@
         "ips": [
           "10.0.0.1"
         ],
-        "name": "Host-X"
+        "name": "Host-X",
+        "latitude": 39.9444,
+        "longitude":  -91.7822
       }
     }
   }
diff --git a/tools/test/topos/dual.py b/tools/test/topos/dual.py
index f0d7524136..d795a37c51 100644
--- a/tools/test/topos/dual.py
+++ b/tools/test/topos/dual.py
@@ -14,18 +14,18 @@ class DualTopo( Topo ):
         Topo.__init__( self )
 
         # add nodes, switches first...
-        LONDON = self.addSwitch( 's1' )
-        BRISTL = self.addSwitch( 's2' )
+        SWA = self.addSwitch( 's1' )
+        SWB = self.addSwitch( 's2' )
 
         # ... and now hosts
-        LONDON_host = self.addHost( 'h1' )
+        HOSTX = self.addHost( 'h1' )
 
         # add edges between switch and corresponding host
-        self.addLink( LONDON, LONDON_host )
-        self.addLink( BRISTL, LONDON_host )
+        self.addLink( SWA, HOSTX )
+        self.addLink( SWB, HOSTX )
 
         # add edges between switches
-        self.addLink( LONDON, BRISTL, bw=10, delay='1.0ms')
+        self.addLink( SWA, SWB, bw=10, delay='1.0ms' )
 
 
 topos = { 'dual': ( lambda: DualTopo() ) }