diff --git a/common/utils/StringUtils.cpp b/common/utils/StringUtils.cpp
index 9068743bf..749ad7967 100644
--- a/common/utils/StringUtils.cpp
+++ b/common/utils/StringUtils.cpp
@@ -488,18 +488,22 @@ void CapitalizeLabel(string *s) {
 void CustomCapitalizeLabel(string *s) {
   // Remember to update the Doxygen in include/ola/StringUtils.h too
   static const char* const transforms[] = {
+    "asc",
     "dhcp",
     "dmx",
     "dns",
     "ip",
     "ipv4",  // Should really be IPv4 probably, but better than nothing
     "ipv6",  // Should really be IPv6 probably, but better than nothing
+    "json",
     "led",
     "mdmx",  // City Theatrical, should really be mDMX, but better than nothing
+    "nsc",
     "pdl",
     "pid",
     "rdm",
     "uid",
+    "url",
     NULL
   };
   const size_t size = s->size();
diff --git a/include/ola/StringUtils.h b/include/ola/StringUtils.h
index c1bd47ca0..0f7675d39 100644
--- a/include/ola/StringUtils.h
+++ b/include/ola/StringUtils.h
@@ -490,16 +490,20 @@ void CapitalizeLabel(std::string *s);
  *
  * @param s a string to transform.
  * The following are capitalized:
+ *   - asc
  *   - dhcp
  *   - dmx
  *   - dns
  *   - ip
  *   - ipv4
  *   - ipv6
+ *   - json
  *   - led
  *   - mdmx
+ *   - nsc
  *   - rdm
  *   - uid
+ *   - url
  */
 void CustomCapitalizeLabel(std::string *s);
 
diff --git a/tools/rdm/TestDefinitions.py b/tools/rdm/TestDefinitions.py
index e97b0f58b..6f793d1a0 100644
--- a/tools/rdm/TestDefinitions.py
+++ b/tools/rdm/TestDefinitions.py
@@ -7280,9 +7280,11 @@ def VerifyResult(self, response, fields):
       return
 
     interfaces = []
+    count_by_interface = {}
 
     for interface in fields['interfaces']:
       interface_id = interface['interface_identifier']
+      count_by_interface[interface_id] = count_by_interface.get(interface_id, 0) + 1
       if (interface_id < RDM_INTERFACE_INDEX_MIN or
           interface_id > RDM_INTERFACE_INDEX_MAX):
         self.AddWarning('Interface index %d is outside allowed range (%d to '
@@ -7297,6 +7299,12 @@ def VerifyResult(self, response, fields):
                          'interface %d' %
                          (interface['interface_hardware_type'], interface_id))
 
+    # Check for duplicate interfaces
+    for interface, count in count_by_interface.items():
+      if count > 1:
+        self.AddAdvisory('Interface %s listed %d times in list interfaces' %
+                         (interface, count))
+
     self.SetProperty(self.PROVIDES[0], interfaces)