diff --git a/src/lib/ptree/ptree.lua b/src/lib/ptree/ptree.lua
index f1add44a15..c5cf1bffe2 100644
--- a/src/lib/ptree/ptree.lua
+++ b/src/lib/ptree/ptree.lua
@@ -10,7 +10,6 @@ local lib = require("core.lib")
 local shm = require("core.shm")
 local timer = require("core.timer")
 local worker = require("core.worker")
-local cltable = require("lib.cltable")
 local cpuset = require("lib.cpuset")
 local rrd = require("lib.rrd")
 local scheduling = require("lib.scheduling")
diff --git a/src/lib/ptree/support.lua b/src/lib/ptree/support.lua
index aa14fc3f62..5488deec49 100644
--- a/src/lib/ptree/support.lua
+++ b/src/lib/ptree/support.lua
@@ -8,7 +8,6 @@ local path_mod = require("lib.yang.path")
 local path_data = require("lib.yang.path_data")
 local yang = require("lib.yang.yang")
 local data = require("lib.yang.data")
-local cltable = require("lib.cltable")
 
 function compute_parent_paths(path)
    local function sorted_keys(t)
@@ -43,19 +42,16 @@ local function add_child_objects(accum, grammar, config)
       table.insert(accum, config)
       return visit(grammar, config)
    end
-   function visitor.table(grammar, config)
+   function visitor.list(grammar, config)
+      if grammar.value_ctype then
+         -- List entries are raw data and do not contain children with
+         -- distinct identities.
+         return
+      end
       local child_grammar = {type="struct", members=grammar.values,
                              ctype=grammar.value_ctype}
-      if not grammar.key_ctype or grammar.native_key then
-         for k, v in pairs(config) do visit_child(child_grammar, v) end
-      elseif grammar.key_ctype and grammar.value_ctype then
-      -- Ctables are raw data, and raw data doesn't contain children
-      -- with distinct identity.
-         return
-      elseif grammar.key_ctype then
-         for k, v in cltable.pairs(config) do visit_child(child_grammar, v) end
-      else
-         error("unreachable")
+      for _, entry in ipairs(config) do
+         visit_child(child_grammar, entry)
       end
    end
    function visitor.array(grammar, config)
@@ -88,7 +84,7 @@ local function compute_objects_maybe_updated_in_place (schema, config,
       if subgrammar.type == 'scalar' then return objs end
       table.insert(objs, getter(config))
       -- Members of raw data can't be updated in place either.
-      if subgrammar.type == 'table' then
+      if subgrammar.type == 'list' then
          if subgrammar.key_ctype and subgrammar.value_ctype then return objs end
       elseif subgrammar.type == 'struct' then
          if subgrammar.ctype then return objs end
diff --git a/src/lib/yang/state.lua b/src/lib/yang/state.lua
index 45096a5336..7846881537 100644
--- a/src/lib/yang/state.lua
+++ b/src/lib/yang/state.lua
@@ -109,6 +109,7 @@ state_reader_from_schema_by_name = util.memoize(state_reader_from_schema_by_name
 
 function selftest ()
    print("selftest: lib.yang.state")
+   local ffi = require("ffi")
    local simple_router_schema_src = [[module snabb-simple-router {
       namespace snabb:simple-router;
       prefix simple-router;
@@ -152,26 +153,18 @@ function selftest ()
          uses "detailed-counters";
       }
    }]]
-   local function table_length(tbl)
-      local rtn = 0
-      for k,v in pairs(tbl) do rtn = rtn + 1 end
-      return rtn
-   end
-   local function in_array(needle, haystack)
-      for _, i in pairs(haystack) do if needle == i then return true end end
-         return false
-   end
-
    local simple_router_schema = yang.load_schema(simple_router_schema_src,
                                                  "state-test")
    local reader = state_reader_from_schema(simple_router_schema)
-   local state = reader({})
-   assert(0 == state.state.total_packets)
-   assert(0 == state.state.dropped_packets)
-   assert(0 == state.detailed_state.dropped_wrong_route)
-   assert(0 == state.detailed_state.dropped_not_permitted)
-   -- Would like to assert "state.routes == nil" but state is actually
-   -- a cdata object, and trying to access the non-existent routes
-   -- property throws an error.
+   local state = reader({
+      ['total-packets'] = ffi.new("struct counter", {c=1}),
+      ['dropped-packets'] = ffi.new("struct counter", {c=2}),
+      ['dropped-wrong-route'] = ffi.new("struct counter", {c=3}),
+      ['dropped-not-permitted'] = ffi.new("struct counter", {c=4})
+   })
+   assert(1 == state.state.total_packets)
+   assert(2 == state.state.dropped_packets)
+   assert(3 == state.detailed_state.dropped_wrong_route)
+   assert(4 == state.detailed_state.dropped_not_permitted)
    print('selftest: ok')
 end