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diff --git a/lib/syntax_tools/examples/merl/basic_test.erl b/lib/syntax_tools/examples/merl/basic_test.erl
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+%% ---------------------------------------------------------------------
+%% Licensed under the Apache License, Version 2.0 (the "License"); you may
+%% not use this file except in compliance with the License. You may obtain
+%% a copy of the License at <http://www.apache.org/licenses/LICENSE-2.0>
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+%%
+%% @author Richard Carlsson <[email protected]>
+%% @copyright 2012 Richard Carlsson
+%% @doc Tests. For including in another module.
+
+%-module(basic_test).
+%-import(basic, run/1)
+
+-export([basic_fib/1]).
+
+-include_lib("eunit/include/eunit.hrl").
+
+basics_test_() ->
+    [?_assertEqual(42, run(1,[{1,{stop, 42}}])),
+     ?_assertEqual("hello", run(1,[{1,{stop,"hello"}}])),
+     ?_assertEqual(0, run(1,[{1,{print, "hello ~w", [42]}}])),
+     ?_assertEqual(5, run(1,[{1,{stop, {plus, 2, 3}}}])),
+     ?_assertEqual(5, run(1,[{1,{stop,{plus, 8, -3}}}])),
+     ?_assertEqual(0, run(1,[{1,{stop,{equal, 0, 1}}}])),
+     ?_assertEqual(1, run(1,[{1,{stop,{equal, 1, 1}}}])),
+     ?_assertEqual(0, run(1,[{1,{stop,{gt, 0, 1}}}])),
+     ?_assertEqual(0, run(1,[{1,{stop,{gt, 1, 1}}}])),
+     ?_assertEqual(1, run(1,[{1,{stop,{gt, 2, 1}}}])),
+     ?_assertEqual(0, run(1,[{1,{stop,{knot, 42}}}])),
+     ?_assertEqual(1, run(1,[{1,{stop,{knot, 0}}}])),
+     ?_assertEqual(42, run(1,[{1,{set, x, 42}}, {2,{stop,x}}])),
+     ?_assertEqual(17, run(1,[{1,{iff, 1, 2, 3}},
+                              {2,{stop, 17}},
+                              {3,{stop, 42}}])),
+     ?_assertEqual(42, run(1,[{1,{iff, 0, 2, 3}},
+                              {2,{stop, 17}},
+                              {3,{stop, 42}}])),
+     ?_assertEqual(17, run(1,[{1,{iff, 1, 2, 3}},
+                              {2,{stop, 17}},
+                              {3,{stop, -1}}])),
+     ?_assertEqual(42, run(1,[{1,{iff, 0, 2, 3}},
+                              {2,{stop, -1}},
+                              {3,{stop, 42}}]))
+
+
+    ].
+
+
+fib_test_() ->
+    [?_assertEqual(fib(N), basic_fib(N)) || N <- lists:seq(1,15)
+    ].
+
+
+fib(N) when N > 1 ->
+    fib(N-1) + fib(N-2);
+fib(_) ->
+    1.
+
+basic_fib(N) ->
+    run(1,
+        [{1,{set,x,0}},
+         {2,{set,a,1}},
+         {3,{set,b,0}},
+         {10,{iff, {equal, x, N}, 20, 30}},
+         {20,{stop,a}},
+         {30,{print,"~w, ~w, ~w\n",[x,a,b]}},
+         {31,{set,t,a}},
+         {32,{set,a,{plus,a,b}}},
+         {33,{set,b,t}},
+         {34,{set,x,{plus,x,1}}},
+         {40,{goto,10}}
+         ]).