diff --git a/src/rt_harness.erl b/src/rt_harness.erl
index cd573e9c4..2d1414760 100644
--- a/src/rt_harness.erl
+++ b/src/rt_harness.erl
@@ -17,6 +17,10 @@
 %% under the License.
 %%
 %% -------------------------------------------------------------------
+%% @doc rt_harness provides a level of indirection between the modules
+%% calling into the harness and the configured harness, resolving the call
+%% to the configured harness. Calls such as 'rt_harness:start(Node)' will
+%% be resolved to the configured harness.
 -module(rt_harness).
 
 -define(HARNESS_MODULE, (rt_config:get(rt_harness))).
diff --git a/src/rt_harness_util.erl b/src/rt_harness_util.erl
index 7963939c0..82c6a4abb 100644
--- a/src/rt_harness_util.erl
+++ b/src/rt_harness_util.erl
@@ -17,7 +17,8 @@
 %% under the License.
 %%
 %% -------------------------------------------------------------------
-
+%% @doc The purpose of rt_harness_util is to provide common functions
+%% to harness modules implementing the test_harness behaviour.
 -module(rt_harness_util).
 
 -include_lib("eunit/include/eunit.hrl").
diff --git a/src/rtdev.erl b/src/rtdev.erl
index fc504a543..375de6e47 100644
--- a/src/rtdev.erl
+++ b/src/rtdev.erl
@@ -25,26 +25,26 @@
          deploy_clusters/1,
          clean_data_dir/2,
          spawn_cmd/1,
-	 spawn_cmd/2,
-	 cmd/1,
-	 cmd/2,
-	 setup_harness/2,
-	 get_version/0,
-	 get_backends/0,
-	 set_backend/1,
-	 whats_up/0,
-	 get_ip/1,
-	 node_id/1,
-	 node_version/1,
-	 admin/2,
-	 riak/2,
-	 attach/2,
-	 attach_direct/2,
-	 console/2,
-	 update_app_config/2,
-	 teardown/0,
-	 set_conf/2,
-	 set_advanced_conf/2]).
+         spawn_cmd/2,
+         cmd/1,
+         cmd/2,
+         setup_harness/2,
+         get_version/0,
+         get_backends/0,
+         set_backend/1,
+         whats_up/0,
+         get_ip/1,
+         node_id/1,
+         node_version/1,
+         admin/2,
+         riak/2,
+         attach/2,
+         attach_direct/2,
+         console/2,
+         update_app_config/2,
+         teardown/0,
+         set_conf/2,
+         set_advanced_conf/2]).
 
 -compile(export_all).
 -include_lib("eunit/include/eunit.hrl").
diff --git a/src/rtperf.erl b/src/rtperf.erl
index ee109fffe..f0a68c65c 100644
--- a/src/rtperf.erl
+++ b/src/rtperf.erl
@@ -6,26 +6,26 @@
          deploy_clusters/1,
          clean_data_dir/2,
          spawn_cmd/1,
-	 spawn_cmd/2,
-	 cmd/1,
-	 cmd/2,
-	 setup_harness/2,
-	 get_version/0,
-	 get_backends/0,
-	 set_backend/1,
-	 whats_up/0,
-	 get_ip/1,
-	 node_id/1,
-	 node_version/1,
-	 admin/2,
-	 riak/2,
-	 attach/2,
-	 attach_direct/2,
-	 console/2,
-	 update_app_config/2,
-	 teardown/0,
-	 set_conf/2,
-	 set_advanced_conf/2]).
+         spawn_cmd/2,
+         cmd/1,
+         cmd/2,
+         setup_harness/2,
+         get_version/0,
+         get_backends/0,
+         set_backend/1,
+         whats_up/0,
+         get_ip/1,
+         node_id/1,
+         node_version/1,
+         admin/2,
+         riak/2,
+         attach/2,
+         attach_direct/2,
+         console/2,
+         update_app_config/2,
+         teardown/0,
+         set_conf/2,
+         set_advanced_conf/2]).
 
 -compile(export_all).
 
diff --git a/src/rtssh.erl b/src/rtssh.erl
index 4cbe4851e..69d97bbeb 100644
--- a/src/rtssh.erl
+++ b/src/rtssh.erl
@@ -6,27 +6,27 @@
          deploy_clusters/1,
          clean_data_dir/2,
          spawn_cmd/1,
-	 spawn_cmd/2,
-	 cmd/1,
-	 cmd/2,
-	 setup_harness/2,
+         spawn_cmd/2,
+         cmd/1,
+         cmd/2,
+         setup_harness/2,
          get_deps/0,
-	 get_version/0,
-	 get_backends/0,
-	 set_backend/1,
-	 whats_up/0,
-	 get_ip/1,
-	 node_id/1,
-	 node_version/1,
-	 admin/2,
-	 riak/2,
-	 attach/2,
-	 attach_direct/2,
-	 console/2,
-	 update_app_config/2,
-	 teardown/0,
-	 set_conf/2,
-	 set_advanced_conf/2]).
+         get_version/0,
+         get_backends/0,
+         set_backend/1,
+         whats_up/0,
+         get_ip/1,
+         node_id/1,
+         node_version/1,
+         admin/2,
+         riak/2,
+         attach/2,
+         attach_direct/2,
+         console/2,
+         update_app_config/2,
+         teardown/0,
+         set_conf/2,
+         set_advanced_conf/2]).
 
 -compile(export_all).
 -include_lib("eunit/include/eunit.hrl").
diff --git a/src/test_harness.erl b/src/test_harness.erl
index 53474841c..11006372f 100644
--- a/src/test_harness.erl
+++ b/src/test_harness.erl
@@ -17,6 +17,7 @@
 %% under the License.
 %%
 %% -------------------------------------------------------------------
+%% @doc behaviour for all test harnesses. 
 -module(test_harness).     
 
 -callback start(Node :: node()) -> 'ok'.