diff --git a/config/config.exs b/config/config.exs
index c5c2b5b..bb906fb 100644
--- a/config/config.exs
+++ b/config/config.exs
@@ -5,6 +5,6 @@ import Config
 config :logger, :default_formatter,
     format: "$date $time [$level] $metadata $message\n",
     colors: [enabled: false],
-    metadata: [:mfa]
+    metadata: [:mfa, :pid]
 
 import_config "#{config_env()}.exs"
diff --git a/config/test.exs b/config/test.exs
index 6a7c3f7..5185143 100644
--- a/config/test.exs
+++ b/config/test.exs
@@ -3,7 +3,7 @@
 import Config
 
 config :logger, :default_handler, 
-  level: :info,
+  level: System.get_env("SCOPES_LOG_LEVEL", "info") |> String.to_atom,
   config: [
     file: ~c"test/log/scopes_test.log"
   ]
diff --git a/lib/csys/program.ex b/lib/csys/program.ex
index 88a6d9c..a144cc7 100644
--- a/lib/csys/program.ex
+++ b/lib/csys/program.ex
@@ -76,7 +76,7 @@ defmodule Scopes.CSys.Program do
     limit = args[:limit]
     data = Shape.data(msg)
     state = CSys.state(scope)
-    Logger.debug(Util.show [data, state.value, threshold, self()])
+    Logger.debug(Util.show [data, state.value, threshold])
     value_n = state.value + data.value
     if value_n >= threshold do
       value_out = limit && rem(value_n - 1, limit) + limit || value_n
diff --git a/test/csys_test.exs b/test/csys_test.exs
index b7cc7e9..c116f66 100644
--- a/test/csys_test.exs
+++ b/test/csys_test.exs
@@ -19,7 +19,7 @@ defmodule Scopes.CSysTest do
   describe "basic-program:" do
     test "minimal-b1" do
       env = Environ.setup(Program.prepare_basic(), Program.init_seq_b1())
-      Process.sleep(30)
+      Process.sleep(50)
       Environ.forward_value(env, [:csys, :c00, {0, 0}], 0)
       assert 0 = receive_data().value
       Environ.forward_value(env, [:csys, :s01, {1, 0}], 1)
@@ -33,7 +33,7 @@ defmodule Scopes.CSysTest do
 
     test "recursive-1" do
       env = Environ.setup(Program.prepare_basic(), Program.init_recursive_1())
-      Process.sleep(30)
+      Process.sleep(50)
       Environ.forward_value(env, [:csys, :s01, {1, 1}], 42)
       assert receive_data().value == 42
       Environ.forward_value(env, [:csys, :s01, {1, 1}], 47)