diff --git a/nur_src/cli/Application.php b/nur_src/cli/Application.php
index 55d6989..65f975d 100644
--- a/nur_src/cli/Application.php
+++ b/nur_src/cli/Application.php
@@ -12,7 +12,7 @@ use nur\path;
 use nur\sery\app\launcher;
 use nur\sery\app\RunFile;
 use nur\sery\cl;
-use nur\sery\app\app;
+use nur\sery\app;
 use nur\sery\output\log as nlog;
 use nur\sery\output\msg as nmsg;
 use nur\sery\output\console as nconsole;
diff --git a/src/app/app.php b/src/app.php
similarity index 99%
rename from src/app/app.php
rename to src/app.php
index 5ddbfcb..0e1f04f 100644
--- a/src/app/app.php
+++ b/src/app.php
@@ -1,15 +1,12 @@
 <?php
-namespace nur\sery\app;
+namespace nur\sery;
 
-use nur\sery\A;
 use nur\sery\app\cli\Application;
-use nur\sery\cl;
-use nur\sery\ExitError;
+use nur\sery\app\LockFile;
+use nur\sery\app\RunFile;
 use nur\sery\os\path;
 use nur\sery\os\sh;
 use nur\sery\php\func;
-use nur\sery\str;
-use nur\sery\ValueException;
 
 class app {
   private static function isa_Application($app): bool {
diff --git a/src/app/RunFile.php b/src/app/RunFile.php
index 5b29e25..b6dbe48 100644
--- a/src/app/RunFile.php
+++ b/src/app/RunFile.php
@@ -2,6 +2,7 @@
 namespace nur\sery\app;
 
 use nur\sery\A;
+use nur\sery\app;
 use nur\sery\cl;
 use nur\sery\file\SharedFile;
 use nur\sery\os\path;
diff --git a/src/app/cli/include-launcher.php b/src/app/cli/include-launcher.php
index 3ca9f5e..47b4216 100644
--- a/src/app/cli/include-launcher.php
+++ b/src/app/cli/include-launcher.php
@@ -4,7 +4,7 @@
 # - NULIB_APP_app_params : paramètres du projet
 
 use nur\sery\os\path;
-use nur\sery\app\app;
+use nur\sery\app;
 
 if ($argc <= 1) die("invalid arguments");
 
diff --git a/src/app/cli/template-bg-launcher.php b/src/app/cli/template-bg-launcher.php
index a751c5c..fff54d5 100755
--- a/src/app/cli/template-bg-launcher.php
+++ b/src/app/cli/template-bg-launcher.php
@@ -7,7 +7,7 @@ require __DIR__.'/../vendor/autoload.php';
 # (par défaut c'est le répertoire bin/) et modifier les paramètres si nécessaire
 
 use nur\sery\tools\BgLauncherApp;
-use nur\sery\app\app;
+use nur\sery\app;
 
 # chemin vers le lanceur PHP
 const NULIB_APP_app_launcher = __DIR__.'/../_cli/_launcher.php';
diff --git a/src/os/sh.php b/src/os/sh.php
index 04e6075..59d2630 100644
--- a/src/os/sh.php
+++ b/src/os/sh.php
@@ -4,7 +4,7 @@ namespace nur\sery\os;
 use nur\sery\cl;
 use nur\sery\ExitError;
 use nur\sery\StateException;
-use nur\sery\app\app;
+use nur\sery\app;
 
 class sh {
   static final function _quote(string $value): string {
diff --git a/src/tools/BgLauncherApp.php b/src/tools/BgLauncherApp.php
index 2f1146f..971c993 100644
--- a/src/tools/BgLauncherApp.php
+++ b/src/tools/BgLauncherApp.php
@@ -7,7 +7,7 @@ use nur\sery\os\path;
 use nur\sery\os\proc\Cmd;
 use nur\sery\os\sh;
 use nur\sery\output\msg;
-use nur\sery\app\app;
+use nur\sery\app;
 use nur\sery\app\cli\Application;
 use nur\sery\app\RunFile;
 
diff --git a/src/tools/SteamTrainApp.php b/src/tools/SteamTrainApp.php
index 0e7e11d..b9e013a 100644
--- a/src/tools/SteamTrainApp.php
+++ b/src/tools/SteamTrainApp.php
@@ -4,7 +4,7 @@ namespace nur\sery\tools;
 use nur\sery\output\msg;
 use nur\sery\php\time\DateTime;
 use nur\sery\text\words;
-use nur\sery\app\app;
+use nur\sery\app;
 use nur\sery\app\cli\Application;
 
 class SteamTrainApp extends Application {
diff --git a/tests/app/LongTaskApp.php b/tests/app/LongTaskApp.php
deleted file mode 100644
index 1cb4234..0000000
--- a/tests/app/LongTaskApp.php
+++ /dev/null
@@ -1,20 +0,0 @@
-<?php
-namespace nur\sery\app;
-
-use nur\cli\Application;
-use nur\sery\output\msg;
-
-class LongTaskApp extends Application  {
-  const APPCODE = "long-task";
-  const USE_LOGFILE = true;
-  const USE_RUNFILE = true;
-  const USE_RUNLOCK = true;
-
-  function main() {
-    $step = 100;
-    while (--$step > 0) {
-      msg::print("step $step");
-      sleep(1);
-    }
-  }
-}
diff --git a/tests/wip/app/argsTest.php b/tests/app/argsTest.php
similarity index 97%
rename from tests/wip/app/argsTest.php
rename to tests/app/argsTest.php
index 8a8b1f1..b2bdef1 100644
--- a/tests/wip/app/argsTest.php
+++ b/tests/app/argsTest.php
@@ -1,6 +1,6 @@
 <?php
 
-namespace nur\sery\wip\app;
+namespace nur\sery\app;
 
 use nulib\tests\TestCase;
 use nur\sery\app\args;
diff --git a/tests/app/launcherTest.php b/tests/app/launcherTest.php
deleted file mode 100644
index d6d9efe..0000000
--- a/tests/app/launcherTest.php
+++ /dev/null
@@ -1,20 +0,0 @@
-<?php
-namespace nur\sery\app;
-
-use nulib\tests\TestCase;
-
-class launcherTest extends TestCase {
-  function testVerifix_args() {
-    self::assertSame([], launcher::verifix_args([]));
-    self::assertSame(["a"], launcher::verifix_args(["a"]));
-    self::assertSame(["a", "--b"], launcher::verifix_args(["a", "--b"]));
-    self::assertSame([], launcher::verifix_args(["a" => false]));
-    self::assertSame(["--a"], launcher::verifix_args(["a" => true]));
-    self::assertSame(["--a", "value"], launcher::verifix_args(["a" => "value"]));
-    self::assertSame(["--a", "52"], launcher::verifix_args(["a" => 52]));
-    self::assertSame(["--aa-bb", "value"], launcher::verifix_args(["aaBb" => "value"]));
-    self::assertSame(["--aa-bb", "value"], launcher::verifix_args(["aa-Bb" => "value"]));
-    self::assertSame(["--aa-bb", "value"], launcher::verifix_args(["aa_Bb" => "value"]));
-    self::assertSame(["---aa-bb", "value"], launcher::verifix_args(["_aa_Bb" => "value"]));
-  }
-}
diff --git a/tests/wip/app/app2Test.php b/tests/appTest.php
similarity index 85%
rename from tests/wip/app/app2Test.php
rename to tests/appTest.php
index a5bcf29..8fbac6a 100644
--- a/tests/wip/app/app2Test.php
+++ b/tests/appTest.php
@@ -1,12 +1,12 @@
 <?php
-namespace nur\sery\wip\app {
+namespace nur\sery {
   use nulib\tests\TestCase;
-  use nur\sery\wip\app\impl\config;
-  use nur\sery\wip\app\impl\myapp;
-  use nur\sery\wip\app\impl\MyApplication1;
-  use nur\sery\wip\app\impl\MyApplication2;
+  use nur\sery\impl\config;
+  use nur\sery\impl\myapp;
+  use nur\sery\impl\MyApplication1;
+  use nur\sery\impl\MyApplication2;
 
-  class app2Test extends TestCase {
+  class appTest extends TestCase {
     function testWith() {
       $projdir = config::get_projdir();
       $cwd = getcwd();
@@ -26,6 +26,7 @@ namespace nur\sery\wip\app {
         "vardir" => "$projdir/devel/var",
         "logdir" => "$projdir/devel/log",
         "profile" => "devel",
+        "appgroup" => null,
         "name" => "my-application1",
         "title" => null,
       ], $app1->getParams());
@@ -44,6 +45,7 @@ namespace nur\sery\wip\app {
         "vardir" => "$projdir/devel/var",
         "logdir" => "$projdir/devel/log",
         "profile" => "devel",
+        "appgroup" => null,
         "name" => "my-application2",
         "title" => null,
       ], $app2->getParams());
@@ -68,6 +70,7 @@ namespace nur\sery\wip\app {
         "vardir" => "$projdir/devel/var",
         "logdir" => "$projdir/devel/log",
         "profile" => "devel",
+        "appgroup" => null,
         "name" => "my-application1",
         "title" => null,
       ], myapp::get()->getParams());
@@ -86,6 +89,7 @@ namespace nur\sery\wip\app {
         "vardir" => "$projdir/devel/var",
         "logdir" => "$projdir/devel/log",
         "profile" => "devel",
+        "appgroup" => null,
         "name" => "my-application2",
         "title" => null,
       ], myapp::get()->getParams());
@@ -93,13 +97,14 @@ namespace nur\sery\wip\app {
   }
 }
 
-namespace nur\sery\wip\app\impl {
-  use nur\cli\Application2;
+namespace nur\sery\impl {
+
+  use nur\sery\app\cli\Application;
   use nur\sery\os\path;
-  use nur\sery\app\app;
+  use nur\sery\app;
 
   class config {
-    const PROJDIR = __DIR__.'/../../..';
+    const PROJDIR = __DIR__.'/..';
 
     static function get_projdir(): string {
       return path::abspath(self::PROJDIR);
@@ -112,13 +117,13 @@ namespace nur\sery\wip\app\impl {
     }
   }
 
-  class MyApplication1 extends Application2 {
+  class MyApplication1 extends Application {
     const PROJDIR = config::PROJDIR;
 
     function main() {
     }
   }
-  class MyApplication2 extends Application2 {
+  class MyApplication2 extends Application {
     const PROJDIR = null;
 
     function main() {
diff --git a/tests/wip/app/appTest.php b/tests/wip/app/appTest.php
deleted file mode 100644
index 4ea66a4..0000000
--- a/tests/wip/app/appTest.php
+++ /dev/null
@@ -1,18 +0,0 @@
-<?php
-
-namespace nur\sery\wip\app;
-
-use nulib\tests\TestCase;
-use nur\sery\app\app;
-
-class appTest extends TestCase {
-  function testVerifix_name() {
-    $name = 'my\package\MyApplication';
-    $verifix_name = function($name) {
-      self::verifix_name($name);
-      return $name;
-    };
-    $app = new app(null);
-    self::assertSame("my-application", $verifix_name->call($app, "$name"));
-  }
-}
diff --git a/wip_app/cli/Application.php b/wip_app/cli/Application.php
index 9c43c53..0f3d3d5 100644
--- a/wip_app/cli/Application.php
+++ b/wip_app/cli/Application.php
@@ -5,7 +5,7 @@ use Exception;
 use nur\cli\ArgsException;
 use nur\cli\ArgsParser;
 use nur\config;
-use nur\sery\app\app;
+use nur\sery\app;
 use nur\sery\app\RunFile;
 use nur\sery\ExitError;
 use nur\sery\output\console;