diff --git a/halfapi/lib/domain_middleware.py b/halfapi/lib/domain_middleware.py
index 7da8bb7..dcc63ba 100644
--- a/halfapi/lib/domain_middleware.py
+++ b/halfapi/lib/domain_middleware.py
@@ -49,10 +49,10 @@ class DomainMiddleware(BaseHTTPMiddleware):
         if 'args' in request.scope:
             # Set the http headers "x-args-required" and "x-args-optional"
 
-            if 'required' in request.scope['args']:
+            if len(request.scope['args'].get('required', set())):
                 response.headers['x-args-required'] = \
                     ','.join(request.scope['args']['required'])
-            if 'optional' in request.scope['args']:
+            if len(request.scope['args'].get('optional', set())):
                 response.headers['x-args-optional'] = \
                     ','.join(request.scope['args']['optional'])
 
diff --git a/tests/dummy_domain/__init__.py b/tests/dummy_domain/__init__.py
index e69de29..7d55830 100644
--- a/tests/dummy_domain/__init__.py
+++ b/tests/dummy_domain/__init__.py
@@ -0,0 +1,5 @@
+ROUTES = {
+    '': {
+        'SUBROUTES': ['async']
+    }
+}
diff --git a/tests/dummy_domain/acl.py b/tests/dummy_domain/acl.py
index 70fea86..b4826c9 100644
--- a/tests/dummy_domain/acl.py
+++ b/tests/dummy_domain/acl.py
@@ -1,8 +1,11 @@
+from halfapi.lib import acl
+from halfapi.lib.acl import public
 from random import randint
 
-public = lambda *args: True
 
-random = lambda *args: randint(0,1) == 1
+def random():
+    return randint(0,1) == 1
 
-denied = lambda *args: False
+def denied():
+    return False
 
diff --git a/tests/dummy_domain/routers/arguments/__init__.py b/tests/dummy_domain/routers/arguments/__init__.py
new file mode 100644
index 0000000..5ea8f53
--- /dev/null
+++ b/tests/dummy_domain/routers/arguments/__init__.py
@@ -0,0 +1,38 @@
+from ... import acl
+from halfapi.logging import logger
+
+ACLS = {
+    'GET' : [
+        {
+            'acl':acl.public,
+            'args': {
+                'required': {
+                    'foo', 'bar'
+                },
+                'optional': {
+                    'x'
+                }
+            }
+            
+        },
+        {
+            'acl':acl.random,
+            'args': {
+                'required': {
+                    'foo', 'baz'
+                },
+                'optional': {
+                    'truebidoo'
+                }
+            }
+        },
+    ]
+}
+
+def get(halfapi, data):
+    """
+    description:
+        returns the configuration of the domain
+    """
+    logger.error('%s', data['foo'])
+    return {'foo': data['foo'], 'bar': data['bar']}
diff --git a/tests/dummy_domain/routers/async/__init__.py b/tests/dummy_domain/routers/async/__init__.py
new file mode 100644
index 0000000..7313776
--- /dev/null
+++ b/tests/dummy_domain/routers/async/__init__.py
@@ -0,0 +1,51 @@
+from halfapi.lib.responses import ORJSONResponse
+from ... import acl
+
+ROUTES = {
+    'abc/alphabet/{test:uuid}': {
+        'GET': [{'acl': acl.public}]
+    },
+    'abc/pinnochio': {
+        'GET': [{'acl': acl.public}]
+    },
+    'config': {
+        'GET': [{'acl': acl.public}]
+    },
+    'arguments': {
+        'GET': [{
+            'acl': acl.public,
+            'args': {
+                'required': {'foo', 'bar'},
+                'optional': {}
+            }
+        }]
+    },
+}
+
+async def get_abc_alphabet_TEST(request, *args, **kwargs):
+    """
+    description: Not implemented
+    """
+    raise NotImplementedError
+
+async def get_abc_pinnochio(request, *args, **kwargs):
+    """
+    description: Not implemented
+    """
+    raise NotImplementedError
+
+async def get_config(request, *args, **kwargs):
+    """
+    description: Not implemented
+    """
+    raise NotImplementedError
+
+async def get_arguments(request, *args, **kwargs):
+    """
+    description: Liste des datatypes.
+    """
+
+    return ORJSONResponse({
+        'foo': kwargs.get('foo'),
+        'bar': kwargs.get('bar')
+    })