diff --git a/plugins/module_utils/turbo/module.py b/plugins/module_utils/turbo/module.py
index baca864..5848a5c 100644
--- a/plugins/module_utils/turbo/module.py
+++ b/plugins/module_utils/turbo/module.py
@@ -25,6 +25,47 @@ def get_collection_name_from_path():
         return ".".join(ansiblez[8:].split(".")[:2])
 
 
+def expand_argument_specs_aliases(argument_spec):
+    """Returns a dict of accepted argument that includes the aliases"""
+    expanded_argument_specs = {}
+    for k, v in argument_spec.items():
+        for alias in [k] + v.get("aliases", []):
+            expanded_argument_specs[alias] = v
+    return expanded_argument_specs
+
+
+def prepare_args(argument_specs, params):
+    """Take argument_spec and the user params and prepare the final argument structure."""
+
+    def _keep_value(v, argument_specs, key, subkey=None):
+        if v is None:  # cannot be a valide parameter
+            return False
+        if key not in argument_specs:  # should never happen
+            return
+        if not subkey:  # level 1 parameter
+            return v != argument_specs[key].get("default")
+        elif subkey not in argument_specs[key]:  # Freeform
+            return True
+        elif isinstance(argument_specs[key][subkey], dict):
+            return v != argument_specs[key][subkey].get("default")
+        else:  # should never happen
+            return True
+
+    new_params = {}
+    for k, v in params.items():
+        if not _keep_value(v, argument_specs, k):
+            continue
+
+        if isinstance(v, dict):
+            new_params[k] = {
+                i: j for i, j in v.items() if _keep_value(j, argument_specs, k, i)
+            }
+        else:
+            new_params[k] = v
+    args = {"ANSIBLE_MODULE_ARGS": new_params}
+    return args
+
+
 class AnsibleTurboModule(ansible.module_utils.basic.AnsibleModule):
     embedded_in_server = False
     collection_name = None
@@ -47,43 +88,9 @@ def socket_path(self):
         abs_remote_tmp = expanduser(self._remote_tmp)
         return abs_remote_tmp + f"/turbo_mode.{self.collection_name}.socket"
 
-    def _get_argument_specs(self):
-        """Returns a dict of accepted argument that includes the aliases"""
-        argument_specs = {}
-        for k, v in self.argument_spec.items():
-            for alias in [k] + v.get("aliases", []):
-                argument_specs[alias] = v
-        return argument_specs
-
-    def _prepare_args(self):
-        argument_specs = self._get_argument_specs()
-
-        def _keep_value(v, argument_specs, key, subkey=None):
-            if v is None:  # cannot be a valide parameter
-                return False
-            if key not in argument_specs:  # should never happen
-                return
-            if not subkey:  # level 1 parameter
-                return v != argument_specs[key].get("default")
-            elif subkey not in argument_specs[key]:  # Freeform
-                return True
-            elif isinstance(argument_specs[key][subkey], dict):
-                return v != argument_specs[key][subkey].get("default")
-            else:  # should never happen
-                return True
-
-        new_params = {}
-        for k, v in self.params.items():
-            if not _keep_value(v, argument_specs, k):
-                continue
-
-            if isinstance(v, dict):
-                new_params[k] = {
-                    i: j for i, j in v.items() if _keep_value(j, argument_specs, k, i)
-                }
-            else:
-                new_params[k] = v
-        args = {"ANSIBLE_MODULE_ARGS": new_params}
+    def init_args(self):
+        argument_specs = expand_argument_specs_aliases(self.argument_spec)
+        args = prepare_args(argument_specs, self.params)
         for k in ansible.module_utils.basic.PASS_VARS:
             attribute = ansible.module_utils.basic.PASS_VARS[k][0]
             if not hasattr(self, attribute):
@@ -100,7 +107,7 @@ def run_on_daemon(self):
             socket_path=self.socket_path(), ttl=ttl
         ) as turbo_socket:
             ansiblez_path = sys.path[0]
-            args = self._prepare_args()
+            args = self.init_args()
             data = [
                 ansiblez_path,
                 json.dumps(args),
diff --git a/tests/unit/module_utils/test_turbo_module.py b/tests/unit/module_utils/test_turbo_module.py
index fa86243..b1c1dd3 100644
--- a/tests/unit/module_utils/test_turbo_module.py
+++ b/tests/unit/module_utils/test_turbo_module.py
@@ -14,6 +14,8 @@
 import ansible.module_utils.basic
 from ansible_collections.cloud.common.plugins.module_utils.turbo.module import (
     get_collection_name_from_path,
+    expand_argument_specs_aliases,
+    prepare_args,
 )
 import ansible_collections.cloud.common.plugins.module_utils.turbo.common as turbo_common
 
@@ -92,3 +94,35 @@ def test_connect(monkeypatch):
     turbo_socket = turbo_common.AnsibleTurboSocket(socket_path="/nowhere")
     assert turbo_socket.bind()
     mocked_socket.connect_assert_called_once_with("/nowhere")
+
+
+def test_expand_argument_specs_aliases():
+    argspec = {"foo": {"type": int, "aliases": ["bar"]}}
+    assert expand_argument_specs_aliases(argspec) == {
+        "foo": {"type": int, "aliases": ["bar"]},
+        "bar": {"type": int, "aliases": ["bar"]},
+    }
+
+
+def test_prepare_args():
+    argspec = {"foo": {"type": int}}
+    params = {"foo": 1}
+    assert prepare_args(argspec, params) == {"ANSIBLE_MODULE_ARGS": {"foo": 1}}
+
+
+def test_prepare_args_ignore_none():
+    argspec = {"foo": {"type": int}}
+    params = {"foo": None}
+    assert prepare_args(argspec, params) == {"ANSIBLE_MODULE_ARGS": {}}
+
+
+def test_prepare_args_subkey_freeform():
+    argspec = {"foo": {"type": dict, "default": {}}}
+    params = {"foo": {"bar": 1}}
+    assert prepare_args(argspec, params) == {"ANSIBLE_MODULE_ARGS": {"foo": {"bar": 1}}}
+
+
+def test_prepare_args_subkey_with_default():
+    argspec = {"foo": {"bar": {"default": 1}}}
+    params = {"foo": {"bar": 1}}
+    assert prepare_args(argspec, params) == {"ANSIBLE_MODULE_ARGS": {"foo": {}}}