diff --git a/src/main/python/ddadevops/domain/__init__.py b/src/main/python/ddadevops/domain/__init__.py
index 4bd528a..8121e0d 100644
--- a/src/main/python/ddadevops/domain/__init__.py
+++ b/src/main/python/ddadevops/domain/__init__.py
@@ -1,4 +1,4 @@
-from .common import Validateable, DnsRecord, Devops, BuildType
+from .common import Validateable, DnsRecord, Devops, BuildType, MixinType
 from .devops_factory import DevopsFactory
 from .image import Image
 from .c4k import C4k
diff --git a/src/test/python/release_mixin/test_release_mixin.py b/src/test/python/release_mixin/test_release_mixin.py
deleted file mode 100644
index 62a890d..0000000
--- a/src/test/python/release_mixin/test_release_mixin.py
+++ /dev/null
@@ -1,80 +0,0 @@
-import pytest as pt
-from pathlib import Path
-from pybuilder.core import Project
-
-from src.main.python.ddadevops.release_mixin import ReleaseMixin
-from src.main.python.ddadevops.infrastructure.release_mixin import GitApi, EnvironmentApi
-from src.main.python.ddadevops.domain import Devops, ReleaseContext, Release
-
-from .helper import Helper
-
-MAIN_BRANCH = 'main'
-STAGE = 'test'
-PROJECT_ROOT_PATH = '.'
-MODULE = 'test'
-BUILD_DIR_NAME = "build_dir"
-
-def change_test_dir( tmp_path: Path, monkeypatch: pt.MonkeyPatch):
-    monkeypatch.chdir(tmp_path)
-
-class MyBuild(ReleaseMixin):
-    pass
-
-def initialize_with_object(project, CONFIG_FILE):
-    project.build_depends_on('ddadevops>=3.1.2')
-    devops = Devops(STAGE, PROJECT_ROOT_PATH, MODULE, "release_test", BUILD_DIR_NAME)
-    release = Release(devops, MAIN_BRANCH, CONFIG_FILE)
-    build = MyBuild(project, release)
-    return build
-
-def test_release_mixin_git(tmp_path: Path, monkeypatch: pt.MonkeyPatch):
-
-    # init
-    th = Helper()
-    th.copy_files(th.TEST_FILE_PATH, tmp_path)
-    th.TEST_FILE_PATH = tmp_path / th.TEST_FILE_NAME
-
-    change_test_dir(tmp_path, monkeypatch)
-    project = Project(tmp_path)
-
-    git_api = GitApi()
-    git_api.init()
-    git_api.set_user_config("ex.ample@mail.com", "Ex Ample")
-    git_api.add_file(th.TEST_FILE_NAME)
-    git_api.commit("MAJOR release")
-
-    build = initialize_with_object(project, th.TEST_FILE_PATH)
-    build.prepare_release()
-    release_version = build.release_repo.version_repository.get_version()
-
-    # test
-    assert "124.0.1-SNAPSHOT" in release_version.get_version_string()
-
-def test_release_mixin_environment(tmp_path: Path, monkeypatch: pt.MonkeyPatch):
-
-    # init
-    th = Helper()
-    th.copy_files(th.TEST_FILE_PATH, tmp_path)
-    th.TEST_FILE_PATH = tmp_path / th.TEST_FILE_NAME
-
-    change_test_dir(tmp_path, monkeypatch)
-    project = Project(tmp_path)
-
-    git_api = GitApi()
-    git_api.init()
-    git_api.set_user_config("ex.ample@mail.com", "Ex Ample")
-    git_api.add_file(th.TEST_FILE_NAME)
-    git_api.commit("Commit Message")
-
-    environment_api = EnvironmentApi()
-    environment_api.set("DDADEVOPS_RELEASE_TYPE", "MAJOR")
-
-    build = initialize_with_object(project, th.TEST_FILE_PATH)
-    build.prepare_release()
-    release_version = build.release_repo.version_repository.get_version()
-
-    # test
-    assert "124.0.1-SNAPSHOT" in release_version.get_version_string()
-
-    # tear down
-    environment_api.set("DDADEVOPS_RELEASE_TYPE", "")
diff --git a/src/test/python/resource_helper.py b/src/test/python/resource_helper.py
new file mode 100644
index 0000000..7de20b5
--- /dev/null
+++ b/src/test/python/resource_helper.py
@@ -0,0 +1,12 @@
+from pathlib import Path
+from src.main.python.ddadevops.infrastructure import ExecutionApi
+
+class ResourceHelper():
+    def __init__(self, file_name = 'config.json'):
+        self.TEST_FILE_NAME = file_name
+        self.TEST_FILE_ROOT = Path('src/test/resources/')
+        self.TEST_FILE_PATH = self.TEST_FILE_ROOT / self.TEST_FILE_NAME
+
+    def copy_files(self, source: Path, target: Path):
+        api = ExecutionApi()
+        api.execute(f"cp {source} {target}")
diff --git a/src/test/python/test_devops_build.py b/src/test/python/test_devops_build.py
index 006d46b..c107058 100644
--- a/src/test/python/test_devops_build.py
+++ b/src/test/python/test_devops_build.py
@@ -1,21 +1,20 @@
 import os
 from pybuilder.core import Project
-from src.main.python.ddadevops.domain.common import Devops
 from src.main.python.ddadevops.devops_build import DevopsBuild
 from .domain.test_helper import devops_config
 
 
-class MyDevopsBuild(DevopsBuild):
-    pass
-
-
 def test_devops_build(tmp_path):
-    build_dir = "build"
-    project_name = "testing-project"
-    module_name = "c4k-test"
     tmp_path_str = str(tmp_path)
 
-    project = Project(tmp_path_str, name=project_name)
-    devops_build = DevopsBuild(project, devops_config({}))
+    project = Project(tmp_path_str, name="name")
+    devops_build = DevopsBuild(
+        project,
+        devops_config(
+            {
+                "project_root_path": tmp_path_str,
+            }
+        ),
+    )
     devops_build.initialize_build_dir()
     assert os.path.exists(f"{devops_build.build_path()}")
diff --git a/src/test/python/test_release_mixin.py b/src/test/python/test_release_mixin.py
new file mode 100644
index 0000000..b0772a3
--- /dev/null
+++ b/src/test/python/test_release_mixin.py
@@ -0,0 +1,103 @@
+import pytest as pt
+from pathlib import Path
+from pybuilder.core import Project
+
+from src.main.python.ddadevops.release_mixin import ReleaseMixin
+from src.main.python.ddadevops.infrastructure.release_mixin import (
+    GitApi,
+    EnvironmentApi,
+)
+from src.main.python.ddadevops.domain import Devops, ReleaseContext, Release
+
+from .resource_helper import ResourceHelper
+from .domain.test_helper import devops_config
+
+MAIN_BRANCH = "main"
+STAGE = "test"
+PROJECT_ROOT_PATH = "."
+MODULE = "test"
+BUILD_DIR_NAME = "build_dir"
+
+# def change_test_dir( tmp_path: Path, monkeypatch: pt.MonkeyPatch):
+#     monkeypatch.chdir(tmp_path)
+
+# class MyBuild(ReleaseMixin):
+#     pass
+
+
+def test_release_mixin(tmp_path):
+    tmp_path_str = str(tmp_path)
+
+    project = Project(tmp_path_str, name="name")
+    sut = ReleaseMixin(
+        project,
+        devops_config(
+            {
+                "project_root_path": tmp_path_str,
+                "build_types": [],
+                "mixin_types": ["RELEASE"],
+            }
+        ),
+    )
+    sut.initialize_build_dir()
+    assert os.path.exists(f"{devops_build.build_path()}")
+
+
+# def initialize_with_object(project, CONFIG_FILE):
+#     project.build_depends_on('ddadevops>=3.1.2')
+#     devops = Devops(STAGE, PROJECT_ROOT_PATH, MODULE, "release_test", BUILD_DIR_NAME)
+#     release = Release(devops, MAIN_BRANCH, CONFIG_FILE)
+#     build = MyBuild(project, release)
+#     return build
+
+# def test_release_mixin_git(tmp_path: Path, monkeypatch: pt.MonkeyPatch):
+
+#     # init
+#     th = Helper()
+#     th.copy_files(th.TEST_FILE_PATH, tmp_path)
+#     th.TEST_FILE_PATH = tmp_path / th.TEST_FILE_NAME
+
+#     change_test_dir(tmp_path, monkeypatch)
+#     project = Project(tmp_path)
+
+#     git_api = GitApi()
+#     git_api.init()
+#     git_api.set_user_config("ex.ample@mail.com", "Ex Ample")
+#     git_api.add_file(th.TEST_FILE_NAME)
+#     git_api.commit("MAJOR release")
+
+#     build = initialize_with_object(project, th.TEST_FILE_PATH)
+#     build.prepare_release()
+#     release_version = build.release_repo.version_repository.get_version()
+
+#     # test
+#     assert "124.0.1-SNAPSHOT" in release_version.get_version_string()
+
+# def test_release_mixin_environment(tmp_path: Path, monkeypatch: pt.MonkeyPatch):
+
+#     # init
+#     th = Helper()
+#     th.copy_files(th.TEST_FILE_PATH, tmp_path)
+#     th.TEST_FILE_PATH = tmp_path / th.TEST_FILE_NAME
+
+#     change_test_dir(tmp_path, monkeypatch)
+#     project = Project(tmp_path)
+
+#     git_api = GitApi()
+#     git_api.init()
+#     git_api.set_user_config("ex.ample@mail.com", "Ex Ample")
+#     git_api.add_file(th.TEST_FILE_NAME)
+#     git_api.commit("Commit Message")
+
+#     environment_api = EnvironmentApi()
+#     environment_api.set("DDADEVOPS_RELEASE_TYPE", "MAJOR")
+
+#     build = initialize_with_object(project, th.TEST_FILE_PATH)
+#     build.prepare_release()
+#     release_version = build.release_repo.version_repository.get_version()
+
+#     # test
+#     assert "124.0.1-SNAPSHOT" in release_version.get_version_string()
+
+#     # tear down
+#     environment_api.set("DDADEVOPS_RELEASE_TYPE", "")