diff --git a/cd/__init__.py b/cd/__init__.py
index 75b010d..fb08438 100644
--- a/cd/__init__.py
+++ b/cd/__init__.py
@@ -11,7 +11,7 @@ from cd.projects import Projects
 
 COMMANDS_PREFIX = "cd-"
 
-projects = Projects(os.environ)
+projects = Projects()
 project = Project(projects)
 
 
diff --git a/cd/project.py b/cd/project.py
index bdb2426..c4e79d4 100644
--- a/cd/project.py
+++ b/cd/project.py
@@ -1,3 +1,4 @@
+"""CI project."""
 from __future__ import annotations
 
 from pathlib import Path
diff --git a/cd/projects.py b/cd/projects.py
index a1ca31f..fa031f6 100644
--- a/cd/projects.py
+++ b/cd/projects.py
@@ -1,5 +1,7 @@
+"""CI projects."""
 from __future__ import annotations
 
+import os
 from pathlib import Path
 
 GROUP_AND_NAME = [
@@ -13,8 +15,8 @@ SERVER_URL = [
 
 
 class Projects:
-    def __init__(self: Projects, environment) -> None:
-        self.environment = environment
+    def __init__(self: Projects) -> None:
+        self.environment = os.environ
         # group, name
         for variable in GROUP_AND_NAME:
             if value := self.environment.get(variable, None):
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..d7119c5
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,2 @@
+[tool.ruff]
+select = ["ALL"]