diff --git a/.gitignore b/.gitignore
index a9d6d13..64729a3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,6 +8,7 @@ htmlcov/
 .coverage
 tmp*/
 dist/
+.nox
 
 *.pyc
 *.bak
diff --git a/noxfile.py b/noxfile.py
new file mode 100644
index 0000000..6170fb9
--- /dev/null
+++ b/noxfile.py
@@ -0,0 +1,8 @@
+import nox
+
+@nox.session(
+    python=["3.12", "3.11", "3.10"]
+)
+def test(session):
+    session.install(".[dev]")
+    session.run("pytest")
diff --git a/setup.cfg b/setup.cfg
index 55da6f4..2519372 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -17,10 +17,6 @@ classifiers =
     Topic :: Software Development :: Libraries :: Application Frameworks
     License :: OSI Approved :: GNU Lesser General Public License v2 or later (LGPLv2+)
     Programming Language :: Python :: 3
-    Programming Language :: Python :: 3.6
-    Programming Language :: Python :: 3.7
-    Programming Language :: Python :: 3.8
-    Programming Language :: Python :: 3.9
     Programming Language :: Python :: 3.10
     Programming Language :: Python :: 3.11
     Programming Language :: Python :: 3.12
@@ -31,7 +27,7 @@ package_dir =
     = src
 packages = find_namespace:
 include_package_data = True
-python_requires = >=3.6, <4
+python_requires = >=3.10, <4
 install_requires =
     jsonschema
     colorama
diff --git a/src/objdictgen/gen_cfile.py b/src/objdictgen/gen_cfile.py
index 1f23e0f..dec13fe 100644
--- a/src/objdictgen/gen_cfile.py
+++ b/src/objdictgen/gen_cfile.py
@@ -22,7 +22,7 @@
 from collections import UserDict
 from dataclasses import dataclass
 from pathlib import Path
-from typing import Any, Self
+from typing import Any
 
 from objdictgen.maps import OD
 from objdictgen.typing import NodeProtocol, TODValue, TPath
@@ -71,7 +71,7 @@ def __init__(self, context: "CFileContext", text: str):
         self.text: str = text
         self.context: "CFileContext" = context
 
-    def __iadd__(self, other: "str|Text") -> Self:
+    def __iadd__(self, other: "str|Text") -> "Text":
         """Add a string to the text without formatting."""
         self.text += str(other)
         return self
@@ -80,7 +80,7 @@ def __add__(self, other: "str|Text") -> "Text":
         """Add a string to the text without formatting."""
         return Text(self.context, self.text + str(other))
 
-    def __imod__(self, other: str) -> Self:
+    def __imod__(self, other: str) -> "Text":
         """Add a string to the text with formatting."""
         self.text += other.format(**self.context)
         return self
diff --git a/src/objdictgen/node.py b/src/objdictgen/node.py
index 68d6453..a9a70c1 100644
--- a/src/objdictgen/node.py
+++ b/src/objdictgen/node.py
@@ -20,7 +20,7 @@
 
 import copy
 import logging
-from typing import Any, Generator, Iterable, Iterator, Self
+from typing import Any, Generator, Iterable, Iterator
 
 import colorama
 
@@ -236,7 +236,7 @@ def asdict(self) -> dict[str, Any]:
         """ Return the class data as a dict """
         return copy.deepcopy(self.__dict__)
 
-    def copy(self) -> Self:
+    def copy(self) -> "Node":
         """
         Return a copy of the node
         """
diff --git a/tests/test_imports.py b/tests/test_imports.py
new file mode 100644
index 0000000..d4a0623
--- /dev/null
+++ b/tests/test_imports.py
@@ -0,0 +1,45 @@
+
+def test_import_eds_utils():
+    import objdictgen.eds_utils
+
+def test_import_gen_cfile():
+    import objdictgen.gen_cfile
+
+def test_import_jsonod():
+    import objdictgen.jsonod
+
+def test_import_maps():
+    import objdictgen.maps
+
+def test_import_node():
+    import objdictgen.node
+
+def test_import_nodelist():
+    import objdictgen.nodelist
+
+def test_import_nodemanager():
+    import objdictgen.nodemanager
+
+def test_import_nosis():
+    import objdictgen.nosis
+
+def test_import_typing():
+    import objdictgen.typing
+
+def test_import_ui_commondialogs():
+    import objdictgen.ui.commondialogs
+
+def test_import_ui_exception():
+    import objdictgen.ui.exception
+
+def test_import_ui_networkedit():
+    import objdictgen.ui.networkedit
+
+def test_import_ui_networkeditortemplate():
+    import objdictgen.ui.networkeditortemplate
+
+def test_import_ui_objdictedit():
+    import objdictgen.ui.objdictedit
+
+def test_import_ui_subindextable():
+    import objdictgen.ui.subindextable