diff --git a/sources/test/conftest.py b/sources/test/conftest.py
new file mode 100644
index 00000000..9b9ec2fb
--- /dev/null
+++ b/sources/test/conftest.py
@@ -0,0 +1,21 @@
+import os
+import pathlib
+from types import ModuleType
+
+import pytest
+
+from osbuild.testutil.imports import import_module_from_path
+
+
+@pytest.fixture
+def sources_module(request: pytest.FixtureRequest) -> ModuleType:
+    """sources_module is a fixture that imports a stage module by its name
+    defined in SOURCES_NAME in the test module.
+    """
+    if not hasattr(request.module, "SOURCES_NAME"):
+        raise ValueError("sources_module fixture must be used in a test module that defines SOURCES_NAME")
+
+    sources_name = request.module.SOURCES_NAME
+    caller_dir = pathlib.Path(request.node.fspath).parent
+    module_path = caller_dir.parent / sources_name
+    return import_module_from_path("sources", os.fspath(module_path))
diff --git a/tox.ini b/tox.ini
index 731d042f..a00e8aa0 100644
--- a/tox.ini
+++ b/tox.ini
@@ -25,7 +25,7 @@ deps =
     tox-backticks
 
 setenv =
-    LINTABLES = osbuild/ assemblers/* devices/* inputs/* mounts/* runners/* sources/* stages/*.* stages/test/*.py test/ `find ./tools ! -name "*.sh" -type f`
+    LINTABLES = osbuild/ assemblers/* devices/* inputs/* mounts/* runners/* sources/*.* stages/*.* stages/test/*.py sources/test/*.py test/ `find ./tools ! -name "*.sh" -type f`
     TYPEABLES = osbuild
     TYPEABLES_STRICT = ./osbuild/main_cli.py