diff --git a/pyproject.toml b/pyproject.toml
index 05d908ccb..57e75195e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -70,6 +70,7 @@ dev = [
 
 [project.entry-points]
 'stpipe.steps' = { romancal = 'romancal.stpipe.integration:get_steps' }
+pytest11 = {webbpsf = 'pytest_plugin.webbpsf_plugin'}
 
 [project.scripts]
 okify_regtests = 'romancal.scripts.okify_regtests:main'
diff --git a/pytest_plugin/__init__.py b/pytest_plugin/__init__.py
new file mode 100644
index 000000000..e69de29bb
diff --git a/conftest.py b/pytest_plugin/webbpsf_plugin.py
similarity index 100%
rename from conftest.py
rename to pytest_plugin/webbpsf_plugin.py