diff --git a/pyproject.toml b/pyproject.toml
index 05f2c1b..1b95058 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -54,9 +54,6 @@ packages = ["aprsd_twitter_plugin"]
 [project.entry-points."oslo.config.opts"]
     "aprsd_twitter_plugin.conf" = "aprsd_twitter_plugin.conf.opts:list_opts"  # type: ignore
 
-[project.entry-points."oslo.config.opts.defaults"]
-    "aprsd_twitter_plugin.conf" = "aprsd_twitter_plugin.conf.opts:defaults"  # type: ignore
-
 [project.scripts]
     "aprsd-twitter-plugin-export-config" = "aprsd_twitter_plugin.cli:main"
 
diff --git a/tests/test_oslo_config_entry_points.py b/tests/test_oslo_config_entry_points.py
new file mode 100644
index 0000000..c365dd6
--- /dev/null
+++ b/tests/test_oslo_config_entry_points.py
@@ -0,0 +1,31 @@
+"""Verify oslo.config entry points declared in pyproject.toml resolve.
+
+Regression test for the `aprsd sample-config` AttributeError caused by a
+`oslo.config.opts.defaults` entry point pointing at a nonexistent
+`defaults` function (see handover session-state-2026-09-24.json).
+"""
+
+import importlib
+import tomllib
+from pathlib import Path
+
+
+def _entry_points():
+    root = Path(__file__).resolve().parents[1]
+    pyproject = tomllib.loads((root / "pyproject.toml").read_text(encoding="utf-8"))
+    return pyproject["project"]["entry-points"]
+
+
+def test_oslo_config_entry_points_resolve():
+    """Every oslo.config entry point target must resolve to a real attribute."""
+    entry_points = _entry_points()
+    for group, targets in entry_points.items():
+        if not group.startswith("oslo.config.opts"):
+            continue
+        for target in targets.values():
+            module_name, _, attr = target.partition(":")
+            module = importlib.import_module(module_name)
+            assert hasattr(module, attr), (
+                f"{group} entry point '{target}' does not resolve: "
+                f"module '{module_name}' has no attribute '{attr}'"
+            )