diff --git a/poetry_version_plugin/plugin.py b/poetry_version_plugin/plugin.py
index 5dfdb0e..cd88fce 100644
--- a/poetry_version_plugin/plugin.py
+++ b/poetry_version_plugin/plugin.py
@@ -61,7 +61,10 @@ def activate(self, poetry: Poetry, io: IO) -> None:
                                     version = value_node.value
                                 elif isinstance(value_node, ast.Str):
                                     version = value_node.s
-                                else:
+                                else:  # pragma: nocover
+                                    # This is actually covered by tests, but can't be
+                                    # reported by Coverage
+                                    # Ref: https://github.com/nedbat/coveragepy/issues/198
                                     continue
                                 io.write_line(
                                     "Setting package dynamic version to __version__ "