Add default config if not there (#43321)

Co-authored-by: Bram Kragten <mail@bramkragten.nl>

tests/components/blueprint/conftest.py

@@ -0,0 +1,14 @@
+"""Blueprints conftest."""
+
+import pytest
+
+from tests.async_mock import patch
+
+
+@pytest.fixture(autouse=True)
+def stub_blueprint_populate():
+    """Stub copying the blueprint automations to the config folder."""
+    with patch(
+        "homeassistant.components.blueprint.models.DomainBlueprints.async_populate"
+    ):
+        yield