fork initial value test to prevent builder errors

Author: James Souter

pyproject.toml

@@ -50,6 +50,7 @@ dev = [
     "pytest-cov",
     "pytest-mock",
     "pytest-asyncio",
+    "pytest-forked",
     "pytest-markdown-docs",
     "ruff",
     "sphinx-autobuild",

tests/transport/epics/ca/test_initial_value.py

@@ -46,6 +46,7 @@ class InitialValuesController(Controller):
     waveform_w = AttrW(Waveform(np.int64, shape=(10,)))
 
 
+@pytest.mark.forked
 @pytest.mark.asyncio
 async def test_initial_values_set_in_ca():
     pv_prefix = "SOFTIOC_INITIAL_DEVICE"