fix one inmport

tests/conftest.py

@@ -4,11 +4,13 @@
 # Based on https://docs.pytest.org/en/latest/example/simple.html#control-skipping-of-tests-according-to-command-line-option  # noqa: E501
 import pytest
 from bluesky.run_engine import RunEngine, TransitionError
-from observability_utils.tracing import JsonObjectSpanExporter, setup_tracing
+from observability_utils.tracing import setup_tracing
 from opentelemetry.sdk.trace import TracerProvider
 from opentelemetry.sdk.trace.export import SimpleSpanProcessor
 from opentelemetry.trace import get_tracer_provider
 
+from tests.unit_tests.utils.test_tracing import JsonObjectSpanExporter
+
 
 @pytest.fixture(scope="function")
 def RE(request):