diff --git a/tests/conftest.py b/tests/conftest.py
index eb96e4c9c..462094922 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -28,6 +28,10 @@
 
 logger = logging.getLogger(__name__)
 
+# Opt out of telemetry before test modules are imported. `airbyte.mcp.server` builds its
+# Segment sink at import time, which is earlier than the per-test `do_not_track` fixture runs.
+os.environ["DO_NOT_TRACK"] = "true"
+
 
 PYTEST_POSTGRES_IMAGE = "postgres:13"
 PYTEST_POSTGRES_CONTAINER = "postgres_pytest_container"