diff --git a/tests/infrastructure/abri/test_abri_client.py b/tests/infrastructure/abri/test_abri_client.py
index d67624153..54146c825 100644
--- a/tests/infrastructure/abri/test_abri_client.py
+++ b/tests/infrastructure/abri/test_abri_client.py
@@ -147,3 +147,14 @@ def test_log_job_raises_transport_error_on_http_error_status(
     # Act / Assert
     with pytest.raises(AbriTransportError):
         client.log_job(_spec_example_request())
+
+
+def test_log_job_raises_transport_error_when_the_relay_is_unreachable(
+    client: AbriClient, mock_session: MagicMock
+) -> None:
+    # Arrange
+    mock_session.post.side_effect = requests.ConnectionError("connection refused")
+
+    # Act / Assert
+    with pytest.raises(AbriTransportError):
+        client.log_job(_spec_example_request())