diff --git a/bilby/gw/detector/interferometer.py b/bilby/gw/detector/interferometer.py
index 43af4e73e87f2182c57cdf124b23a1801773eedb..fcfdd9a8571bb7814f0ad6147a3a14d367fa28b8 100644
--- a/bilby/gw/detector/interferometer.py
+++ b/bilby/gw/detector/interferometer.py
@@ -1238,4 +1238,4 @@ def load_data_from_cache_file(
     elif not data_set:
         raise ValueError('Data not loaded for {}'.format(ifo.name))
     elif not psd_set:
-        raise ValueError('PSD not created for {}'.format(ifo.name))
\ No newline at end of file
+        raise ValueError('PSD not created for {}'.format(ifo.name))
diff --git a/bilby/gw/detector/networks.py b/bilby/gw/detector/networks.py
index 8eac32390d0a536b79a564dd2da3562923107453..d9ea1e22a9ed962fd611ca2300a017b88ca7233e 100644
--- a/bilby/gw/detector/networks.py
+++ b/bilby/gw/detector/networks.py
@@ -7,7 +7,7 @@ from bilby.core import utils
 from bilby.core.utils import logger
 from bilby.gw import utils
 from bilby.gw.detector import get_interferometer_with_open_data
-from .interferometer import Interferometer
+from .interferometer import Interferometer, get_empty_interferometer
 from .psd import PowerSpectralDensity
 
 
@@ -307,7 +307,7 @@ def get_event_data(
     ------
     list: A list of bilby.gw.detector.Interferometer objects
     """
-    event_time = gwutils.get_event_time(event)
+    event_time = utils.get_event_time(event)
 
     interferometers = []
 
@@ -325,4 +325,4 @@ def get_event_data(
             logger.debug("Error raised {}".format(e))
             logger.warning('No data found for {}.'.format(name))
 
-    return InterferometerList(interferometers)
\ No newline at end of file
+    return InterferometerList(interferometers)