diff --git a/python/lsst/ts/imsim/opdMetrology.py b/python/lsst/ts/imsim/opdMetrology.py
index d18ec78..bd90dd9 100644
--- a/python/lsst/ts/imsim/opdMetrology.py
+++ b/python/lsst/ts/imsim/opdMetrology.py
@@ -21,8 +21,6 @@
 
 __all__ = ["OpdMetrology"]
 
-import os
-
 import numpy as np
 import yaml
 from astropy.io import fits
diff --git a/python/lsst/ts/imsim/skySim.py b/python/lsst/ts/imsim/skySim.py
index d8c9204..8e745f8 100644
--- a/python/lsst/ts/imsim/skySim.py
+++ b/python/lsst/ts/imsim/skySim.py
@@ -30,6 +30,7 @@
 
 class SkySim:
     """Initialization of sky simulator class."""
+
     def __init__(self) -> None:
         # Star ID
         self.star_id = np.array([], dtype=int)