diff --git a/monetio/models/hysplit.py b/monetio/models/hysplit.py
index 3f77a537..663f361a 100644
--- a/monetio/models/hysplit.py
+++ b/monetio/models/hysplit.py
@@ -1150,7 +1150,7 @@ def get_thickness(cdump):
     elif cstr in cdump.attrs.keys():
         alts = cdump.z.values
         zvals = cdump.attrs[cstr]
-        cra = []
+        # cra = []
         for aaa in alts:
             # if a level is not found in the attribute array then use the calculate method.
             if aaa not in zvals:
diff --git a/tests/test_hysplit.py b/tests/test_hysplit.py
index 21b13bb8..0b5815dd 100644
--- a/tests/test_hysplit.py
+++ b/tests/test_hysplit.py
@@ -1,8 +1,4 @@
-import datetime
-import os
-
 import numpy as np
-import pytest
 
 from monetio import hysplit
 
@@ -34,9 +30,9 @@ def test_003():
     xanswers = [165.0, 167.0, -149.0]
     yyy = [1, 17, 93]
     yanswers = [0.0, 8.0, 46.0]
-    grid = hysplit.get_latlongrid(attrs, xxx, yyy)
+    grid = hysplit.get_latlongrid(attrs, xxx, yyy)  # noqa: F841
     latlist, lonlist = hysplit.getlatlon(attrs)
-    gridanswer = np.meshgrid(xanswers, yanswers)
+    gridanswer = np.meshgrid(xanswers, yanswers)  # noqa: F841
 
     assert len(latlist) == 361
     assert len(lonlist) == 721
diff --git a/tests/test_hytraj.py b/tests/test_hytraj.py
index e2688723..776dc8ee 100644
--- a/tests/test_hytraj.py
+++ b/tests/test_hytraj.py
@@ -1,8 +1,4 @@
-import datetime
-import os
-
 import numpy as np
-import pytest
 
 from monetio import hytraj