diff --git a/gamutrf/compress_dirs.py b/gamutrf/compress_dirs.py
index 8a8131ad..18adc015 100644
--- a/gamutrf/compress_dirs.py
+++ b/gamutrf/compress_dirs.py
@@ -1,11 +1,8 @@
 import argparse
-import logging
 import os
 import sys
 import time
 import tarfile
-import gzip
-import subprocess
 import sysrsync
 
 
@@ -25,8 +22,8 @@ def check_tld(top_dir, args):
         f"Folders inside '{top_dir}' that are more than {args.threshold_seconds} seconds old:"
     )
 
-    for dir in os.listdir(top_dir):
-        dir_path = os.path.join(top_dir, dir)
+    for sdir in os.listdir(top_dir):
+        dir_path = os.path.join(top_dir, sdir)
         if os.path.isdir(dir_path):
             folder_mtime = os.path.getmtime(dir_path)
             if current_time - folder_mtime > args.threshold_seconds:
@@ -54,7 +51,7 @@ def tar_directories(dir_paths, args):
 
         with tarfile.open(tar_filename, file_mode) as tar_file:
             # Add all files in the directory to the tar file
-            for root, dirs, files in os.walk(dir_path):
+            for root, _dirs, files in os.walk(dir_path):
                 for file in files:
                     file_path = os.path.join(root, file)
                     tar_file.add(file_path)
@@ -66,7 +63,7 @@ def tar_directories(dir_paths, args):
 
         # Delete if --delete
         if args.delete:
-            for root, dirs, files in os.walk(dir_path):
+            for root, _dirs, files in os.walk(dir_path):
                 for file in files:
                     file_path = os.path.join(root, file)
                     os.remove(file_path)
@@ -186,9 +183,9 @@ def main():
         for filename in tarred_filenames:
             print(filename)
         print("...finished processing files")
-        if args.export_path != None:
+        if args.export_path is not None:
             print(f"Exporting tar files to {args.export_path}")
-            exported_filepath = export_to_path(args.dir, args.export_path, args)
+            export_to_path(args.dir, args.export_path, args)
             print(f"...done exporting to {args.export_path}")
     else:
         print("No valid folders found.")
diff --git a/gamutrf/grsource.py b/gamutrf/grsource.py
index f1dd4eb2..8d59527b 100644
--- a/gamutrf/grsource.py
+++ b/gamutrf/grsource.py
@@ -1,6 +1,5 @@
 import logging
 import os
-import random
 import sys
 import time
 from urllib.parse import urlparse
diff --git a/gamutrf/offline.py b/gamutrf/offline.py
index 1197da28..f8f643c8 100644
--- a/gamutrf/offline.py
+++ b/gamutrf/offline.py
@@ -1,9 +1,7 @@
 #!/usr/bin/python3
-from argparse import ArgumentParser, BooleanOptionalAction
 import glob
 import os
 import logging
-import tempfile
 import time
 
 from gnuradio import iqtlabs
@@ -17,7 +15,6 @@ def main():
     parser = argument_parser()
     parser.add_argument("filename", type=str, help="Recording filename (or glob)")
     options = parser.parse_args()
-    filename = options.filename
     for filename in glob.glob(options.filename):
         out_dir = os.path.dirname(filename)
         if out_dir == "":
diff --git a/gamutrf/scan.py b/gamutrf/scan.py
index f6f1e367..2fbda7ab 100644
--- a/gamutrf/scan.py
+++ b/gamutrf/scan.py
@@ -1,5 +1,4 @@
 import logging
-import os
 import signal
 import time
 import sys
@@ -272,7 +271,7 @@ def argument_parser():
         dest="scaling",
         type=str,
         default="spectrum",
-        help="""Same as --scaling parameter in scipy.signal.spectrogram(). 
+        help="""Same as --scaling parameter in scipy.signal.spectrogram().
         Selects between computing the power spectral density ('density') 
         where `Sxx` has units of V**2/Hz and computing the power
         spectrum ('spectrum') where `Sxx` has units of V**2, if `x`
diff --git a/gamutrf/utils.py b/gamutrf/utils.py
index d80d3449..4a3613c7 100644
--- a/gamutrf/utils.py
+++ b/gamutrf/utils.py
@@ -5,7 +5,6 @@
 import sys
 from pathlib import Path
 
-import numpy as np
 import requests
 
 MTU = 8962
diff --git a/tests/test_birdseye_rssi.py b/tests/test_birdseye_rssi.py
index 5a47aa73..0f0531c7 100644
--- a/tests/test_birdseye_rssi.py
+++ b/tests/test_birdseye_rssi.py
@@ -2,6 +2,7 @@
 import glob
 import json
 import os
+import subprocess
 import tempfile
 import time
 import unittest
@@ -9,7 +10,6 @@
 import docker
 import numpy as np
 import requests
-import subprocess
 
 from gamutrf.birdseye_rssi import BirdsEyeRSSI
 
diff --git a/tests/test_sigwindows.py b/tests/test_sigwindows.py
index 0474cbe0..05d01a00 100644
--- a/tests/test_sigwindows.py
+++ b/tests/test_sigwindows.py
@@ -1,13 +1,11 @@
 #!/usr/bin/python3
 import os
-import tempfile
 import unittest
 
 from gamutrf.sigwindows import choose_record_signal
 from gamutrf.sigwindows import choose_recorders
 from gamutrf.sigwindows import freq_excluded
 from gamutrf.sigwindows import parse_freq_excluded
-from gamutrf.sigwindows import ROLLOVERHZ, ROLLING_FACTOR
 
 
 TESTDIR = os.path.join(os.path.dirname(os.path.realpath(__file__)), "data")