diff --git a/src/nsidc/metgen/aws.py b/src/nsidc/metgen/aws.py
index 20189b3..0955777 100644
--- a/src/nsidc/metgen/aws.py
+++ b/src/nsidc/metgen/aws.py
@@ -10,7 +10,7 @@ def kinesis_stream_exists(stream_name):
     """
     client = boto3.client("kinesis")
     try:
-        summary = client.describe_stream_summary(StreamName=stream_name)
+        client.describe_stream_summary(StreamName=stream_name)
         return True
     except Exception:
         return False
diff --git a/tests/test_aws.py b/tests/test_aws.py
index eae8a3d..5f5dae6 100644
--- a/tests/test_aws.py
+++ b/tests/test_aws.py
@@ -57,7 +57,7 @@ def s3(aws_credentials):
 def s3_bucket(s3):
     """Create an S3 buket and return the bucket name."""
     bucket_name = "duck-test-bucket"
-    response = s3.create_bucket(
+    s3.create_bucket(
             Bucket=bucket_name,
             CreateBucketConfiguration={
                 'LocationConstraint': 'us-west-2'
diff --git a/tests/test_cli.py b/tests/test_cli.py
index 7540de3..84f36ec 100644
--- a/tests/test_cli.py
+++ b/tests/test_cli.py
@@ -53,7 +53,7 @@ def test_process_requires_config(mock, cli_runner):
 @patch('nsidc.metgen.config.validate')
 @patch('nsidc.metgen.metgen.process')
 def test_process_with_config_calls_process(mock_validate, mock_process, cli_runner):
-    result = cli_runner.invoke(cli, ['process', '--config', './example/modscg.ini'])
+    cli_runner.invoke(cli, ['process', '--config', './example/modscg.ini'])
     assert mock_process.called
 
 @patch('nsidc.metgen.config.validate')
@@ -78,7 +78,7 @@ def test_process_with_no_write_cnm(mock_validate, process_mock, configuration_mo
     assert configuration_mock.called
     args = configuration_mock.call_args.args
     overrides = args[1]
-    assert overrides['write_cnm_file'] == None
+    assert overrides['write_cnm_file'] is None
     assert result.exit_code == 0
 
 @patch('nsidc.metgen.config.configuration')
@@ -90,7 +90,7 @@ def test_process_with_write_cnm(mock_validate, process_mock, configuration_mock,
     assert configuration_mock.called
     args = configuration_mock.call_args.args
     overrides = args[1]
-    assert overrides['write_cnm_file'] == True
+    assert overrides['write_cnm_file']
     assert result.exit_code == 0
 
 @patch('nsidc.metgen.config.configuration')
@@ -102,7 +102,7 @@ def test_process_with_no_overwrite(mock_validate, process_mock, configuration_mo
     assert configuration_mock.called
     args = configuration_mock.call_args.args
     overrides = args[1]
-    assert overrides['overwrite_ummg'] == None
+    assert overrides['overwrite_ummg'] is None
     assert result.exit_code == 0
 
 @patch('nsidc.metgen.config.configuration')
@@ -114,7 +114,7 @@ def test_process_with_overwrite(mock_validate, process_mock, configuration_mock,
     assert configuration_mock.called
     args = configuration_mock.call_args.args
     overrides = args[1]
-    assert overrides['overwrite_ummg'] == True
+    assert overrides['overwrite_ummg']
     assert result.exit_code == 0
 
 # TODO: When process raises an exception, cli handles it and displays a message
diff --git a/tests/test_config.py b/tests/test_config.py
index c70e7c7..96f4916 100644
--- a/tests/test_config.py
+++ b/tests/test_config.py
@@ -72,7 +72,7 @@ def test_config_parser_handles_empty_strings_for_booleans(mock):
     cp['foo'] = {
         'success': ''
     }
-    assert cp.getboolean('foo', 'success') == False
+    assert not cp.getboolean('foo', 'success')
 
 def test_config_from_config_parser(cfg_parser):
     cfg = config.configuration(cfg_parser, {}, constants.DEFAULT_CUMULUS_ENVIRONMENT)
@@ -101,7 +101,7 @@ def test_config_with_write_cnm(cfg_parser, expected_keys):
     assert cfg.auth_id == 'DATA-0001'
     assert cfg.kinesis_stream_name == 'xyzzy-uat-stream'
     assert cfg.environment == 'uat'
-    assert cfg.write_cnm_file == True
+    assert cfg.write_cnm_file
 
 def test_config_with_no_overwrite_ummg(cfg_parser, expected_keys):
     cfg = config.configuration(cfg_parser, {}, constants.DEFAULT_CUMULUS_ENVIRONMENT)
@@ -116,7 +116,7 @@ def test_config_with_overwrite_ummg(cfg_parser, expected_keys):
 
     config_keys = set(cfg.__dict__)
     assert len(config_keys - expected_keys) == 0
-    assert cfg.overwrite_ummg == True
+    assert cfg.overwrite_ummg
 
 def test_get_configuration_value(cfg_parser):
     environment = constants.DEFAULT_CUMULUS_ENVIRONMENT
@@ -154,7 +154,7 @@ def test_configuration_has_good_defaults(cfg_parser, section, option, expected):
 def test_validate_with_valid_checks(m1, m2, m3, cfg_parser):
     cfg = config.configuration(cfg_parser, {})
     valid = config.validate(cfg)
-    assert valid == True
+    assert valid
 
 @patch('nsidc.metgen.metgen.os.path.exists', return_value = False)
 @patch('nsidc.metgen.metgen.aws.kinesis_stream_exists', return_value = False)
diff --git a/tests/test_metgen.py b/tests/test_metgen.py
index cec65c2..c73f045 100644
--- a/tests/test_metgen.py
+++ b/tests/test_metgen.py
@@ -120,7 +120,7 @@ def test_end_ledger(mock_datetime):
     actual = metgen.end_ledger(ledger)
 
     assert actual.granule == granule
-    assert actual.successful == True
+    assert actual.successful
     assert actual.startDatetime == now
     assert actual.endDatetime == now
 
@@ -136,7 +136,7 @@ def test_end_ledger_with_unsuccessful_actions(mock_datetime):
     actual = metgen.end_ledger(ledger)
 
     assert actual.granule == granule
-    assert actual.successful == False
+    assert not actual.successful
     assert actual.startDatetime == now
     assert actual.endDatetime == now
 
@@ -159,4 +159,4 @@ def failing_op():
 
     assert new_ledger.granule == ledger.granule
     assert len(new_ledger.actions) == 1
-    assert new_ledger.actions[0].successful == False
+    assert not new_ledger.actions[0].successful