diff --git a/capa/engine.py b/capa/engine.py
index b5fbb412..dde1e7c8 100644
--- a/capa/engine.py
+++ b/capa/engine.py
@@ -8,7 +8,7 @@
 
 import copy
 import collections
-from typing import TYPE_CHECKING, Set, Dict, List, Tuple, Mapping, Iterable, Iterator, Union, cast
+from typing import TYPE_CHECKING, Set, Dict, List, Tuple, Union, Mapping, Iterable, Iterator, cast
 
 import capa.perf
 import capa.features.common
diff --git a/capa/features/extractors/dnfile_.py b/capa/features/extractors/dnfile_.py
index cf82bbce..03859db7 100644
--- a/capa/features/extractors/dnfile_.py
+++ b/capa/features/extractors/dnfile_.py
@@ -109,7 +109,7 @@ class DnfileFeatureExtractor(FeatureExtractor):
         assert self.pe is not None
         assert self.pe.net is not None
         assert self.pe.net.struct is not None
- 
+
         return self.pe.net.struct.MajorRuntimeVersion, self.pe.net.struct.MinorRuntimeVersion
 
     def get_meta_version_string(self) -> str:
diff --git a/capa/features/extractors/null.py b/capa/features/extractors/null.py
index f8d6d077..892eadc8 100644
--- a/capa/features/extractors/null.py
+++ b/capa/features/extractors/null.py
@@ -68,10 +68,5 @@ class NullFeatureExtractor(FeatureExtractor):
             yield InsnHandle(address, None)
 
     def extract_insn_features(self, f, bb, insn):
-        for address, feature in (
-            self.functions[f.address]
-            .basic_blocks[bb.address]
-            .instructions[insn.address]
-            .features
-        ):
+        for address, feature in self.functions[f.address].basic_blocks[bb.address].instructions[insn.address].features:
             yield feature, address
diff --git a/capa/ida/plugin/form.py b/capa/ida/plugin/form.py
index e6deecb7..eb205ae6 100644
--- a/capa/ida/plugin/form.py
+++ b/capa/ida/plugin/form.py
@@ -11,7 +11,7 @@ import copy
 import logging
 import itertools
 import collections
-from typing import Set, Dict, Optional, List, Any
+from typing import Any, Set, Dict, List, Optional
 
 import idaapi
 import ida_kernwin
@@ -1108,7 +1108,7 @@ class CapaExplorerForm(idaapi.PluginForm):
             _, file_matches = capa.engine.match(
                 capa.rules.RuleSet(list(capa.rules.get_rules_and_dependencies(rules, rule.name))).file_rules,
                 file_features,
-                NO_ADDRESS
+                NO_ADDRESS,
             )
         except Exception as e:
             self.set_rulegen_status("Failed to match rule (%s)" % e)
diff --git a/capa/ida/plugin/view.py b/capa/ida/plugin/view.py
index 75abf59c..0f577c7d 100644
--- a/capa/ida/plugin/view.py
+++ b/capa/ida/plugin/view.py
@@ -18,7 +18,7 @@ import capa.ida.helpers
 import capa.features.common
 import capa.features.basicblock
 from capa.ida.plugin.item import CapaExplorerFunctionItem
-from capa.features.address import _NoAddress, AbsoluteVirtualAddress
+from capa.features.address import AbsoluteVirtualAddress, _NoAddress
 from capa.ida.plugin.model import CapaExplorerDataModel
 
 MAX_SECTION_SIZE = 750
diff --git a/tests/test_engine.py b/tests/test_engine.py
index 8fee9b92..89c3b739 100644
--- a/tests/test_engine.py
+++ b/tests/test_engine.py
@@ -5,16 +5,17 @@
 # Unless required by applicable law or agreed to in writing, software distributed under the License
 #  is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and limitations under the License.
+import capa.features.address
 from capa.engine import *
 from capa.features import *
 from capa.features.insn import *
-import capa.features.address
 
 ADDR1 = capa.features.address.AbsoluteVirtualAddress(0x401001)
 ADDR2 = capa.features.address.AbsoluteVirtualAddress(0x401002)
 ADDR3 = capa.features.address.AbsoluteVirtualAddress(0x401003)
 ADDR4 = capa.features.address.AbsoluteVirtualAddress(0x401004)
 
+
 def test_number():
     assert Number(1).evaluate({Number(0): {ADDR1}}) == False
     assert Number(1).evaluate({Number(1): {ADDR1}}) == True
@@ -50,7 +51,12 @@ def test_some():
 
     assert Some(2, [Number(1), Number(2), Number(3)]).evaluate({Number(0): {ADDR1}}) == False
     assert Some(2, [Number(1), Number(2), Number(3)]).evaluate({Number(0): {ADDR1}, Number(1): {ADDR1}}) == False
-    assert Some(2, [Number(1), Number(2), Number(3)]).evaluate({Number(0): {ADDR1}, Number(1): {ADDR1}, Number(2): {ADDR1}}) == True
+    assert (
+        Some(2, [Number(1), Number(2), Number(3)]).evaluate(
+            {Number(0): {ADDR1}, Number(1): {ADDR1}, Number(2): {ADDR1}}
+        )
+        == True
+    )
     assert (
         Some(2, [Number(1), Number(2), Number(3)]).evaluate(
             {Number(0): {ADDR1}, Number(1): {ADDR1}, Number(2): {ADDR1}, Number(3): {ADDR1}}
diff --git a/tests/test_rules.py b/tests/test_rules.py
index d5aea406..43d7002d 100644
--- a/tests/test_rules.py
+++ b/tests/test_rules.py
@@ -13,10 +13,10 @@ import pytest
 import capa.rules
 import capa.engine
 import capa.features.common
-from capa.features.address import AbsoluteVirtualAddress
+import capa.features.address
+from capa.engine import Or
 from capa.features.file import FunctionName
 from capa.features.insn import Number, Offset, Property
-from capa.engine import Or
 from capa.features.common import (
     OS,
     OS_LINUX,
@@ -31,8 +31,7 @@ from capa.features.common import (
     Substring,
     FeatureAccess,
 )
-import capa.features.address
-
+from capa.features.address import AbsoluteVirtualAddress
 
 ADDR1 = capa.features.address.AbsoluteVirtualAddress(0x401001)
 ADDR2 = capa.features.address.AbsoluteVirtualAddress(0x401002)