diff --git a/capa/features/extractors/pefile.py b/capa/features/extractors/pefile.py
index 0d4a5243..b1727574 100644
--- a/capa/features/extractors/pefile.py
+++ b/capa/features/extractors/pefile.py
@@ -14,9 +14,8 @@ import capa.features.extractors
 import capa.features.extractors.helpers
 import capa.features.extractors.strings
 from capa.features.file import Export, Import, Section
-from capa.features.common import String, Characteristic
+from capa.features.common import CHARACTERISTIC_PE, CHARACTERISTIC_WINDOWS, String, Characteristic
 from capa.features.extractors.base_extractor import FeatureExtractor
-from capa.features.common import CHARACTERISTIC_WINDOWS, CHARACTERISTIC_PE
 
 logger = logging.getLogger(__name__)
 
diff --git a/capa/rules.py b/capa/rules.py
index e3264998..8e6267bf 100644
--- a/capa/rules.py
+++ b/capa/rules.py
@@ -34,10 +34,15 @@ import capa.features.insn
 import capa.features.common
 import capa.features.basicblock
 from capa.engine import Statement, FeatureSet
-from capa.features.common import MAX_BYTES_FEATURE_SIZE, Feature
-from capa.features.common import CHARACTERISTIC_WINDOWS, CHARACTERISTIC_LINUX, CHARACTERISTIC_MACOS
-from capa.features.common import CHARACTERISTIC_PE, CHARACTERISTIC_ELF
-
+from capa.features.common import (
+    CHARACTERISTIC_PE,
+    CHARACTERISTIC_ELF,
+    CHARACTERISTIC_LINUX,
+    CHARACTERISTIC_MACOS,
+    CHARACTERISTIC_WINDOWS,
+    MAX_BYTES_FEATURE_SIZE,
+    Feature,
+)
 
 logger = logging.getLogger(__name__)
 
diff --git a/tests/fixtures.py b/tests/fixtures.py
index 3e8f1b08..3bf065f0 100644
--- a/tests/fixtures.py
+++ b/tests/fixtures.py
@@ -21,8 +21,14 @@ import capa.features.file
 import capa.features.insn
 import capa.features.common
 import capa.features.basicblock
-from capa.features.common import ARCH_X32, ARCH_X64
-from capa.features.common import CHARACTERISTIC_WINDOWS, CHARACTERISTIC_LINUX, CHARACTERISTIC_PE, CHARACTERISTIC_ELF
+from capa.features.common import (
+    ARCH_X32,
+    ARCH_X64,
+    CHARACTERISTIC_PE,
+    CHARACTERISTIC_ELF,
+    CHARACTERISTIC_LINUX,
+    CHARACTERISTIC_WINDOWS,
+)
 
 CD = os.path.dirname(__file__)
 
diff --git a/tests/test_rules.py b/tests/test_rules.py
index 022292ca..95a39fb1 100644
--- a/tests/test_rules.py
+++ b/tests/test_rules.py
@@ -15,7 +15,16 @@ import capa.engine
 import capa.features.common
 from capa.features.file import FunctionName
 from capa.features.insn import Number, Offset
-from capa.features.common import ARCH_X32, ARCH_X64, CHARACTERISTIC_PE, CHARACTERISTIC_WINDOWS, OS_WINDOWS, FORMAT_PE, String, Characteristic
+from capa.features.common import (
+    ARCH_X32,
+    ARCH_X64,
+    FORMAT_PE,
+    OS_WINDOWS,
+    CHARACTERISTIC_PE,
+    CHARACTERISTIC_WINDOWS,
+    String,
+    Characteristic,
+)
 
 
 def test_rule_ctor():
@@ -979,4 +988,4 @@ def test_format_features():
     r = capa.rules.Rule.from_yaml(rule)
     children = list(r.statement.get_children())
     assert (CHARACTERISTIC_PE in children) == True
-    assert (CHARACTERISTIC_ELF not in children) == True
\ No newline at end of file
+    assert (CHARACTERISTIC_ELF not in children) == True