diff --git a/capa/rules.py b/capa/rules.py
index 67256343..11feeaf8 100644
--- a/capa/rules.py
+++ b/capa/rules.py
@@ -101,7 +101,7 @@ SUPPORTED_FEATURES: Dict[str, Set] = {
         capa.features.common.Characteristic("embedded pe"),
         capa.features.common.String,
         capa.features.common.Format,
-   },
+    },
     FUNCTION_SCOPE: {
         capa.features.common.MatchedRule,
         capa.features.basicblock.BasicBlock,
diff --git a/tests/test_main.py b/tests/test_main.py
index 69782fc3..a4ab0551 100644
--- a/tests/test_main.py
+++ b/tests/test_main.py
@@ -327,7 +327,7 @@ def test_count_bb(z9324d_extractor):
 
 
 def test_instruction_scope(z9324d_extractor):
-    # .text:004071A4 68 E8 03 00 00          push    3E8h  
+    # .text:004071A4 68 E8 03 00 00          push    3E8h
     rules = capa.rules.RuleSet(
         [
             capa.rules.Rule.from_yaml(
@@ -355,7 +355,7 @@ def test_instruction_scope(z9324d_extractor):
 def test_instruction_subscope(z9324d_extractor):
     # .text:00406F60                         sub_406F60 proc near
     # [...]
-    # .text:004071A4 68 E8 03 00 00          push    3E8h  
+    # .text:004071A4 68 E8 03 00 00          push    3E8h
     rules = capa.rules.RuleSet(
         [
             capa.rules.Rule.from_yaml(