diff --git a/tests/test_main.py b/tests/test_main.py
index 3a7a330c..a84c6f54 100644
--- a/tests/test_main.py
+++ b/tests/test_main.py
@@ -193,7 +193,7 @@ def test_match_across_scopes_file_function(z9324d_extractor):
                     rule:
                         meta:
                             name: install service
-                            scopes: 
+                            scopes:
                                 static: function
                                 dynamic: dev
                             examples:
@@ -232,7 +232,7 @@ def test_match_across_scopes_file_function(z9324d_extractor):
                     rule:
                         meta:
                             name: .text section and install service
-                            scopes: 
+                            scopes:
                                 static: file
                                 dynamic: dev
                             examples:
@@ -329,7 +329,7 @@ def test_subscope_bb_rules(z9324d_extractor):
                     rule:
                         meta:
                             name: test rule
-                            scopes: 
+                            scopes:
                                 static: function
                                 dynamic: dev
                         features:
@@ -436,7 +436,7 @@ def test_instruction_subscope(z9324d_extractor):
                       meta:
                         name: push 1000 on i386
                         namespace: test
-                        scopes: 
+                        scopes:
                             static: function
                             dynamic: dev
                       features:
diff --git a/tests/test_rule_cache.py b/tests/test_rule_cache.py
index d0e736ca..82187106 100644
--- a/tests/test_rule_cache.py
+++ b/tests/test_rule_cache.py
@@ -20,7 +20,7 @@ R1 = capa.rules.Rule.from_yaml(
             name: test rule
             authors:
                 - user@domain.com
-            scopes: 
+            scopes:
                 static: function
                 dynamic: dev
             examples:
@@ -42,7 +42,7 @@ R2 = capa.rules.Rule.from_yaml(
             name: test rule 2
             authors:
                 - user@domain.com
-            scopes: 
+            scopes:
                 static: function
                 dynamic: dev
             examples:
diff --git a/tests/test_rules.py b/tests/test_rules.py
index 7cf81ac0..038dec35 100644
--- a/tests/test_rules.py
+++ b/tests/test_rules.py
@@ -247,7 +247,7 @@ def test_invalid_rule_feature():
                 rule:
                     meta:
                         name: test rule
-                        scopes: 
+                        scopes:
                             static: file
                             dynamic: dev
                     features:
@@ -347,7 +347,7 @@ def test_subscope_rules():
                     rule:
                         meta:
                             name: test function subscope
-                            scopes: 
+                            scopes:
                                 static: file
                                 dynamic: dev
                         features: