diff --git a/tests/unit/processor/labeler/test_labeler_rule.py b/tests/unit/processor/labeler/test_labeler_rule.py
index 1b461ac28..3b98058a9 100644
--- a/tests/unit/processor/labeler/test_labeler_rule.py
+++ b/tests/unit/processor/labeler/test_labeler_rule.py
@@ -217,7 +217,7 @@ def test_null_returns_true_for_matching_document(self):
 
     def test_lucene_regex_matches_returns_true_for_matching_document(self):
         rule_definition = {
-            "filter": 'applyrule: /.*yes.*/',
+            "filter": "applyrule: /.*yes.*/",
             "labeler": {"label": {"reporter": ["windows"]}},
         }
         rule = LabelerRule._create_from_dict(rule_definition)
@@ -227,7 +227,7 @@ def test_lucene_regex_matches_returns_true_for_matching_document(self):
 
     def test_lucene_regex_matches_returns_false_for_non_matching_document(self):
         rule_definition = {
-            "filter": 'applyrule: /.*yes.*/',
+            "filter": "applyrule: /.*yes.*/",
             "labeler": {"label": {"reporter": ["windows"]}},
         }
         rule = LabelerRule._create_from_dict(rule_definition)
@@ -244,7 +244,7 @@ def test_lucene_regex_matches_returns_false_for_non_matching_document(self):
 
     def test_complex_lucene_regex_matches_returns_true_for_matching_document(self):
         rule_definition = {
-            "filter": r'applyrule: /(?:(?=.*[a-z])(?:(?=.*[A-Z])(?=.*[\d\W])|(?=.*\W)(?=.*\d))|(?=.*\W)(?=.*[A-Z])(?=.*\d)).{8,}/',
+            "filter": r"applyrule: /(?:(?=.*[a-z])(?:(?=.*[A-Z])(?=.*[\d\W])|(?=.*\W)(?=.*\d))|(?=.*\W)(?=.*[A-Z])(?=.*\d)).{8,}/",
             # pylint: disable=line-too-long
             "labeler": {"label": {"reporter": ["windows"]}},
         }
@@ -256,7 +256,7 @@ def test_complex_lucene_regex_matches_returns_true_for_matching_document(self):
 
     def test_complex_lucene_regex_does_not_match_returns_true_for_matching_document(self):
         rule_definition = {
-            "filter": r'applyrule: /(?:(?=.*[a-z])(?:(?=.*[A-Z])(?=.*[\d\W])|(?=.*\W)(?=.*\d))|(?=.*\W)(?=.*[A-Z])(?=.*\d)).{8,}/',
+            "filter": r"applyrule: /(?:(?=.*[a-z])(?:(?=.*[A-Z])(?=.*[\d\W])|(?=.*\W)(?=.*\d))|(?=.*\W)(?=.*[A-Z])(?=.*\d)).{8,}/",
             # pylint: disable=line-too-long
             "labeler": {"label": {"reporter": ["windows"]}},
         }