diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 8d45958..f9677ed 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -8,7 +8,7 @@ repos:
       - id: isort
 
   - repo: https://github.com/psf/black
-    rev: 24.1.1
+    rev: 24.2.0
     hooks:
       - id: black
         args:
diff --git a/bugbear.py b/bugbear.py
index 6a3c2be..05693b5 100644
--- a/bugbear.py
+++ b/bugbear.py
@@ -1495,15 +1495,17 @@ def myunparse(node: ast.AST) -> str:  # pragma: no cover
                     format_specifier = re.sub(r"\.\d*", "", format_specifier)
 
                     # skip if any invalid characters in format spec
-                    invalid_characters = "".join((
-                        "=",  # align character only valid for numerics
-                        "+- ",  # sign
-                        "0123456789",  # width digits
-                        "z",  # coerce negative zero floating point to positive
-                        "#",  # alternate form
-                        "_,",  # thousands grouping
-                        "bcdeEfFgGnoxX%",  # various number specifiers
-                    ))
+                    invalid_characters = "".join(
+                        (
+                            "=",  # align character only valid for numerics
+                            "+- ",  # sign
+                            "0123456789",  # width digits
+                            "z",  # coerce negative zero floating point to positive
+                            "#",  # alternate form
+                            "_,",  # thousands grouping
+                            "bcdeEfFgGnoxX%",  # various number specifiers
+                        )
+                    )
                     if set(format_specifier).intersection(invalid_characters):
                         current_mark = variable = None
                         continue