diff --git a/tests/test_validation_error_str.py b/tests/test_validation_error_str.py
index 26f5d6447..df192ad5f 100644
--- a/tests/test_validation_error_str.py
+++ b/tests/test_validation_error_str.py
@@ -9,7 +9,13 @@ from fastapi.exceptions import (
 
 def test_request_validation_error_str_single_error():
     """Test string representation of RequestValidationError with single error."""
-    errors = [{"type": "int_parsing", "loc": ["query", "id"], "msg": "Input should be a valid integer"}]
+    errors = [
+        {
+            "type": "int_parsing",
+            "loc": ["query", "id"],
+            "msg": "Input should be a valid integer",
+        }
+    ]
     exc = RequestValidationError(errors)
     result = str(exc)
 
@@ -20,7 +26,11 @@ def test_request_validation_error_str_single_error():
 def test_request_validation_error_str_multiple_errors():
     """Test string representation of RequestValidationError with multiple errors."""
     errors = [
-        {"type": "int_parsing", "loc": ["query", "id"], "msg": "Input should be a valid integer"},
+        {
+            "type": "int_parsing",
+            "loc": ["query", "id"],
+            "msg": "Input should be a valid integer",
+        },
         {"type": "missing", "loc": ["query", "name"], "msg": "Field required"},
     ]
     exc = RequestValidationError(errors)
@@ -33,7 +43,13 @@ def test_request_validation_error_str_multiple_errors():
 
 def test_websocket_request_validation_error_str_single_error():
     """Test string representation of WebSocketRequestValidationError with single error."""
-    errors = [{"type": "int_parsing", "loc": ["query", "id"], "msg": "Input should be a valid integer"}]
+    errors = [
+        {
+            "type": "int_parsing",
+            "loc": ["query", "id"],
+            "msg": "Input should be a valid integer",
+        }
+    ]
     exc = WebSocketRequestValidationError(errors)
     result = str(exc)
 
@@ -44,7 +60,11 @@ def test_websocket_request_validation_error_str_single_error():
 def test_websocket_request_validation_error_str_multiple_errors():
     """Test string representation of WebSocketRequestValidationError with multiple errors."""
     errors = [
-        {"type": "int_parsing", "loc": ["query", "id"], "msg": "Input should be a valid integer"},
+        {
+            "type": "int_parsing",
+            "loc": ["query", "id"],
+            "msg": "Input should be a valid integer",
+        },
         {"type": "missing", "loc": ["query", "name"], "msg": "Field required"},
     ]
     exc = WebSocketRequestValidationError(errors)
@@ -57,7 +77,13 @@ def test_websocket_request_validation_error_str_multiple_errors():
 
 def test_response_validation_error_str_consistency():
     """Test that ResponseValidationError has similar __str__ behavior."""
-    errors = [{"type": "int_parsing", "loc": ["response", "id"], "msg": "Input should be a valid integer"}]
+    errors = [
+        {
+            "type": "int_parsing",
+            "loc": ["response", "id"],
+            "msg": "Input should be a valid integer",
+        }
+    ]
     exc = ResponseValidationError(errors)
     result = str(exc)