diff --git a/fastapi/routing.py b/fastapi/routing.py
index ea82ab14a..36774e0c5 100644
--- a/fastapi/routing.py
+++ b/fastapi/routing.py
@@ -436,9 +436,7 @@ def get_request_handler(
                 }
                 # If status_code was set, use it, otherwise use the default from the
                 # response class, in the case of redirect it's 307
-                current_status_code = (
-                    status_code if status_code else solved_result.response.status_code
-                )
+                current_status_code = status_code or solved_result.response.status_code
                 if current_status_code is not None:
                     response_args["status_code"] = current_status_code
                 if solved_result.response.status_code:
diff --git a/pyproject.toml b/pyproject.toml
index 1e6fda3b1..9823e5abf 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -502,6 +502,7 @@ select = [
     "B",  # flake8-bugbear
     "C4",  # flake8-comprehensions
     "UP",  # pyupgrade
+    "FURB"  # refurb
 ]
 ignore = [
     "E501",  # line too long, handled by black
diff --git a/scripts/doc_parsing_utils.py b/scripts/doc_parsing_utils.py
index 79f2e9ec0..fea95669b 100644
--- a/scripts/doc_parsing_utils.py
+++ b/scripts/doc_parsing_utils.py
@@ -1,5 +1,5 @@
 import re
-from typing import TypedDict, Union
+from typing import TypedDict
 
 CODE_INCLUDE_RE = re.compile(r"^\{\*\s*(\S+)\s*(.*)\*\}$")
 CODE_INCLUDE_PLACEHOLDER = "<CODE_INCLUDE>"
@@ -50,8 +50,8 @@ class MarkdownLinkInfo(TypedDict):
     line_no: int
     url: str
     text: str
-    title: Union[str, None]
-    attributes: Union[str, None]
+    title: str | None
+    attributes: str | None
     full_match: str
 
 
@@ -287,8 +287,8 @@ def _add_lang_code_to_url(url: str, lang_code: str) -> str:
 def _construct_markdown_link(
     url: str,
     text: str,
-    title: Union[str, None],
-    attributes: Union[str, None],
+    title: str | None,
+    attributes: str | None,
     lang_code: str,
 ) -> str:
     """
@@ -549,7 +549,7 @@ def extract_multiline_code_blocks(text: list[str]) -> list[MultilineCodeBlockInf
     return blocks
 
 
-def _split_hash_comment(line: str) -> tuple[str, Union[str, None]]:
+def _split_hash_comment(line: str) -> tuple[str, str | None]:
     match = HASH_COMMENT_RE.match(line)
     if match:
         code = match.group("code").rstrip()
@@ -558,7 +558,7 @@ def _split_hash_comment(line: str) -> tuple[str, Union[str, None]]:
     return line.rstrip(), None
 
 
-def _split_slashes_comment(line: str) -> tuple[str, Union[str, None]]:
+def _split_slashes_comment(line: str) -> tuple[str, str | None]:
     match = SLASHES_COMMENT_RE.match(line)
     if match:
         code = match.group("code").rstrip()
@@ -594,7 +594,7 @@ def replace_multiline_code_block(
         )
 
     block_language = block_a["lang"].lower()
-    if block_language in {"mermaid"}:
+    if block_language == "mermaid":
         if block_a != block_b:
             print(
                 f"Skipping mermaid code block replacement (lines {start_line}-{end_line_no}). "
@@ -604,8 +604,8 @@ def replace_multiline_code_block(
 
     code_block: list[str] = []
     for line_a, line_b in zip(block_a["content"], block_b["content"]):
-        line_a_comment: Union[str, None] = None
-        line_b_comment: Union[str, None] = None
+        line_a_comment: str | None = None
+        line_b_comment: str | None = None
 
         # Handle comments based on language
         if block_language in {