diff --git a/tools/run-mypy b/tools/run-mypy
index 9f04446c..7e002ed5 100755
--- a/tools/run-mypy
+++ b/tools/run-mypy
@@ -123,7 +123,7 @@ files_dict = lister.list_files(
     ftypes=["py", "pyi"],
     use_shebang=True,
     modified_only=args.modified,
-    exclude=exclude + ["stubs"],
+    exclude=[*exclude, "stubs"],
     group_by_ftype=True,
 )
 
@@ -154,7 +154,7 @@ status = 0
 for repo, python_files in repo_python_files.items():
     print(f"Running mypy for `{repo}`.", flush=True)
     if python_files:
-        result = subprocess.call([mypy_command, "--"] + python_files)
+        result = subprocess.call([mypy_command, "--", *python_files])
         if result != 0:
             status = result
     else:
diff --git a/zulip/integrations/bridge_with_matrix/test_matrix.py b/zulip/integrations/bridge_with_matrix/test_matrix.py
index 087d07b3..1689e72a 100644
--- a/zulip/integrations/bridge_with_matrix/test_matrix.py
+++ b/zulip/integrations/bridge_with_matrix/test_matrix.py
@@ -66,7 +66,7 @@ def new_temp_dir() -> Iterator[str]:
 class MatrixBridgeScriptTests(TestCase):
     def output_from_script(self, options: List[str]) -> List[str]:
         popen = Popen(
-            [sys.executable, script] + options, stdin=PIPE, stdout=PIPE, universal_newlines=True
+            [sys.executable, script, *options], stdin=PIPE, stdout=PIPE, universal_newlines=True
         )
         return popen.communicate()[0].strip().split("\n")
 
diff --git a/zulip/integrations/zephyr/zephyr_mirror_backend.py b/zulip/integrations/zephyr/zephyr_mirror_backend.py
index a4ab9773..650dffaf 100755
--- a/zulip/integrations/zephyr/zephyr_mirror_backend.py
+++ b/zulip/integrations/zephyr/zephyr_mirror_backend.py
@@ -719,7 +719,7 @@ def send_authed_zephyr(zwrite_args: List[str], content: str) -> Tuple[int, str]:
 
 
 def send_unauthed_zephyr(zwrite_args: List[str], content: str) -> Tuple[int, str]:
-    return send_zephyr(zwrite_args + ["-d"], content)
+    return send_zephyr([*zwrite_args, "-d"], content)
 
 
 def zcrypt_encrypt_content(zephyr_class: str, instance: str, content: str) -> Optional[str]:
diff --git a/zulip_bots/zulip_bots/bots/converter/converter.py b/zulip_bots/zulip_bots/bots/converter/converter.py
index 62577667..de415076 100644
--- a/zulip_bots/zulip_bots/bots/converter/converter.py
+++ b/zulip_bots/zulip_bots/bots/converter/converter.py
@@ -57,8 +57,7 @@ def get_bot_converter_response(message: Dict[str, str], bot_handler: BotHandler)
     content = message["content"]
 
     words = content.lower().split()
-    convert_indexes = [i for i, word in enumerate(words) if word == "@convert"]
-    convert_indexes = [-1] + convert_indexes
+    convert_indexes = [-1, *(i for i, word in enumerate(words) if word == "@convert")]
     results = []
 
     for convert_index in convert_indexes: