diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 945f8c515..26e432def 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -23,7 +23,7 @@ repos:
   - id: black
 
 - repo: https://github.com/charliermarsh/ruff-pre-commit
-  rev: "v0.0.265"
+  rev: "v0.0.270"
   hooks:
     - id: ruff
       args: ["--fix", "--show-fixes"]
diff --git a/src/uproot/behaviors/TAxis.py b/src/uproot/behaviors/TAxis.py
index 64374356e..4b1015278 100644
--- a/src/uproot/behaviors/TAxis.py
+++ b/src/uproot/behaviors/TAxis.py
@@ -183,7 +183,7 @@ def labels(self, flow=False):
         if fLabels is not None and len(fLabels) == fNbins:
             out = [str(x) for x in fLabels]
             if flow:
-                return ["underflow", *out] + ["overflow"]
+                return ["underflow", *out, "overflow"]
             else:
                 return out
         else:
diff --git a/src/uproot/reading.py b/src/uproot/reading.py
index 11ce20944..7cbbb09f5 100644
--- a/src/uproot/reading.py
+++ b/src/uproot/reading.py
@@ -1484,7 +1484,7 @@ def object_path(self):
         See :ref:`uproot.reading.ReadOnlyDirectory.path` for the path as a
         tuple of strings.
         """
-        return "/".join(("", *self._path) + ("",)).replace("//", "/")
+        return "/".join(("", *self._path, "")).replace("//", "/")
 
     @property
     def file_path(self):
diff --git a/src/uproot/writing/_cascadetree.py b/src/uproot/writing/_cascadetree.py
index 5601429fc..e05dd45d5 100644
--- a/src/uproot/writing/_cascadetree.py
+++ b/src/uproot/writing/_cascadetree.py
@@ -983,8 +983,36 @@ def write_anew(self, sink):
             leaf_title_length = (1 if len(leaf_title) < 255 else 5) + len(leaf_title)
 
             leaf_header = numpy.array(
-                [64, 0, 0, 76, 0, 1, 64, 0, 0, 54, 0, 2, 64, 0]
-                + [0, 30, 0, 1, 0, 1, 0, 0, 0, 0, 3, 0, 0, 0],
+                [
+                    64,
+                    0,
+                    0,
+                    76,
+                    0,
+                    1,
+                    64,
+                    0,
+                    0,
+                    54,
+                    0,
+                    2,
+                    64,
+                    0,
+                    0,
+                    30,
+                    0,
+                    1,
+                    0,
+                    1,
+                    0,
+                    0,
+                    0,
+                    0,
+                    3,
+                    0,
+                    0,
+                    0,
+                ],
                 numpy.uint8,
             )
             tmp = leaf_header[0:4].view(">u4")
diff --git a/src/uproot/writing/writable.py b/src/uproot/writing/writable.py
index 3082f0f9f..dd8f6c2a2 100644
--- a/src/uproot/writing/writable.py
+++ b/src/uproot/writing/writable.py
@@ -534,7 +534,7 @@ def object_path(self):
         Path of directory names to this subdirectory as a single string, delimited
         by slashes.
         """
-        return "/".join(("", *self._path) + ("",)).replace("//", "/")
+        return "/".join(("", *self._path, "")).replace("//", "/")
 
     @property
     def file_path(self):
@@ -1651,7 +1651,7 @@ def object_path(self):
         Path of directory names to this TTree as a single string, delimited by
         slashes.
         """
-        return "/".join(("", *self._path) + ("",)).replace("//", "/")
+        return "/".join(("", *self._path, "")).replace("//", "/")
 
     @property
     def file_path(self):
@@ -1994,7 +1994,7 @@ def object_path(self):
         Path of directory names to this RNTuple as a single string, delimited by
         slashes.
         """
-        return "/".join(("", *self._path) + ("",)).replace("//", "/")
+        return "/".join(("", *self._path, "")).replace("//", "/")
 
     @property
     def file_path(self):