diff --git a/pymongo/asynchronous/helpers.py b/pymongo/asynchronous/helpers.py
index 2b7420bbc..7ec1c18c5 100644
--- a/pymongo/asynchronous/helpers.py
+++ b/pymongo/asynchronous/helpers.py
@@ -313,9 +313,10 @@ def _handle_reauth(func: F) -> F:
     return cast(F, inner)
 
 
-async def anext(cls: Any) -> Any:
-    """Compatibility function until we drop 3.9 support: https://docs.python.org/3/library/functions.html#anext."""
-    if sys.version_info >= (3, 10):
-        return await builtins.anext(cls)
-    else:
+if sys.version_info >= (3, 10):
+    anext = builtins.anext
+else:
+
+    async def anext(cls: Any) -> Any:
+        """Compatibility function until we drop 3.9 support: https://docs.python.org/3/library/functions.html#anext."""
         return await cls.__anext__()
diff --git a/pymongo/asynchronous/mongo_client.py b/pymongo/asynchronous/mongo_client.py
index 75e151d95..c743c569d 100644
--- a/pymongo/asynchronous/mongo_client.py
+++ b/pymongo/asynchronous/mongo_client.py
@@ -112,7 +112,6 @@ from pymongo.server_type import SERVER_TYPE
 from pymongo.write_concern import DEFAULT_WRITE_CONCERN, WriteConcern
 
 if TYPE_CHECKING:
-    import sys
     from types import TracebackType
 
     from bson.objectid import ObjectId
@@ -126,11 +125,6 @@ if TYPE_CHECKING:
     from pymongo.asynchronous.server_selectors import Selection
     from pymongo.read_concern import ReadConcern
 
-    if sys.version_info[:2] >= (3, 9):
-        pass
-    else:
-        # Deprecated since version 3.9: collections.abc.Generator now supports [].
-        pass
 
 T = TypeVar("T")
 
diff --git a/pymongo/asynchronous/pool.py b/pymongo/asynchronous/pool.py
index 3cd7485a9..7c65af750 100644
--- a/pymongo/asynchronous/pool.py
+++ b/pymongo/asynchronous/pool.py
@@ -194,14 +194,9 @@ else:
 _METADATA: dict[str, Any] = {"driver": {"name": "PyMongo", "version": __version__}}
 
 if sys.platform.startswith("linux"):
-    # platform.linux_distribution was deprecated in Python 3.5
-    # and removed in Python 3.8. Starting in Python 3.5 it
-    # raises DeprecationWarning
-    # DeprecationWarning: dist() and linux_distribution() functions are deprecated in Python 3.5
-    _name = platform.system()
     _METADATA["os"] = {
-        "type": _name,
-        "name": _name,
+        "type": platform.system(),
+        "name": platform.system(),
         "architecture": platform.machine(),
         # Kernel version (e.g. 4.4.0-17-generic).
         "version": platform.release(),
diff --git a/pymongo/synchronous/helpers.py b/pymongo/synchronous/helpers.py
index 892d6a93e..3f0df2a3c 100644
--- a/pymongo/synchronous/helpers.py
+++ b/pymongo/synchronous/helpers.py
@@ -313,9 +313,10 @@ def _handle_reauth(func: F) -> F:
     return cast(F, inner)
 
 
-def next(cls: Any) -> Any:
-    """Compatibility function until we drop 3.9 support: https://docs.python.org/3/library/functions.html#anext."""
-    if sys.version_info >= (3, 10):
-        return builtins.next(cls)
-    else:
+if sys.version_info >= (3, 10):
+    next = builtins.next
+else:
+
+    def next(cls: Any) -> Any:
+        """Compatibility function until we drop 3.9 support: https://docs.python.org/3/library/functions.html#anext."""
         return cls.__next__()
diff --git a/pymongo/synchronous/mongo_client.py b/pymongo/synchronous/mongo_client.py
index ddc9ae9a2..31b9cbc5f 100644
--- a/pymongo/synchronous/mongo_client.py
+++ b/pymongo/synchronous/mongo_client.py
@@ -111,7 +111,6 @@ from pymongo.synchronous.uri_parser import (
 from pymongo.write_concern import DEFAULT_WRITE_CONCERN, WriteConcern
 
 if TYPE_CHECKING:
-    import sys
     from types import TracebackType
 
     from bson.objectid import ObjectId
@@ -125,11 +124,6 @@ if TYPE_CHECKING:
     from pymongo.synchronous.server import Server
     from pymongo.synchronous.server_selectors import Selection
 
-    if sys.version_info[:2] >= (3, 9):
-        pass
-    else:
-        # Deprecated since version 3.9: collections.abc.Generator now supports [].
-        pass
 
 T = TypeVar("T")
 
diff --git a/pymongo/synchronous/pool.py b/pymongo/synchronous/pool.py
index b71cec220..2026ba066 100644
--- a/pymongo/synchronous/pool.py
+++ b/pymongo/synchronous/pool.py
@@ -194,14 +194,9 @@ else:
 _METADATA: dict[str, Any] = {"driver": {"name": "PyMongo", "version": __version__}}
 
 if sys.platform.startswith("linux"):
-    # platform.linux_distribution was deprecated in Python 3.5
-    # and removed in Python 3.8. Starting in Python 3.5 it
-    # raises DeprecationWarning
-    # DeprecationWarning: dist() and linux_distribution() functions are deprecated in Python 3.5
-    _name = platform.system()
     _METADATA["os"] = {
-        "type": _name,
-        "name": _name,
+        "type": platform.system(),
+        "name": platform.system(),
         "architecture": platform.machine(),
         # Kernel version (e.g. 4.4.0-17-generic).
         "version": platform.release(),
diff --git a/test/unified_format.py b/test/unified_format.py
index fe1419c0d..0c200a15a 100644
--- a/test/unified_format.py
+++ b/test/unified_format.py
@@ -195,14 +195,10 @@ def with_metaclass(meta, *bases):
     # the actual metaclass.
     class metaclass(type):
         def __new__(cls, name, this_bases, d):
-            if sys.version_info[:2] >= (3, 7):  # noqa: UP036
-                # This version introduced PEP 560 that requires a bit
-                # of extra care (we mimic what is done by __build_class__).
-                resolved_bases = types.resolve_bases(bases)
-                if resolved_bases is not bases:
-                    d["__orig_bases__"] = bases
-            else:
-                resolved_bases = bases
+            # __orig_bases__ is required by PEP 560.
+            resolved_bases = types.resolve_bases(bases)
+            if resolved_bases is not bases:
+                d["__orig_bases__"] = bases
             return meta(name, resolved_bases, d)
 
         @classmethod