diff --git a/pymongo/asynchronous/pool.py b/pymongo/asynchronous/pool.py
index f521091e3c..4e1e7c0638 100644
--- a/pymongo/asynchronous/pool.py
+++ b/pymongo/asynchronous/pool.py
@@ -104,21 +104,6 @@
     from pymongo.typings import _Address, _CollationIn
     from pymongo.write_concern import WriteConcern
 
-try:
-    from fcntl import F_GETFD, F_SETFD, FD_CLOEXEC, fcntl
-
-    def _set_non_inheritable_non_atomic(fd: int) -> None:
-        """Set the close-on-exec flag on the given file descriptor."""
-        flags = fcntl(fd, F_GETFD)
-        fcntl(fd, F_SETFD, flags | FD_CLOEXEC)
-
-except ImportError:
-    # Windows, various platforms we don't claim to support
-    # (Jython, IronPython, ..), systems that don't provide
-    # everything we need from fcntl, etc.
-    def _set_non_inheritable_non_atomic(fd: int) -> None:  # noqa: ARG001
-        """Dummy function for platforms that don't provide fcntl."""
-
 
 _IS_SYNC = False
 
@@ -706,8 +691,6 @@ class PoolState:
     CLOSED = 3
 
 
-# Do *not* explicitly inherit from object or Jython won't call __del__
-# https://bugs.jython.org/issue1057
 class Pool:
     def __init__(
         self,
diff --git a/pymongo/message.py b/pymongo/message.py
index 0f3aaaba77..b0d1ceb105 100644
--- a/pymongo/message.py
+++ b/pymongo/message.py
@@ -1298,8 +1298,6 @@ def _batched_write_command_impl(
 
     # Start of payload
     buf.seek(-1, 2)
-    # Work around some Jython weirdness.
-    buf.truncate()
     try:
         buf.write(_OP_MAP[operation])
     except KeyError:
diff --git a/pymongo/pool_options.py b/pymongo/pool_options.py
index a5d76007b0..d4c00ac46c 100644
--- a/pymongo/pool_options.py
+++ b/pymongo/pool_options.py
@@ -79,17 +79,6 @@
         # Windows patch level (e.g. 10.0.17763-SP0).
         "version": ".".join(map(str, _ver[:3])) + f"-SP{_ver[-1] or '0'}",
     }
-elif sys.platform.startswith("java"):
-    _name, _ver, _arch = platform.java_ver()[-1]
-    _METADATA["os"] = {
-        # Linux, Windows 7, Mac OS X, etc.
-        "type": _name,
-        "name": _name,
-        # x86, x86_64, AMD64, etc.
-        "architecture": _arch,
-        # Linux kernel version, OSX version, etc.
-        "version": _ver,
-    }
 else:
     # Get potential alias (e.g. SunOS 5.11 becomes Solaris 2.11)
     _aliased = platform.system_alias(platform.system(), platform.release(), platform.version())
@@ -108,14 +97,6 @@
             "(Python %s)" % ".".join(map(str, sys.version_info)),
         )
     )
-elif sys.platform.startswith("java"):
-    _METADATA["platform"] = " ".join(
-        (
-            platform.python_implementation(),
-            ".".join(map(str, sys.version_info)),
-            "(%s)" % " ".join((platform.system(), platform.release())),
-        )
-    )
 else:
     _METADATA["platform"] = " ".join(
         (platform.python_implementation(), ".".join(map(str, sys.version_info)))
diff --git a/pymongo/pool_shared.py b/pymongo/pool_shared.py
index 8db26ccead..a6f434885b 100644
--- a/pymongo/pool_shared.py
+++ b/pymongo/pool_shared.py
@@ -237,8 +237,7 @@ async def _async_create_connection(address: _Address, options: PoolOptions) -> s
     else:
         # This likely means we tried to connect to an IPv6 only
         # host with an OS/kernel or Python interpreter that doesn't
-        # support IPv6. The test case is Jython2.5.1 which doesn't
-        # support IPv6 at all.
+        # support IPv6.
         raise OSError("getaddrinfo failed")
 
 
@@ -418,8 +417,7 @@ def _create_connection(address: _Address, options: PoolOptions) -> socket.socket
     else:
         # This likely means we tried to connect to an IPv6 only
         # host with an OS/kernel or Python interpreter that doesn't
-        # support IPv6. The test case is Jython2.5.1 which doesn't
-        # support IPv6 at all.
+        # support IPv6.
         raise OSError("getaddrinfo failed")
 
 
diff --git a/pymongo/socket_checker.py b/pymongo/socket_checker.py
index 78861854ab..a2f65ebc38 100644
--- a/pymongo/socket_checker.py
+++ b/pymongo/socket_checker.py
@@ -17,12 +17,9 @@
 
 import errno
 import select
-import sys
 from typing import Any, Optional, cast
 
-# PYTHON-2320: Jython does not fully support poll on SSL sockets,
-# https://bugs.jython.org/issue2900
-_HAVE_POLL = hasattr(select, "poll") and not sys.platform.startswith("java")
+_HAVE_POLL = hasattr(select, "poll")
 _SelectError = getattr(select, "error", OSError)
 
 
diff --git a/pymongo/synchronous/pool.py b/pymongo/synchronous/pool.py
index 66258fda18..89d2080bc8 100644
--- a/pymongo/synchronous/pool.py
+++ b/pymongo/synchronous/pool.py
@@ -104,21 +104,6 @@
     from pymongo.typings import _Address, _CollationIn
     from pymongo.write_concern import WriteConcern
 
-try:
-    from fcntl import F_GETFD, F_SETFD, FD_CLOEXEC, fcntl
-
-    def _set_non_inheritable_non_atomic(fd: int) -> None:
-        """Set the close-on-exec flag on the given file descriptor."""
-        flags = fcntl(fd, F_GETFD)
-        fcntl(fd, F_SETFD, flags | FD_CLOEXEC)
-
-except ImportError:
-    # Windows, various platforms we don't claim to support
-    # (Jython, IronPython, ..), systems that don't provide
-    # everything we need from fcntl, etc.
-    def _set_non_inheritable_non_atomic(fd: int) -> None:  # noqa: ARG001
-        """Dummy function for platforms that don't provide fcntl."""
-
 
 _IS_SYNC = True
 
@@ -704,8 +689,6 @@ class PoolState:
     CLOSED = 3
 
 
-# Do *not* explicitly inherit from object or Jython won't call __del__
-# https://bugs.jython.org/issue1057
 class Pool:
     def __init__(
         self,
diff --git a/test/asynchronous/test_client.py b/test/asynchronous/test_client.py
index 6794605339..15b32c4e99 100644
--- a/test/asynchronous/test_client.py
+++ b/test/asynchronous/test_client.py
@@ -1066,9 +1066,6 @@ async def test_close(self):
             await coll.count_documents({})
 
     async def test_close_kills_cursors(self):
-        if sys.platform.startswith("java"):
-            # We can't figure out how to make this test reliable with Jython.
-            raise SkipTest("Can't test with Jython")
         test_client = await self.async_rs_or_single_client()
         # Kill any cursors possibly queued up by previous tests.
         gc.collect()
@@ -1088,7 +1085,7 @@ async def test_close_kills_cursors(self):
         cursor = await coll.aggregate([], batchSize=10)
         self.assertTrue(bool(await anext(cursor)))
         del cursor
-        # Required for PyPy, Jython and other Python implementations that
+        # Required for PyPy and other Python implementations that
         # don't use reference counting garbage collection.
         gc.collect()
 
@@ -1456,12 +1453,6 @@ async def test_contextlib(self):
 
     @async_client_context.require_sync
     def test_interrupt_signal(self):
-        if sys.platform.startswith("java"):
-            # We can't figure out how to raise an exception on a thread that's
-            # blocked on a socket, whether that's the main thread or a worker,
-            # without simply killing the whole thread in Jython. This suggests
-            # PYTHON-294 can't actually occur in Jython.
-            raise SkipTest("Can't test interrupts in Jython")
         if is_greenthread_patched():
             raise SkipTest("Can't reliably test interrupts with green threads")
 
diff --git a/test/asynchronous/test_database.py b/test/asynchronous/test_database.py
index b49183a852..c1edb7a296 100644
--- a/test/asynchronous/test_database.py
+++ b/test/asynchronous/test_database.py
@@ -475,7 +475,7 @@ async def test_id_ordering(self):
         # when you iterate key/value pairs in a document.
         # This isn't reliable since python dicts don't
         # guarantee any particular order. This will never
-        # work right in Jython or any Python or environment
+        # work right in any Python or environment
         # with hash randomization enabled (e.g. tox).
         db = self.client.pymongo_test
         await db.test.drop()
diff --git a/test/asynchronous/utils_spec_runner.py b/test/asynchronous/utils_spec_runner.py
index 496c28a045..63e7e9e150 100644
--- a/test/asynchronous/utils_spec_runner.py
+++ b/test/asynchronous/utils_spec_runner.py
@@ -597,9 +597,7 @@ async def run_test_ops(self, sessions, collection, test):
 
     def parse_client_options(self, opts):
         """Allow encryption spec to override a clientOptions parsing."""
-        # Convert test['clientOptions'] to dict to avoid a Jython bug using
-        # "**" with ScenarioDict.
-        return dict(opts)
+        return opts
 
     async def setup_scenario(self, scenario_def):
         """Allow specs to override a test's setup."""
diff --git a/test/test_bson.py b/test/test_bson.py
index f49ae680e0..ffc02965fb 100644
--- a/test/test_bson.py
+++ b/test/test_bson.py
@@ -135,10 +135,6 @@ def assertInvalid(self, data):
         self.assertRaises(InvalidBSON, decode, data)
 
     def check_encode_then_decode(self, doc_class=dict, decoder=decode, encoder=encode):
-        # Work around http://bugs.jython.org/issue1728
-        if sys.platform.startswith("java"):
-            doc_class = SON
-
         def helper(doc):
             self.assertEqual(doc, (decoder(encoder(doc_class(doc)))))
             self.assertEqual(doc, decoder(encoder(doc)))
diff --git a/test/test_bson_corpus.py b/test/test_bson_corpus.py
index 504025e766..3370c18bda 100644
--- a/test/test_bson_corpus.py
+++ b/test/test_bson_corpus.py
@@ -160,11 +160,6 @@ def run_test(self):
                     self.assertIsInstance(decoded_bson[test_key], _DEPRECATED_BSON_TYPES[bson_type])
                 continue
 
-            # Jython can't handle NaN with a payload from
-            # struct.(un)pack if endianness is specified in the format string.
-            if not (sys.platform.startswith("java") and description == "NaN with payload"):
-                # Test round-tripping canonical bson.
-                self.assertEqual(encode_bson(decoded_bson), cB, description)
             self.assertJsonEqual(encode_extjson(decoded_bson), cEJ)
 
             # Test round-tripping canonical extended json.
diff --git a/test/test_client.py b/test/test_client.py
index 9d201c663b..d07ce32365 100644
--- a/test/test_client.py
+++ b/test/test_client.py
@@ -1039,9 +1039,6 @@ def test_close(self):
             coll.count_documents({})
 
     def test_close_kills_cursors(self):
-        if sys.platform.startswith("java"):
-            # We can't figure out how to make this test reliable with Jython.
-            raise SkipTest("Can't test with Jython")
         test_client = self.rs_or_single_client()
         # Kill any cursors possibly queued up by previous tests.
         gc.collect()
@@ -1061,7 +1058,7 @@ def test_close_kills_cursors(self):
         cursor = coll.aggregate([], batchSize=10)
         self.assertTrue(bool(next(cursor)))
         del cursor
-        # Required for PyPy, Jython and other Python implementations that
+        # Required for PyPy and other Python implementations that
         # don't use reference counting garbage collection.
         gc.collect()
 
@@ -1415,12 +1412,6 @@ def test_contextlib(self):
 
     @client_context.require_sync
     def test_interrupt_signal(self):
-        if sys.platform.startswith("java"):
-            # We can't figure out how to raise an exception on a thread that's
-            # blocked on a socket, whether that's the main thread or a worker,
-            # without simply killing the whole thread in Jython. This suggests
-            # PYTHON-294 can't actually occur in Jython.
-            raise SkipTest("Can't test interrupts in Jython")
         if is_greenthread_patched():
             raise SkipTest("Can't reliably test interrupts with green threads")
 
diff --git a/test/test_database.py b/test/test_database.py
index ebbf6e55c6..25c3275238 100644
--- a/test/test_database.py
+++ b/test/test_database.py
@@ -470,7 +470,7 @@ def test_id_ordering(self):
         # when you iterate key/value pairs in a document.
         # This isn't reliable since python dicts don't
         # guarantee any particular order. This will never
-        # work right in Jython or any Python or environment
+        # work right in any Python or environment
         # with hash randomization enabled (e.g. tox).
         db = self.client.pymongo_test
         db.test.drop()
diff --git a/test/utils_spec_runner.py b/test/utils_spec_runner.py
index 46adeaefb5..9bf155e8f3 100644
--- a/test/utils_spec_runner.py
+++ b/test/utils_spec_runner.py
@@ -597,9 +597,7 @@ def run_test_ops(self, sessions, collection, test):
 
     def parse_client_options(self, opts):
         """Allow encryption spec to override a clientOptions parsing."""
-        # Convert test['clientOptions'] to dict to avoid a Jython bug using
-        # "**" with ScenarioDict.
-        return dict(opts)
+        return opts
 
     def setup_scenario(self, scenario_def):
         """Allow specs to override a test's setup."""