diff --git a/.evergreen/combine-coverage.sh b/.evergreen/combine-coverage.sh
index 7db4a6cbc..92d2f1f1f 100644
--- a/.evergreen/combine-coverage.sh
+++ b/.evergreen/combine-coverage.sh
@@ -15,7 +15,7 @@ fi
 createvirtualenv "$PYTHON_BINARY" covenv
 # Keep in sync with run-tests.sh
 # coverage >=5 is needed for relative_files=true.
-pip install -q "coverage>=5,<=7.5"
+pip install -q "coverage[toml]>=5,<=7.5"
 
 pip list
 ls -la coverage/
diff --git a/.evergreen/config.yml b/.evergreen/config.yml
index af9a49659..8f32b8a1b 100644
--- a/.evergreen/config.yml
+++ b/.evergreen/config.yml
@@ -2854,7 +2854,7 @@ buildvariants:
   matrix_spec:
     platform: rhel7
     # Python 3.10+ requires OpenSSL 1.1.1+
-    python-version: ["3.8", "3.9", "pypy3.9", "pypy3.10"]
+    python-version: ["3.8", "3.9"]
     auth-ssl: "*"
   display_name: "OpenSSL 1.0.2 ${python-version} ${platform} ${auth-ssl}"
   tasks:
@@ -3153,7 +3153,7 @@ buildvariants:
 
 - name: testazurekms-variant
   display_name: "Azure KMS"
-  run_on: rhel87-small
+  run_on: debian11-small
   tasks:
     - name: testazurekms_task_group
       batchtime: 20160 # Use a batchtime of 14 days as suggested by the CSFLE test README
diff --git a/.evergreen/utils.sh b/.evergreen/utils.sh
index f881d9190..ff186c6e1 100755
--- a/.evergreen/utils.sh
+++ b/.evergreen/utils.sh
@@ -67,7 +67,6 @@ createvirtualenv () {
 
     export PIP_QUIET=1
     python -m pip install --upgrade pip
-    python -m pip install --upgrade hatch
 }
 
 # Usage:
diff --git a/pymongo/network_layer.py b/pymongo/network_layer.py
index 6087b1aa8..f1c378b9b 100644
--- a/pymongo/network_layer.py
+++ b/pymongo/network_layer.py
@@ -18,32 +18,111 @@ from __future__ import annotations
 import asyncio
 import socket
 import struct
+import sys
+from asyncio import AbstractEventLoop, Future
 from typing import (
-    TYPE_CHECKING,
     Union,
 )
 
 from pymongo import ssl_support
 
-if TYPE_CHECKING:
-    from pymongo.pyopenssl_context import _sslConn
+try:
+    from ssl import SSLError, SSLSocket
+
+    _HAVE_SSL = True
+except ImportError:
+    _HAVE_SSL = False
+
+try:
+    from pymongo.pyopenssl_context import (
+        BLOCKING_IO_LOOKUP_ERROR,
+        BLOCKING_IO_READ_ERROR,
+        BLOCKING_IO_WRITE_ERROR,
+        _sslConn,
+    )
+
+    _HAVE_PYOPENSSL = True
+except ImportError:
+    _HAVE_PYOPENSSL = False
+    _sslConn = SSLSocket  # type: ignore
+    from pymongo.ssl_support import (  # type: ignore[assignment]
+        BLOCKING_IO_LOOKUP_ERROR,
+        BLOCKING_IO_READ_ERROR,
+        BLOCKING_IO_WRITE_ERROR,
+    )
 
 _UNPACK_HEADER = struct.Struct("<iiii").unpack
 _UNPACK_COMPRESSION_HEADER = struct.Struct("<iiB").unpack
 _POLL_TIMEOUT = 0.5
 # Errors raised by sockets (and TLS sockets) when in non-blocking mode.
-BLOCKING_IO_ERRORS = (BlockingIOError, *ssl_support.BLOCKING_IO_ERRORS)
+BLOCKING_IO_ERRORS = (BlockingIOError, BLOCKING_IO_LOOKUP_ERROR, *ssl_support.BLOCKING_IO_ERRORS)
 
 
-async def async_sendall(socket: Union[socket.socket, _sslConn], buf: bytes) -> None:
-    timeout = socket.gettimeout()
-    socket.settimeout(0.0)
+async def async_sendall(sock: Union[socket.socket, _sslConn], buf: bytes) -> None:
+    timeout = sock.gettimeout()
+    sock.settimeout(0.0)
     loop = asyncio.get_event_loop()
     try:
-        await asyncio.wait_for(loop.sock_sendall(socket, buf), timeout=timeout)  # type: ignore[arg-type]
+        if _HAVE_SSL and isinstance(sock, (SSLSocket, _sslConn)):
+            if sys.platform == "win32":
+                await asyncio.wait_for(_async_sendall_ssl_windows(sock, buf), timeout=timeout)
+            else:
+                await asyncio.wait_for(_async_sendall_ssl(sock, buf, loop), timeout=timeout)
+        else:
+            await asyncio.wait_for(loop.sock_sendall(sock, buf), timeout=timeout)  # type: ignore[arg-type]
     finally:
-        socket.settimeout(timeout)
+        sock.settimeout(timeout)
 
 
-def sendall(socket: Union[socket.socket, _sslConn], buf: bytes) -> None:
-    socket.sendall(buf)
+async def _async_sendall_ssl(
+    sock: Union[socket.socket, _sslConn], buf: bytes, loop: AbstractEventLoop
+) -> None:
+    fd = sock.fileno()
+    sent = 0
+
+    def _is_ready(fut: Future) -> None:
+        loop.remove_writer(fd)
+        loop.remove_reader(fd)
+        if fut.done():
+            return
+        fut.set_result(None)
+
+    while sent < len(buf):
+        try:
+            sent += sock.send(buf)
+        except BLOCKING_IO_ERRORS as exc:
+            fd = sock.fileno()
+            # Check for closed socket.
+            if fd == -1:
+                raise SSLError("Underlying socket has been closed") from None
+            if isinstance(exc, BLOCKING_IO_READ_ERROR):
+                fut = loop.create_future()
+                loop.add_reader(fd, _is_ready, fut)
+                await fut
+            if isinstance(exc, BLOCKING_IO_WRITE_ERROR):
+                fut = loop.create_future()
+                loop.add_writer(fd, _is_ready, fut)
+                await fut
+            if _HAVE_PYOPENSSL and isinstance(exc, BLOCKING_IO_LOOKUP_ERROR):
+                fut = loop.create_future()
+                loop.add_reader(fd, _is_ready, fut)
+                loop.add_writer(fd, _is_ready, fut)
+                await fut
+
+
+# The default Windows asyncio event loop does not support loop.add_reader/add_writer: https://docs.python.org/3/library/asyncio-platforms.html#asyncio-platform-support
+async def _async_sendall_ssl_windows(sock: Union[socket.socket, _sslConn], buf: bytes) -> None:
+    view = memoryview(buf)
+    total_length = len(buf)
+    total_sent = 0
+    while total_sent < total_length:
+        try:
+            sent = sock.send(view[total_sent:])
+        except BLOCKING_IO_ERRORS:
+            await asyncio.sleep(0.5)
+            sent = 0
+        total_sent += sent
+
+
+def sendall(sock: Union[socket.socket, _sslConn], buf: bytes) -> None:
+    sock.sendall(buf)
diff --git a/pymongo/pyopenssl_context.py b/pymongo/pyopenssl_context.py
index c1b85af12..4f6f6f4a8 100644
--- a/pymongo/pyopenssl_context.py
+++ b/pymongo/pyopenssl_context.py
@@ -90,6 +90,9 @@ def _is_ip_address(address: Any) -> bool:
 # According to the docs for socket.send it can raise
 # WantX509LookupError and should be retried.
 BLOCKING_IO_ERRORS = (_SSL.WantReadError, _SSL.WantWriteError, _SSL.WantX509LookupError)
+BLOCKING_IO_READ_ERROR = _SSL.WantReadError
+BLOCKING_IO_WRITE_ERROR = _SSL.WantWriteError
+BLOCKING_IO_LOOKUP_ERROR = _SSL.WantX509LookupError
 
 
 def _ragged_eof(exc: BaseException) -> bool:
diff --git a/pymongo/ssl_context.py b/pymongo/ssl_context.py
index 1a0424208..ee32145c0 100644
--- a/pymongo/ssl_context.py
+++ b/pymongo/ssl_context.py
@@ -30,6 +30,8 @@ IS_PYOPENSSL = False
 
 # Errors raised by SSL sockets when in non-blocking mode.
 BLOCKING_IO_ERRORS = (_ssl.SSLWantReadError, _ssl.SSLWantWriteError)
+BLOCKING_IO_READ_ERROR = _ssl.SSLWantReadError
+BLOCKING_IO_WRITE_ERROR = _ssl.SSLWantWriteError
 
 # Base Exception class
 SSLError = _ssl.SSLError
diff --git a/pymongo/ssl_support.py b/pymongo/ssl_support.py
index 6a5dd278d..580d71f9b 100644
--- a/pymongo/ssl_support.py
+++ b/pymongo/ssl_support.py
@@ -53,6 +53,9 @@ if HAVE_SSL:
     IPADDR_SAFE = True
     SSLError = _ssl.SSLError
     BLOCKING_IO_ERRORS = _ssl.BLOCKING_IO_ERRORS
+    BLOCKING_IO_READ_ERROR = _ssl.BLOCKING_IO_READ_ERROR
+    BLOCKING_IO_WRITE_ERROR = _ssl.BLOCKING_IO_WRITE_ERROR
+    BLOCKING_IO_LOOKUP_ERROR = BLOCKING_IO_READ_ERROR
 
     def get_ssl_context(
         certfile: Optional[str],
diff --git a/test/__init__.py b/test/__init__.py
index b603ae0a5..b8394bd13 100644
--- a/test/__init__.py
+++ b/test/__init__.py
@@ -728,9 +728,9 @@ class ClientContext:
 
     def require_failCommand_appName(self, func):
         """Run a test only if the server supports the failCommand appName."""
-        # SERVER-47195
+        # SERVER-47195 and SERVER-49336.
         return self._require(
-            lambda: (self.test_commands_enabled and self.version >= (4, 4, -1)),
+            lambda: (self.test_commands_enabled and self.version >= (4, 4, 7)),
             "failCommand appName must be supported",
             func=func,
         )
diff --git a/test/asynchronous/__init__.py b/test/asynchronous/__init__.py
index 878ef81ba..4098d9af8 100644
--- a/test/asynchronous/__init__.py
+++ b/test/asynchronous/__init__.py
@@ -730,9 +730,9 @@ class AsyncClientContext:
 
     def require_failCommand_appName(self, func):
         """Run a test only if the server supports the failCommand appName."""
-        # SERVER-47195
+        # SERVER-47195 and SERVER-49336.
         return self._require(
-            lambda: (self.test_commands_enabled and self.version >= (4, 4, -1)),
+            lambda: (self.test_commands_enabled and self.version >= (4, 4, 7)),
             "failCommand appName must be supported",
             func=func,
         )
diff --git a/test/connection_monitoring/pool-checkin-make-available.json b/test/connection_monitoring/pool-checkin-make-available.json
index 41c522ae6..3f37f188c 100644
--- a/test/connection_monitoring/pool-checkin-make-available.json
+++ b/test/connection_monitoring/pool-checkin-make-available.json
@@ -22,7 +22,8 @@
     {
       "type": "ConnectionCheckedOut",
       "connectionId": 1,
-      "address": 42
+      "address": 42,
+      "duration": 42
     },
     {
       "type": "ConnectionCheckedIn",
@@ -32,7 +33,8 @@
     {
       "type": "ConnectionCheckedOut",
       "connectionId": 1,
-      "address": 42
+      "address": 42,
+      "duration": 42
     }
   ],
   "ignore": [
diff --git a/test/connection_monitoring/pool-checkout-connection.json b/test/connection_monitoring/pool-checkout-connection.json
index d89b34260..c7e8914d4 100644
--- a/test/connection_monitoring/pool-checkout-connection.json
+++ b/test/connection_monitoring/pool-checkout-connection.json
@@ -23,12 +23,14 @@
     {
       "type": "ConnectionReady",
       "connectionId": 1,
-      "address": 42
+      "address": 42,
+      "duration": 42
     },
     {
       "type": "ConnectionCheckedOut",
       "connectionId": 1,
-      "address": 42
+      "address": 42,
+      "duration": 42
     }
   ],
   "ignore": [
diff --git a/test/connection_monitoring/pool-checkout-error-closed.json b/test/connection_monitoring/pool-checkout-error-closed.json
index ee2926e1c..614403ef5 100644
--- a/test/connection_monitoring/pool-checkout-error-closed.json
+++ b/test/connection_monitoring/pool-checkout-error-closed.json
@@ -38,7 +38,8 @@
     {
       "type": "ConnectionCheckedOut",
       "address": 42,
-      "connectionId": 42
+      "connectionId": 42,
+      "duration": 42
     },
     {
       "type": "ConnectionCheckedIn",
@@ -56,6 +57,7 @@
     {
       "type": "ConnectionCheckOutFailed",
       "address": 42,
+      "duration": 42,
       "reason": "poolClosed"
     }
   ],
diff --git a/test/connection_monitoring/pool-checkout-maxConnecting-timeout.json b/test/connection_monitoring/pool-checkout-maxConnecting-timeout.json
index 84ddf8fdb..4d9fda1a6 100644
--- a/test/connection_monitoring/pool-checkout-maxConnecting-timeout.json
+++ b/test/connection_monitoring/pool-checkout-maxConnecting-timeout.json
@@ -89,7 +89,8 @@
     {
       "type": "ConnectionCheckOutFailed",
       "reason": "timeout",
-      "address": 42
+      "address": 42,
+      "duration": 42
     }
   ],
   "ignore": [
diff --git a/test/connection_monitoring/pool-clear-clears-waitqueue.json b/test/connection_monitoring/pool-clear-clears-waitqueue.json
index d4aef928c..e6077f12a 100644
--- a/test/connection_monitoring/pool-clear-clears-waitqueue.json
+++ b/test/connection_monitoring/pool-clear-clears-waitqueue.json
@@ -59,7 +59,8 @@
     },
     {
       "type": "ConnectionCheckedOut",
-      "address": 42
+      "address": 42,
+      "duration": 42
     },
     {
       "type": "ConnectionCheckOutStarted",
@@ -76,17 +77,20 @@
     {
       "type": "ConnectionCheckOutFailed",
       "reason": "connectionError",
-      "address": 42
+      "address": 42,
+      "duration": 42
     },
     {
       "type": "ConnectionCheckOutFailed",
       "reason": "connectionError",
-      "address": 42
+      "address": 42,
+      "duration": 42
     },
     {
       "type": "ConnectionCheckOutFailed",
       "reason": "connectionError",
-      "address": 42
+      "address": 42,
+      "duration": 42
     }
   ],
   "ignore": [
diff --git a/test/connection_monitoring/pool-clear-interrupting-pending-connections.json b/test/connection_monitoring/pool-clear-interrupting-pending-connections.json
index ceae07a1c..c1fd74632 100644
--- a/test/connection_monitoring/pool-clear-interrupting-pending-connections.json
+++ b/test/connection_monitoring/pool-clear-interrupting-pending-connections.json
@@ -17,7 +17,7 @@
       ],
       "closeConnection": false,
       "blockConnection": true,
-      "blockTimeMS": 1000
+      "blockTimeMS": 10000
     }
   },
   "poolOptions": {
diff --git a/test/connection_monitoring/pool-clear-ready.json b/test/connection_monitoring/pool-clear-ready.json
index 800c3545a..88c2988ac 100644
--- a/test/connection_monitoring/pool-clear-ready.json
+++ b/test/connection_monitoring/pool-clear-ready.json
@@ -40,7 +40,8 @@
     {
       "type": "ConnectionCheckedOut",
       "address": 42,
-      "connectionId": 42
+      "connectionId": 42,
+      "duration": 42
     },
     {
       "type": "ConnectionPoolCleared",
@@ -49,6 +50,7 @@
     {
       "type": "ConnectionCheckOutFailed",
       "address": 42,
+      "duration": 42,
       "reason": "connectionError"
     },
     {
@@ -57,7 +59,8 @@
     },
     {
       "type": "ConnectionCheckedOut",
-      "address": 42
+      "address": 42,
+      "duration": 42
     }
   ],
   "ignore": [
diff --git a/test/connection_monitoring/pool-ready.json b/test/connection_monitoring/pool-ready.json
index 29ce7326c..a90aed04d 100644
--- a/test/connection_monitoring/pool-ready.json
+++ b/test/connection_monitoring/pool-ready.json
@@ -31,7 +31,8 @@
     {
       "type": "ConnectionCheckOutFailed",
       "reason": "connectionError",
-      "address": 42
+      "address": 42,
+      "duration": 42
     },
     {
       "type": "ConnectionPoolReady",
@@ -47,7 +48,8 @@
     },
     {
       "type": "ConnectionCheckedOut",
-      "address": 42
+      "address": 42,
+      "duration": 42
     }
   ],
   "ignore": [
diff --git a/test/connection_monitoring/wait-queue-timeout.json b/test/connection_monitoring/wait-queue-timeout.json
index fbcbdfb04..8bd7c4949 100644
--- a/test/connection_monitoring/wait-queue-timeout.json
+++ b/test/connection_monitoring/wait-queue-timeout.json
@@ -48,7 +48,8 @@
     {
       "type": "ConnectionCheckedOut",
       "connectionId": 42,
-      "address": 42
+      "address": 42,
+      "duration": 42
     },
     {
       "type": "ConnectionCheckOutStarted",
@@ -57,7 +58,8 @@
     {
       "type": "ConnectionCheckOutFailed",
       "reason": "timeout",
-      "address": 42
+      "address": 42,
+      "duration": 42
     },
     {
       "type": "ConnectionCheckedIn",
diff --git a/test/csot/change-streams.json b/test/csot/change-streams.json
index a8b2b7e17..8cffb08e2 100644
--- a/test/csot/change-streams.json
+++ b/test/csot/change-streams.json
@@ -6,7 +6,7 @@
       "minServerVersion": "4.4",
       "topologies": [
         "replicaset",
-        "sharded-replicaset"
+        "sharded"
       ]
     }
   ],
@@ -104,7 +104,7 @@
                   "aggregate"
                 ],
                 "blockConnection": true,
-                "blockTimeMS": 55
+                "blockTimeMS": 250
               }
             }
           }
@@ -114,7 +114,7 @@
           "object": "collection",
           "arguments": {
             "pipeline": [],
-            "timeoutMS": 50
+            "timeoutMS": 200
           },
           "expectError": {
             "isTimeoutError": true
@@ -242,7 +242,7 @@
                   "getMore"
                 ],
                 "blockConnection": true,
-                "blockTimeMS": 15
+                "blockTimeMS": 150
               }
             }
           }
@@ -252,7 +252,7 @@
           "object": "collection",
           "arguments": {
             "pipeline": [],
-            "timeoutMS": 20,
+            "timeoutMS": 200,
             "batchSize": 2,
             "maxAwaitTimeMS": 1
           },
@@ -310,7 +310,7 @@
           "object": "collection",
           "arguments": {
             "pipeline": [],
-            "timeoutMS": 20
+            "timeoutMS": 200
           },
           "saveResultAsEntity": "changeStream"
         },
@@ -330,7 +330,7 @@
                   "aggregate"
                 ],
                 "blockConnection": true,
-                "blockTimeMS": 12,
+                "blockTimeMS": 120,
                 "errorCode": 7,
                 "errorLabels": [
                   "ResumableChangeStreamError"
@@ -412,7 +412,7 @@
           "arguments": {
             "pipeline": [],
             "maxAwaitTimeMS": 1,
-            "timeoutMS": 100
+            "timeoutMS": 200
           },
           "saveResultAsEntity": "changeStream"
         },
@@ -431,7 +431,7 @@
                   "getMore"
                 ],
                 "blockConnection": true,
-                "blockTimeMS": 150
+                "blockTimeMS": 250
               }
             }
           }
@@ -534,7 +534,7 @@
                   "getMore"
                 ],
                 "blockConnection": true,
-                "blockTimeMS": 15
+                "blockTimeMS": 250
               }
             }
           }
@@ -544,7 +544,7 @@
           "object": "collection",
           "arguments": {
             "pipeline": [],
-            "timeoutMS": 10
+            "timeoutMS": 200
           },
           "saveResultAsEntity": "changeStream"
         },
diff --git a/test/csot/close-cursors.json b/test/csot/close-cursors.json
index 1361971c4..79b0de7b6 100644
--- a/test/csot/close-cursors.json
+++ b/test/csot/close-cursors.json
@@ -75,7 +75,7 @@
                   "getMore"
                 ],
                 "blockConnection": true,
-                "blockTimeMS": 50
+                "blockTimeMS": 250
               }
             }
           }
@@ -86,7 +86,7 @@
           "arguments": {
             "filter": {},
             "batchSize": 2,
-            "timeoutMS": 20
+            "timeoutMS": 200
           },
           "saveResultAsEntity": "cursor"
         },
@@ -175,7 +175,7 @@
                   "killCursors"
                 ],
                 "blockConnection": true,
-                "blockTimeMS": 30
+                "blockTimeMS": 250
               }
             }
           }
@@ -186,7 +186,7 @@
           "arguments": {
             "filter": {},
             "batchSize": 2,
-            "timeoutMS": 20
+            "timeoutMS": 200
           },
           "saveResultAsEntity": "cursor"
         },
@@ -194,7 +194,7 @@
           "name": "close",
           "object": "cursor",
           "arguments": {
-            "timeoutMS": 40
+            "timeoutMS": 400
           }
         }
       ],
@@ -215,7 +215,7 @@
             {
               "commandStartedEvent": {
                 "command": {
-                  "killCursors": "collection",
+                  "killCursors": "coll",
                   "maxTimeMS": {
                     "$$type": [
                       "int",
diff --git a/test/csot/command-execution.json b/test/csot/command-execution.json
index f0858791e..aa9c3eb23 100644
--- a/test/csot/command-execution.json
+++ b/test/csot/command-execution.json
@@ -3,11 +3,10 @@
   "schemaVersion": "1.9",
   "runOnRequirements": [
     {
-      "minServerVersion": "4.9",
+      "minServerVersion": "4.4.7",
       "topologies": [
         "single",
         "replicaset",
-        "sharded-replicaset",
         "sharded"
       ],
       "serverless": "forbid"
@@ -52,7 +51,7 @@
                 ],
                 "appName": "reduceMaxTimeMSTest",
                 "blockConnection": true,
-                "blockTimeMS": 75
+                "blockTimeMS": 50
               }
             }
           }
diff --git a/test/csot/convenient-transactions.json b/test/csot/convenient-transactions.json
index 0c8cc6edd..3868b3026 100644
--- a/test/csot/convenient-transactions.json
+++ b/test/csot/convenient-transactions.json
@@ -6,7 +6,7 @@
       "minServerVersion": "4.4",
       "topologies": [
         "replicaset",
-        "sharded-replicaset"
+        "sharded"
       ]
     }
   ],
@@ -21,7 +21,7 @@
       "client": {
         "id": "client",
         "uriOptions": {
-          "timeoutMS": 50
+          "timeoutMS": 500
         },
         "useMultipleMongoses": false,
         "observeEvents": [
@@ -81,6 +81,9 @@
                 }
               }
             ]
+          },
+          "expectError": {
+            "isClientError": true
           }
         }
       ],
@@ -109,7 +112,7 @@
                   "insert"
                 ],
                 "blockConnection": true,
-                "blockTimeMS": 30
+                "blockTimeMS": 300
               }
             }
           }
@@ -182,6 +185,21 @@
                   }
                 }
               }
+            },
+            {
+              "commandStartedEvent": {
+                "commandName": "abortTransaction",
+                "databaseName": "admin",
+                "command": {
+                  "abortTransaction": 1,
+                  "maxTimeMS": {
+                    "$$type": [
+                      "int",
+                      "long"
+                    ]
+                  }
+                }
+              }
             }
           ]
         }
diff --git a/test/csot/deprecated-options.json b/test/csot/deprecated-options.json
index 9c9b9a228..d3e4631ff 100644
--- a/test/csot/deprecated-options.json
+++ b/test/csot/deprecated-options.json
@@ -6,7 +6,7 @@
       "minServerVersion": "4.2",
       "topologies": [
         "replicaset",
-        "sharded-replicaset"
+        "sharded"
       ]
     }
   ],
diff --git a/test/csot/error-transformations.json b/test/csot/error-transformations.json
index 4d9e061c3..4889e3958 100644
--- a/test/csot/error-transformations.json
+++ b/test/csot/error-transformations.json
@@ -11,7 +11,6 @@
     {
       "minServerVersion": "4.2",
       "topologies": [
-        "replicaset",
         "sharded"
       ]
     }
diff --git a/test/csot/global-timeoutMS.json b/test/csot/global-timeoutMS.json
index 34854ac15..740bbad2e 100644
--- a/test/csot/global-timeoutMS.json
+++ b/test/csot/global-timeoutMS.json
@@ -6,7 +6,7 @@
       "minServerVersion": "4.4",
       "topologies": [
         "replicaset",
-        "sharded-replicaset"
+        "sharded"
       ]
     }
   ],
diff --git a/test/csot/legacy-timeouts.json b/test/csot/legacy-timeouts.json
index 3a2d2eaef..535425c93 100644
--- a/test/csot/legacy-timeouts.json
+++ b/test/csot/legacy-timeouts.json
@@ -1,6 +1,6 @@
 {
   "description": "legacy timeouts continue to work if timeoutMS is not set",
-  "schemaVersion": "1.9",
+  "schemaVersion": "1.0",
   "runOnRequirements": [
     {
       "minServerVersion": "4.4"
@@ -280,7 +280,7 @@
         {
           "topologies": [
             "replicaset",
-            "sharded-replicaset"
+            "sharded"
           ]
         }
       ],
diff --git a/test/csot/non-tailable-cursors.json b/test/csot/non-tailable-cursors.json
index 0a5448a6b..291c6e72a 100644
--- a/test/csot/non-tailable-cursors.json
+++ b/test/csot/non-tailable-cursors.json
@@ -17,7 +17,7 @@
       "client": {
         "id": "client",
         "uriOptions": {
-          "timeoutMS": 10
+          "timeoutMS": 200
         },
         "useMultipleMongoses": false,
         "observeEvents": [
@@ -84,7 +84,7 @@
                   "find"
                 ],
                 "blockConnection": true,
-                "blockTimeMS": 15
+                "blockTimeMS": 250
               }
             }
           }
@@ -143,7 +143,7 @@
                   "getMore"
                 ],
                 "blockConnection": true,
-                "blockTimeMS": 15
+                "blockTimeMS": 125
               }
             }
           }
@@ -153,7 +153,7 @@
           "object": "collection",
           "arguments": {
             "filter": {},
-            "timeoutMS": 20,
+            "timeoutMS": 200,
             "batchSize": 2
           },
           "expectError": {
@@ -221,7 +221,7 @@
                   "getMore"
                 ],
                 "blockConnection": true,
-                "blockTimeMS": 15
+                "blockTimeMS": 150
               }
             }
           }
@@ -232,7 +232,7 @@
           "arguments": {
             "filter": {},
             "timeoutMode": "cursorLifetime",
-            "timeoutMS": 20,
+            "timeoutMS": 200,
             "batchSize": 2
           },
           "expectError": {
@@ -299,7 +299,7 @@
                   "find"
                 ],
                 "blockConnection": true,
-                "blockTimeMS": 15
+                "blockTimeMS": 250
               }
             }
           }
@@ -355,7 +355,7 @@
                   "getMore"
                 ],
                 "blockConnection": true,
-                "blockTimeMS": 15
+                "blockTimeMS": 125
               }
             }
           }
@@ -366,7 +366,7 @@
           "arguments": {
             "filter": {},
             "timeoutMode": "iteration",
-            "timeoutMS": 20,
+            "timeoutMS": 200,
             "batchSize": 2
           }
         }
@@ -427,7 +427,7 @@
                   "getMore"
                 ],
                 "blockConnection": true,
-                "blockTimeMS": 15
+                "blockTimeMS": 250
               }
             }
           }
diff --git a/test/csot/override-operation-timeoutMS.json b/test/csot/override-operation-timeoutMS.json
index 896b996ee..6fa0bd802 100644
--- a/test/csot/override-operation-timeoutMS.json
+++ b/test/csot/override-operation-timeoutMS.json
@@ -6,7 +6,7 @@
       "minServerVersion": "4.4",
       "topologies": [
         "replicaset",
-        "sharded-replicaset"
+        "sharded"
       ]
     }
   ],
diff --git a/test/csot/retryability-legacy-timeouts.json b/test/csot/retryability-legacy-timeouts.json
index 63e8efccf..aded781ae 100644
--- a/test/csot/retryability-legacy-timeouts.json
+++ b/test/csot/retryability-legacy-timeouts.json
@@ -6,7 +6,7 @@
       "minServerVersion": "4.4",
       "topologies": [
         "replicaset",
-        "sharded-replicaset"
+        "sharded"
       ]
     }
   ],
diff --git a/test/csot/sessions-inherit-timeoutMS.json b/test/csot/sessions-inherit-timeoutMS.json
index 8205c086b..13ea91c79 100644
--- a/test/csot/sessions-inherit-timeoutMS.json
+++ b/test/csot/sessions-inherit-timeoutMS.json
@@ -6,7 +6,7 @@
       "minServerVersion": "4.4",
       "topologies": [
         "replicaset",
-        "sharded-replicaset"
+        "sharded"
       ]
     }
   ],
@@ -21,7 +21,7 @@
       "client": {
         "id": "client",
         "uriOptions": {
-          "timeoutMS": 50
+          "timeoutMS": 500
         },
         "useMultipleMongoses": false,
         "observeEvents": [
@@ -78,7 +78,7 @@
                   "commitTransaction"
                 ],
                 "blockConnection": true,
-                "blockTimeMS": 60
+                "blockTimeMS": 600
               }
             }
           }
@@ -165,7 +165,7 @@
                   "abortTransaction"
                 ],
                 "blockConnection": true,
-                "blockTimeMS": 60
+                "blockTimeMS": 600
               }
             }
           }
@@ -249,7 +249,7 @@
                   "insert"
                 ],
                 "blockConnection": true,
-                "blockTimeMS": 60
+                "blockTimeMS": 600
               }
             }
           }
@@ -302,6 +302,26 @@
               "commandFailedEvent": {
                 "commandName": "insert"
               }
+            },
+            {
+              "commandStartedEvent": {
+                "commandName": "abortTransaction",
+                "databaseName": "admin",
+                "command": {
+                  "abortTransaction": 1,
+                  "maxTimeMS": {
+                    "$$type": [
+                      "int",
+                      "long"
+                    ]
+                  }
+                }
+              }
+            },
+            {
+              "commandFailedEvent": {
+                "commandName": "abortTransaction"
+              }
             }
           ]
         }
diff --git a/test/csot/sessions-override-operation-timeoutMS.json b/test/csot/sessions-override-operation-timeoutMS.json
index ff26de29f..441c69832 100644
--- a/test/csot/sessions-override-operation-timeoutMS.json
+++ b/test/csot/sessions-override-operation-timeoutMS.json
@@ -6,7 +6,7 @@
       "minServerVersion": "4.4",
       "topologies": [
         "replicaset",
-        "sharded-replicaset"
+        "sharded"
       ]
     }
   ],
@@ -75,7 +75,7 @@
                   "commitTransaction"
                 ],
                 "blockConnection": true,
-                "blockTimeMS": 60
+                "blockTimeMS": 600
               }
             }
           }
@@ -98,7 +98,7 @@
           "name": "commitTransaction",
           "object": "session",
           "arguments": {
-            "timeoutMS": 50
+            "timeoutMS": 500
           },
           "expectError": {
             "isTimeoutError": true
@@ -165,7 +165,7 @@
                   "abortTransaction"
                 ],
                 "blockConnection": true,
-                "blockTimeMS": 60
+                "blockTimeMS": 600
               }
             }
           }
@@ -188,7 +188,7 @@
           "name": "abortTransaction",
           "object": "session",
           "arguments": {
-            "timeoutMS": 50
+            "timeoutMS": 500
           }
         }
       ],
@@ -252,7 +252,7 @@
                   "insert"
                 ],
                 "blockConnection": true,
-                "blockTimeMS": 60
+                "blockTimeMS": 600
               }
             }
           }
@@ -261,7 +261,7 @@
           "name": "withTransaction",
           "object": "session",
           "arguments": {
-            "timeoutMS": 50,
+            "timeoutMS": 500,
             "callback": [
               {
                 "name": "insertOne",
@@ -306,6 +306,26 @@
               "commandFailedEvent": {
                 "commandName": "insert"
               }
+            },
+            {
+              "commandStartedEvent": {
+                "commandName": "abortTransaction",
+                "databaseName": "admin",
+                "command": {
+                  "abortTransaction": 1,
+                  "maxTimeMS": {
+                    "$$type": [
+                      "int",
+                      "long"
+                    ]
+                  }
+                }
+              }
+            },
+            {
+              "commandFailedEvent": {
+                "commandName": "abortTransaction"
+              }
             }
           ]
         }
diff --git a/test/csot/sessions-override-timeoutMS.json b/test/csot/sessions-override-timeoutMS.json
index 1d3b8932a..d90152e90 100644
--- a/test/csot/sessions-override-timeoutMS.json
+++ b/test/csot/sessions-override-timeoutMS.json
@@ -6,7 +6,7 @@
       "minServerVersion": "4.4",
       "topologies": [
         "replicaset",
-        "sharded-replicaset"
+        "sharded"
       ]
     }
   ],
@@ -47,7 +47,7 @@
         "id": "session",
         "client": "client",
         "sessionOptions": {
-          "defaultTimeoutMS": 50
+          "defaultTimeoutMS": 500
         }
       }
     }
@@ -78,7 +78,7 @@
                   "commitTransaction"
                 ],
                 "blockConnection": true,
-                "blockTimeMS": 60
+                "blockTimeMS": 600
               }
             }
           }
@@ -165,7 +165,7 @@
                   "abortTransaction"
                 ],
                 "blockConnection": true,
-                "blockTimeMS": 60
+                "blockTimeMS": 600
               }
             }
           }
@@ -249,7 +249,7 @@
                   "insert"
                 ],
                 "blockConnection": true,
-                "blockTimeMS": 60
+                "blockTimeMS": 600
               }
             }
           }
@@ -302,6 +302,26 @@
               "commandFailedEvent": {
                 "commandName": "insert"
               }
+            },
+            {
+              "commandStartedEvent": {
+                "commandName": "abortTransaction",
+                "databaseName": "admin",
+                "command": {
+                  "abortTransaction": 1,
+                  "maxTimeMS": {
+                    "$$type": [
+                      "int",
+                      "long"
+                    ]
+                  }
+                }
+              }
+            },
+            {
+              "commandFailedEvent": {
+                "commandName": "abortTransaction"
+              }
             }
           ]
         }
diff --git a/test/csot/tailable-awaitData.json b/test/csot/tailable-awaitData.json
index 6da85c778..535fb6924 100644
--- a/test/csot/tailable-awaitData.json
+++ b/test/csot/tailable-awaitData.json
@@ -17,7 +17,7 @@
       "client": {
         "id": "client",
         "uriOptions": {
-          "timeoutMS": 10
+          "timeoutMS": 200
         },
         "useMultipleMongoses": false,
         "observeEvents": [
@@ -130,7 +130,7 @@
                   "find"
                 ],
                 "blockConnection": true,
-                "blockTimeMS": 15
+                "blockTimeMS": 300
               }
             }
           }
@@ -188,7 +188,7 @@
                   "getMore"
                 ],
                 "blockConnection": true,
-                "blockTimeMS": 15
+                "blockTimeMS": 150
               }
             }
           }
@@ -199,7 +199,7 @@
           "arguments": {
             "filter": {},
             "cursorType": "tailableAwait",
-            "timeoutMS": 20,
+            "timeoutMS": 250,
             "batchSize": 1
           },
           "saveResultAsEntity": "tailableCursor"
@@ -272,7 +272,7 @@
                   "getMore"
                 ],
                 "blockConnection": true,
-                "blockTimeMS": 15
+                "blockTimeMS": 150
               }
             }
           }
@@ -283,7 +283,7 @@
           "arguments": {
             "filter": {},
             "cursorType": "tailableAwait",
-            "timeoutMS": 20,
+            "timeoutMS": 250,
             "batchSize": 1,
             "maxAwaitTimeMS": 1
           },
@@ -354,7 +354,7 @@
                   "getMore"
                 ],
                 "blockConnection": true,
-                "blockTimeMS": 15
+                "blockTimeMS": 250
               }
             }
           }
diff --git a/test/csot/tailable-non-awaitData.json b/test/csot/tailable-non-awaitData.json
index 34ee66096..e88230e4f 100644
--- a/test/csot/tailable-non-awaitData.json
+++ b/test/csot/tailable-non-awaitData.json
@@ -17,7 +17,7 @@
       "client": {
         "id": "client",
         "uriOptions": {
-          "timeoutMS": 10
+          "timeoutMS": 200
         },
         "useMultipleMongoses": false,
         "observeEvents": [
@@ -94,7 +94,7 @@
                   "find"
                 ],
                 "blockConnection": true,
-                "blockTimeMS": 15
+                "blockTimeMS": 250
               }
             }
           }
@@ -154,7 +154,7 @@
                   "getMore"
                 ],
                 "blockConnection": true,
-                "blockTimeMS": 15
+                "blockTimeMS": 150
               }
             }
           }
@@ -165,7 +165,7 @@
           "arguments": {
             "filter": {},
             "cursorType": "tailable",
-            "timeoutMS": 20,
+            "timeoutMS": 200,
             "batchSize": 1
           },
           "saveResultAsEntity": "tailableCursor"
@@ -239,7 +239,7 @@
                   "getMore"
                 ],
                 "blockConnection": true,
-                "blockTimeMS": 15
+                "blockTimeMS": 250
               }
             }
           }
diff --git a/test/discovery_and_monitoring/unified/hello-command-error.json b/test/discovery_and_monitoring/unified/hello-command-error.json
index 9afea87e7..87958cb2c 100644
--- a/test/discovery_and_monitoring/unified/hello-command-error.json
+++ b/test/discovery_and_monitoring/unified/hello-command-error.json
@@ -3,7 +3,7 @@
   "schemaVersion": "1.4",
   "runOnRequirements": [
     {
-      "minServerVersion": "4.9",
+      "minServerVersion": "4.4.7",
       "serverless": "forbid",
       "topologies": [
         "single",
diff --git a/test/discovery_and_monitoring/unified/hello-network-error.json b/test/discovery_and_monitoring/unified/hello-network-error.json
index 55373c90c..15ed2b605 100644
--- a/test/discovery_and_monitoring/unified/hello-network-error.json
+++ b/test/discovery_and_monitoring/unified/hello-network-error.json
@@ -3,7 +3,7 @@
   "schemaVersion": "1.4",
   "runOnRequirements": [
     {
-      "minServerVersion": "4.9",
+      "minServerVersion": "4.4.7",
       "serverless": "forbid",
       "topologies": [
         "single",
diff --git a/test/discovery_and_monitoring/unified/interruptInUse-pool-clear.json b/test/discovery_and_monitoring/unified/interruptInUse-pool-clear.json
index a20d79030..d9329646d 100644
--- a/test/discovery_and_monitoring/unified/interruptInUse-pool-clear.json
+++ b/test/discovery_and_monitoring/unified/interruptInUse-pool-clear.json
@@ -3,7 +3,7 @@
   "schemaVersion": "1.11",
   "runOnRequirements": [
     {
-      "minServerVersion": "4.9",
+      "minServerVersion": "4.4",
       "serverless": "forbid",
       "topologies": [
         "replicaset",
diff --git a/test/discovery_and_monitoring/unified/minPoolSize-error.json b/test/discovery_and_monitoring/unified/minPoolSize-error.json
index 7e294baf6..bd9e9fcde 100644
--- a/test/discovery_and_monitoring/unified/minPoolSize-error.json
+++ b/test/discovery_and_monitoring/unified/minPoolSize-error.json
@@ -3,7 +3,7 @@
   "schemaVersion": "1.4",
   "runOnRequirements": [
     {
-      "minServerVersion": "4.9",
+      "minServerVersion": "4.4.7",
       "serverless": "forbid",
       "topologies": [
         "single"
diff --git a/test/load_balancer/cursors.json b/test/load_balancer/cursors.json
index e66c46c0c..27aaddd5b 100644
--- a/test/load_balancer/cursors.json
+++ b/test/load_balancer/cursors.json
@@ -1,6 +1,6 @@
 {
   "description": "cursors are correctly pinned to connections for load-balanced clusters",
-  "schemaVersion": "1.3",
+  "schemaVersion": "1.4",
   "runOnRequirements": [
     {
       "topologies": [
@@ -222,7 +222,10 @@
                 "reply": {
                   "cursor": {
                     "id": {
-                      "$$type": "long"
+                      "$$type": [
+                        "int",
+                        "long"
+                      ]
                     },
                     "firstBatch": {
                       "$$type": "array"
@@ -239,7 +242,10 @@
               "commandStartedEvent": {
                 "command": {
                   "getMore": {
-                    "$$type": "long"
+                    "$$type": [
+                      "int",
+                      "long"
+                    ]
                   },
                   "collection": "coll0"
                 },
@@ -333,7 +339,10 @@
                 "reply": {
                   "cursor": {
                     "id": {
-                      "$$type": "long"
+                      "$$type": [
+                        "int",
+                        "long"
+                      ]
                     },
                     "firstBatch": {
                       "$$type": "array"
@@ -475,7 +484,10 @@
                 "reply": {
                   "cursor": {
                     "id": {
-                      "$$type": "long"
+                      "$$type": [
+                        "int",
+                        "long"
+                      ]
                     },
                     "firstBatch": {
                       "$$type": "array"
@@ -492,7 +504,10 @@
               "commandStartedEvent": {
                 "command": {
                   "getMore": {
-                    "$$type": "long"
+                    "$$type": [
+                      "int",
+                      "long"
+                    ]
                   },
                   "collection": "coll0"
                 },
@@ -605,7 +620,10 @@
                 "reply": {
                   "cursor": {
                     "id": {
-                      "$$type": "long"
+                      "$$type": [
+                        "int",
+                        "long"
+                      ]
                     },
                     "firstBatch": {
                       "$$type": "array"
@@ -750,7 +768,10 @@
                 "reply": {
                   "cursor": {
                     "id": {
-                      "$$type": "long"
+                      "$$type": [
+                        "int",
+                        "long"
+                      ]
                     },
                     "firstBatch": {
                       "$$type": "array"
@@ -767,7 +788,10 @@
               "commandStartedEvent": {
                 "command": {
                   "getMore": {
-                    "$$type": "long"
+                    "$$type": [
+                      "int",
+                      "long"
+                    ]
                   },
                   "collection": "coll0"
                 },
@@ -858,7 +882,10 @@
               "commandStartedEvent": {
                 "command": {
                   "getMore": {
-                    "$$type": "long"
+                    "$$type": [
+                      "int",
+                      "long"
+                    ]
                   },
                   "collection": "coll0"
                 },
@@ -950,7 +977,10 @@
               "commandStartedEvent": {
                 "command": {
                   "getMore": {
-                    "$$type": "long"
+                    "$$type": [
+                      "int",
+                      "long"
+                    ]
                   },
                   "collection": {
                     "$$type": "string"
@@ -1100,7 +1130,10 @@
               "commandStartedEvent": {
                 "command": {
                   "getMore": {
-                    "$$type": "long"
+                    "$$type": [
+                      "int",
+                      "long"
+                    ]
                   },
                   "collection": "coll0"
                 },
diff --git a/test/load_balancer/sdam-error-handling.json b/test/load_balancer/sdam-error-handling.json
index 8760b723f..5892dcacd 100644
--- a/test/load_balancer/sdam-error-handling.json
+++ b/test/load_balancer/sdam-error-handling.json
@@ -1,6 +1,6 @@
 {
   "description": "state change errors are correctly handled",
-  "schemaVersion": "1.3",
+  "schemaVersion": "1.4",
   "runOnRequirements": [
     {
       "topologies": [
@@ -263,7 +263,7 @@
       "description": "errors during the initial connection hello are ignored",
       "runOnRequirements": [
         {
-          "minServerVersion": "4.9"
+          "minServerVersion": "4.4.7"
         }
       ],
       "operations": [
@@ -279,7 +279,6 @@
               },
               "data": {
                 "failCommands": [
-                  "ismaster",
                   "isMaster",
                   "hello"
                 ],
diff --git a/test/load_balancer/transactions.json b/test/load_balancer/transactions.json
index 8cf24f4ca..0dd04ee85 100644
--- a/test/load_balancer/transactions.json
+++ b/test/load_balancer/transactions.json
@@ -1,6 +1,6 @@
 {
   "description": "transactions are correctly pinned to connections for load-balanced clusters",
-  "schemaVersion": "1.3",
+  "schemaVersion": "1.4",
   "runOnRequirements": [
     {
       "topologies": [
diff --git a/test/test_pooling.py b/test/test_pooling.py
index cd8a61735..31259d7b3 100644
--- a/test/test_pooling.py
+++ b/test/test_pooling.py
@@ -413,7 +413,7 @@ class TestPooling(_TestPoolingBase):
         # maxConnecting = unbounded: 30+ connections in ~0.140+ seconds
         print(len(pool.conns))
 
-    @client_context.require_failCommand_fail_point
+    @client_context.require_failCommand_appName
     def test_csot_timeout_message(self):
         client = rs_or_single_client(appName="connectionTimeoutApp")
         self.addCleanup(client.close)
@@ -438,7 +438,7 @@ class TestPooling(_TestPoolingBase):
 
         self.assertTrue("(configured timeouts: timeoutMS: 500.0ms" in str(error.exception))
 
-    @client_context.require_failCommand_fail_point
+    @client_context.require_failCommand_appName
     def test_socket_timeout_message(self):
         client = rs_or_single_client(socketTimeoutMS=500, appName="connectionTimeoutApp")
         self.addCleanup(client.close)
@@ -465,10 +465,7 @@ class TestPooling(_TestPoolingBase):
             in str(error.exception)
         )
 
-    @client_context.require_failCommand_fail_point
-    @client_context.require_version_min(
-        4, 9, 0
-    )  # configureFailPoint does not allow failure on handshake before 4.9, fixed in SERVER-49336
+    @client_context.require_failCommand_appName
     def test_connection_timeout_message(self):
         # Mock a connection creation failing due to timeout.
         mock_connection_timeout = {
diff --git a/test/test_streaming_protocol.py b/test/test_streaming_protocol.py
index 44e673822..9bca899a4 100644
--- a/test/test_streaming_protocol.py
+++ b/test/test_streaming_protocol.py
@@ -141,7 +141,6 @@ class TestStreamingProtocol(IntegrationTest):
         self.assertEqual(1, len(events))
         self.assertGreater(events[0].new_description.round_trip_time, 0)
 
-    @client_context.require_version_min(4, 9, -1)
     @client_context.require_failCommand_appName
     def test_monitor_waits_after_server_check_error(self):
         # This test implements: