diff --git a/.evergreen/config.yml b/.evergreen/config.yml
index 964dfa362f..24ff0ee361 100644
--- a/.evergreen/config.yml
+++ b/.evergreen/config.yml
@@ -291,6 +291,7 @@ functions:
             DISABLE_TEST_COMMANDS=${DISABLE_TEST_COMMANDS} \
             ORCHESTRATION_FILE=${ORCHESTRATION_FILE} \
             REQUIRE_API_VERSION=${REQUIRE_API_VERSION} \
+            LOAD_BALANCER=${LOAD_BALANCER} \
             bash ${DRIVERS_TOOLS}/.evergreen/run-orchestration.sh
     # run-orchestration generates expansion file with the MONGODB_URI for the cluster
     - command: expansions.update
@@ -1798,6 +1799,7 @@ tasks:
         - func: "bootstrap mongo-orchestration"
           vars:
             TOPOLOGY: "sharded_cluster"
+            LOAD_BALANCER: true
         - func: "run load-balancer"
         - func: "run tests"
 # }}}
@@ -2023,6 +2025,10 @@ axes:
         display_name: "MongoDB 5.0"
         variables:
           VERSION: "5.0"
+      - id: "rapid"
+        display_name: "MongoDB rapid"
+        variables:
+          VERSION: "rapid"
 
   # Choice of Python runtime version
   - id: python-version
@@ -2986,7 +2992,7 @@ buildvariants:
 - matrix_name: "load-balancer"
   matrix_spec:
     platform: awslinux
-    mongodb-version: ["5.0", "latest"]
+    mongodb-version: ["rapid", "latest"]
     auth-ssl: "*"
     python-version: ["2.7", "3.5", "3.6", "3.7", "3.8", "3.9", "pypy", "pypy3.5", "pypy3.7"]
     loadbalancer: "*"
diff --git a/pymongo/pool.py b/pymongo/pool.py
index ff7459747e..758a8a54a5 100644
--- a/pymongo/pool.py
+++ b/pymongo/pool.py
@@ -242,9 +242,6 @@ def _set_keepalive_times(sock):
 # main thread, to avoid the deadlock. See PYTHON-607.
 u"foo".encode("idna")
 
-# Remove after PYTHON-2712
-_MOCK_SERVICE_ID = False
-
 
 def _raise_connection_failure(address, error, msg_prefix=None):
     """Convert a socket.error to ConnectionFailure and raise it."""
@@ -619,12 +616,6 @@ def _hello(self, cluster_time, topology_version, heartbeat_frequency, all_creden
             cmd["speculativeAuthenticate"] = auth_ctx.speculate_command()
 
         doc = self.command("admin", cmd, publish_events=False, exhaust_allowed=awaitable)
-        # PYTHON-2712 will remove this topologyVersion fallback logic.
-        if self.opts.load_balanced and _MOCK_SERVICE_ID:
-            process_id = doc.get("topologyVersion", {}).get("processId")
-            doc.setdefault("serviceId", process_id)
-        if not self.opts.load_balanced:
-            doc.pop("serviceId", None)
         hello = IsMaster(doc, awaitable=awaitable)
         self.is_writable = hello.is_writable
         self.max_wire_version = hello.max_wire_version
@@ -661,9 +652,6 @@ def _next_reply(self):
         unpacked_docs = reply.unpack_response()
         response_doc = unpacked_docs[0]
         helpers._check_command_response(response_doc, self.max_wire_version)
-        # Remove after PYTHON-2712.
-        if not self.opts.load_balanced:
-            response_doc.pop("serviceId", None)
         return response_doc
 
     def command(
diff --git a/test/__init__.py b/test/__init__.py
index 2b2f426215..16171eb670 100644
--- a/test/__init__.py
+++ b/test/__init__.py
@@ -98,11 +98,7 @@
 SINGLE_MONGOS_LB_URI = os.environ.get("SINGLE_MONGOS_LB_URI")
 MULTI_MONGOS_LB_URI = os.environ.get("MULTI_MONGOS_LB_URI")
 if TEST_LOADBALANCER:
-    # Remove after PYTHON-2712
-    from pymongo import pool
-
-    pool._MOCK_SERVICE_ID = True
-    res = parse_uri(SINGLE_MONGOS_LB_URI)
+    res = parse_uri(SINGLE_MONGOS_LB_URI or "")
     host, port = res["nodelist"][0]
     db_user = res["username"] or db_user
     db_pwd = res["password"] or db_pwd