diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index ff030ac5..07b131fa 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -11,7 +11,7 @@ jobs:
     strategy:
       matrix:
         erlang: [22, 23]
-        mongodb: ["4.4.8", "5.0.2"]
+        mongodb: ["4.4.8"]
     container:
       image: erlang:${{ matrix.erlang }}
     steps:
@@ -19,8 +19,8 @@ jobs:
       - run: ./scripts/install_mongo_debian.sh ${{ matrix.mongodb }}
       - run: ./scripts/start_mongo_single_node.sh
       - run: ./scripts/start_mongo_cluster.sh
-      - run: ./rebar3 eunit
-      - run: ./rebar3 ct
+      - run: ./rebar3 eunit --verbose
+      - run: ./rebar3 ct --verbose
       - name: Archive Replica Set Logs
         uses: actions/upload-artifact@v2
         if: failure()
diff --git a/.github/workflows/test_coverage.yml b/.github/workflows/test_coverage.yml
index 76ee41d0..919a35c8 100644
--- a/.github/workflows/test_coverage.yml
+++ b/.github/workflows/test_coverage.yml
@@ -15,9 +15,9 @@ jobs:
       - run: ./scripts/install_mongo_debian.sh 5.0.2
       - run: ./scripts/start_mongo_single_node.sh
       - run: ./scripts/start_mongo_cluster.sh
-      - run: ./rebar3 eunit --cover --cover_export_name eunit.coverdata
-      - run: ./rebar3 ct --cover --cover_export_name ct.coverdata
-      - run: rebar3 cover --verbose
+      - run: ./rebar3 eunit --verbose --cover --cover_export_name eunit
+      - run: ./rebar3 ct --verbose --cover --cover_export_name ct
+      - run: ./rebar3 cover --verbose
       - name: Archive Replica Set Logs
         uses: actions/upload-artifact@v2
         if: failure()
@@ -34,12 +34,14 @@ jobs:
           retention-days: 1
       - name: Coverage Report
         uses: actions/upload-artifact@v2
+        if: always()
         with:
           name: Coverage Report
           path: _build/test/cover/
           retention-days: 5
       - name: CT Logs
         uses: actions/upload-artifact@v2
+        if: always()
         with:
           name: ct_logs
           path: _build/test/logs/
diff --git a/scripts/start_mongo_cluster.sh b/scripts/start_mongo_cluster.sh
index c23b1d6e..2fb9164b 100755
--- a/scripts/start_mongo_cluster.sh
+++ b/scripts/start_mongo_cluster.sh
@@ -4,6 +4,19 @@
 
 set -ex
 
+mongo --port 27018 admin --eval 'db.adminCommand({
+  shutdown: 1,
+  force: true
+})' || true
+mongo --port 27019 admin --eval 'db.adminCommand({
+  shutdown: 1,
+  force: true
+})' || true
+mongo --port 27020 admin --eval 'db.adminCommand({
+  shutdown: 1,
+  force: true
+})' || true
+
 rm   -rf rs0-0 rs0-1 rs0-2 rs0-logs rs0-key
 mkdir -p rs0-0 rs0-1 rs0-2 rs0-logs rs0-key
 
@@ -44,13 +57,26 @@ mongo --host rs0/localhost:27018,localhost:27019,localhost:27020 \
                  pwd: "rs_test",
                  roles: [{role: "clusterAdmin", db: "admin"},
                          {role: "userAdminAnyDatabase", db: "admin"},
+                         {role: "readWriteAnyDatabase", db: "admin"},
                          "readWrite"]})'
 
 # Shutdown nodes in replica set
-mongod --shutdown --dbpath rs0-0
-mongod --shutdown --dbpath rs0-1
-mongod --shutdown --dbpath rs0-2
-
+mongo --port 27018 admin --eval 'db.adminCommand({
+  shutdown: 1,
+  force: true
+})' || true
+mongo --port 27019 admin --eval 'db.adminCommand({
+  shutdown: 1,
+  force: true
+})' || true
+mongo --port 27020 admin --eval 'db.adminCommand({
+  shutdown: 1,
+  force: true
+})' || true
+#mongod --shutdown --dbpath rs0-0
+#mongod --shutdown --dbpath rs0-1
+#mongod --shutdown --dbpath rs0-2
+sleep 10
 # Restart replica set nodes with authentication enabled
 mongod --replSet rs0 --auth --keyFile rs0-key/key --port 27018 --bind_ip localhost --dbpath rs0-0 --oplogSize 128 >> rs0-logs/rs0-0-auth.log.txt &
 mongod --replSet rs0 --auth --keyFile rs0-key/key --port 27019 --bind_ip localhost --dbpath rs0-1 --oplogSize 128 >> rs0-logs/rs0-1-auth.log.txt &
@@ -63,9 +89,10 @@ timeout 5m sh -c 'until nc -z localhost 27019; do sleep 1; done'
 echo "Waiting on MongoDB to restart on 27020"
 timeout 5m sh -c 'until nc -z localhost 27020; do sleep 1; done'
 
+# mongodb://rs_user:rs_test@localhost:27018,localhost:27019,localhost:27020/?authSource=admin&replicaSet=rs0
 # Verify that we can auth to the restarted replica set
 mongo --host rs0/localhost:27018,localhost:27019,localhost:27020 \
       --username rs_user \
       --password rs_test \
       --authenticationDatabase admin \
-      --eval 'db.serverStatus()' > /dev/null
+      --eval 'db.serverStatus()'
diff --git a/test/replica_set_SUITE.erl b/test/replica_set_SUITE.erl
new file mode 100644
index 00000000..a622eaf5
--- /dev/null
+++ b/test/replica_set_SUITE.erl
@@ -0,0 +1,93 @@
+-module(replica_set_SUITE).
+
+%% API
+-export([]).
+
+-include_lib("common_test/include/ct.hrl").
+-include_lib("eunit/include/eunit.hrl").
+
+-include("mongo_protocol.hrl").
+
+-compile(export_all).
+
+all() ->
+  [todo_test, rp_mode_test].
+
+init_per_suite(Config) ->
+  application:ensure_all_started(mongodb),
+  [{seed,
+    {rs, <<"rs0">>, [<<"localhost:27018">>, <<"localhost:27019">>, <<"localhost:27020">>]}},
+   {user, <<"rs_user">>},
+   {password, <<"rs_test">>},
+   {collection, <<"test">>}]
+  ++ Config.
+
+end_per_suite(_Config) ->
+  ok.
+
+init_per_testcase(_Case, Config) ->
+  case mongoc_connect(Config) of
+    {ok, Topology} ->
+      [{topology, Topology}] ++ Config;
+    {error, _} ->
+      {skipped, cannot_connect_rs_cluster}
+  end.
+
+end_per_testcase(_Case, Config) ->
+  mongoc:disconnect(?config(topology, Config)),
+  ok.
+
+%% Tests
+todo_test(Config) ->
+  Topology = ?config(topology, Config),
+  State = mc_topology:get_state(Topology),
+  ct:pal("State: ~p", [State]),
+  Status = mongoc:status(Topology),
+  ct:pal("Status: ~p", [Status]),
+  PrimaryPool = mc_topology:get_pool(Topology, #{rp_mode => primary}),
+  ct:pal("PrimaryPool: ~p", [PrimaryPool]),
+  SecondaryPool = mc_topology:get_pool(Topology, #{rp_mode => secondary}),
+  ct:pal("SecondaryPool: ~p", [SecondaryPool]),
+  Config.
+
+rp_mode_test(Config) ->
+  {rs, _, Hosts} = ?config(seed, Config),
+  HostsAndPorts = [binary:split(Host, <<":">>) || Host <- Hosts],
+  BaseConnectArgs = [{login, ?config(user, Config)}, {password, ?config(password, Config)}],
+  TaggedPorts =
+    lists:map(fun([_, Port]) ->
+                 ConnectArgs = [{port, binary_to_integer(Port)}] ++ BaseConnectArgs,
+                 {ok, Connection} = mc_worker_api:connect(ConnectArgs),
+                 {true, #{<<"ismaster">> := IsPrimary}} =
+                   mc_worker_api:command(Connection, {isMaster, 1}),
+                 mc_worker_api:disconnect(Connection),
+                 {binary_to_integer(Port), IsPrimary}
+              end,
+              HostsAndPorts),
+  [{PrimaryPort, true}] =
+    lists:filter(fun({_Port, IsPrimary}) -> IsPrimary end, TaggedPorts),
+  ct:pal("PrimaryPort ~p", [PrimaryPort]),
+  SPL = lists:subtract(TaggedPorts, [{PrimaryPort, true}]),
+  [SecondaryPort | _] = [Port || {Port, _} <- SPL],
+  ct:pal("SecondaryPort ~p", [SecondaryPort]),
+  {ok, PrimaryConn} = mc_worker_api:connect([{port, PrimaryPort}] ++ BaseConnectArgs),
+  InsertResult =
+    mc_worker_api:insert(PrimaryConn,
+                         ?config(collection, Config),
+                         #{<<"foo">> => <<"bar">>, <<"a">> => <<"b">>}),
+  ct:pal("InsertResult ~p", [InsertResult]),
+  {ok, SecondaryConn} = mc_worker_api:connect([{port, SecondaryPort}, { {r_mode, slave_ok}}] ++ BaseConnectArgs),
+  FindOneResult =
+    mc_worker_api:find_one(SecondaryConn,
+                           ?config(collection, Config),
+                           #{<<"foo">> => <<"bar">>}),
+  ct:pal("FindOneResult ~p", [FindOneResult]),
+  ok.
+
+%% Private
+mongoc_connect(Config) ->
+  mongoc:connect(?config(seed, Config),
+                 [{rp_mode, secondaryPreferred}],
+                 [{database, ?config(collection, Config)},
+                  {login, ?config(user, Config)},
+                  {password, ?config(password, Config)}]).