diff --git a/helio b/helio
index 8d0f0cc37908..0c0afcbc85a5 160000
--- a/helio
+++ b/helio
@@ -1 +1 @@
-Subproject commit 8d0f0cc37908623705125128d3c64d35d410fb0f
+Subproject commit 0c0afcbc85a5ac3347b07a76bb06c0fc98d0fc79
diff --git a/src/facade/dragonfly_connection.cc b/src/facade/dragonfly_connection.cc
index bdf1684d5ddd..5da7f3f0d510 100644
--- a/src/facade/dragonfly_connection.cc
+++ b/src/facade/dragonfly_connection.cc
@@ -17,6 +17,7 @@
 #include "facade/redis_parser.h"
 #include "facade/service_interface.h"
 #include "util/fiber_sched_algo.h"
+#include "util/fibers/fiber.h"
 
 #ifdef DFLY_USE_SSL
 #include "util/tls/tls_socket.h"
@@ -29,7 +30,7 @@ ABSL_FLAG(bool, http_admin_console, true, "If true allows accessing http console
 using namespace util;
 using namespace std;
 using nonstd::make_unexpected;
-namespace this_fiber = boost::this_fiber;
+
 namespace fibers = boost::fibers;
 
 namespace facade {
@@ -267,7 +268,7 @@ void Connection::UnregisterShutdownHook(ShutdownHandle id) {
 }
 
 void Connection::HandleRequests() {
-  this_fiber::properties<FiberProps>().set_name("DflyConnection");
+  FiberProps::SetName("DflyConnection");
 
   LinuxSocketBase* lsb = static_cast<LinuxSocketBase*>(socket_.get());
 
@@ -508,7 +509,7 @@ auto Connection::ParseRedis() -> ParserStatus {
         if (dispatch_q_.size() == 1) {
           evc_.notify();
         } else if (dispatch_q_.size() > 10) {
-          this_fiber::yield();
+          fibers_ext::Yield();
         }
       }
     }
@@ -715,7 +716,7 @@ void Connection::DispatchOperations::operator()(Request::PipelineMsg& msg) {
 // InputLoop. Note: in some cases, InputLoop may decide to dispatch directly and bypass the
 // DispatchFiber.
 void Connection::DispatchFiber(util::FiberSocketBase* peer) {
-  this_fiber::properties<FiberProps>().set_name("DispatchFiber");
+  FiberProps::SetName("DispatchFiber");
 
   SinkReplyBuilder* builder = cc_->reply_builder();
   DispatchOperations dispatch_op{builder, this};
diff --git a/src/server/debugcmd.cc b/src/server/debugcmd.cc
index 2bbe2a5166ae..d7be503867c3 100644
--- a/src/server/debugcmd.cc
+++ b/src/server/debugcmd.cc
@@ -21,6 +21,7 @@
 #include "server/string_family.h"
 #include "server/transaction.h"
 #include "util/fiber_sched_algo.h"
+#include "util/fibers/fiber.h"
 
 using namespace std;
 
@@ -30,7 +31,6 @@ ABSL_DECLARE_FLAG(string, dbfilename);
 namespace dfly {
 
 using namespace util;
-namespace this_fiber = ::boost::this_fiber;
 using boost::intrusive_ptr;
 using boost::fibers::fiber;
 using namespace facade;
@@ -275,7 +275,7 @@ void DebugCmd::Populate(CmdArgList args) {
   }
   ranges.emplace_back(from, total_count - from);
 
-  vector<fiber> fb_arr(ranges.size());
+  vector<fibers_ext::Fiber> fb_arr(ranges.size());
   for (size_t i = 0; i < ranges.size(); ++i) {
     auto range = ranges[i];
 
@@ -285,14 +285,14 @@ void DebugCmd::Populate(CmdArgList args) {
     });
   }
   for (auto& fb : fb_arr)
-    fb.join();
+    fb.Join();
 
   (*cntx_)->SendOk();
 }
 
 void DebugCmd::PopulateRangeFiber(uint64_t from, uint64_t len, std::string_view prefix,
                                   unsigned value_len, bool populate_random_values) {
-  this_fiber::properties<FiberProps>().set_name("populate_range");
+  FiberProps::SetName("populate_range");
   VLOG(1) << "PopulateRange: " << from << "-" << (from + len - 1);
 
   string key = absl::StrCat(prefix, ":");
@@ -313,7 +313,7 @@ void DebugCmd::PopulateRangeFiber(uint64_t from, uint64_t len, std::string_view
       ess.Add(sid, [=] {
         DoPopulateBatch(prefix, value_len, populate_random_values, params, shard_batch);
         if (i % 50 == 0) {
-          this_fiber::yield();
+          fibers_ext::Yield();
         }
       });
 
diff --git a/src/server/dragonfly_test.cc b/src/server/dragonfly_test.cc
index 2a4489f57fa4..d68fc95795d2 100644
--- a/src/server/dragonfly_test.cc
+++ b/src/server/dragonfly_test.cc
@@ -27,7 +27,6 @@ using absl::StrCat;
 using ::io::Result;
 using testing::ElementsAre;
 using testing::HasSubstr;
-namespace this_fiber = boost::this_fiber;
 
 namespace {
 
@@ -178,7 +177,7 @@ TEST_F(DflyEngineTest, MultiConsistent) {
   auto fb = pp_->at(1)->LaunchFiber([&] {
     RespExpr resp = Run({"multi"});
     ASSERT_EQ(resp, "OK");
-    this_fiber::sleep_for(1ms);
+    fibers_ext::SleepFor(1ms);
 
     resp = Run({"get", kKey1});
     ASSERT_EQ(resp, "QUEUED");
@@ -201,8 +200,8 @@ TEST_F(DflyEngineTest, MultiConsistent) {
     EXPECT_EQ(sub_arr[0].GetBuf(), resp_arr[0].GetBuf());
   });
 
-  mset_fb.join();
-  fb.join();
+  mset_fb.Join();
+  fb.Join();
   ASSERT_FALSE(service_->IsLocked(0, kKey1));
   ASSERT_FALSE(service_->IsLocked(0, kKey4));
   ASSERT_FALSE(service_->IsShardSetLocked());
@@ -271,8 +270,8 @@ TEST_F(DflyEngineTest, MultiHop) {
     }
   });
 
-  p1_fb.join();
-  p2_fb.join();
+  p1_fb.Join();
+  p2_fb.Join();
 }
 
 TEST_F(DflyEngineTest, FlushDb) {
@@ -294,7 +293,7 @@ TEST_F(DflyEngineTest, FlushDb) {
     }
   });
 
-  fb0.join();
+  fb0.Join();
 
   ASSERT_FALSE(service_->IsLocked(0, kKey1));
   ASSERT_FALSE(service_->IsLocked(0, kKey4));
@@ -472,12 +471,12 @@ TEST_F(DflyEngineTest, FlushAll) {
     for (size_t i = 1; i < 100; ++i) {
       RespExpr resp = Run({"set", "foo", "bar"});
       ASSERT_EQ(resp, "OK");
-      this_fiber::yield();
+      fibers_ext::Yield();
     }
   });
 
-  fb0.join();
-  fb1.join();
+  fb0.Join();
+  fb1.Join();
 }
 
 TEST_F(DflyEngineTest, OOM) {
@@ -791,7 +790,7 @@ TEST_F(DefragDflyEngineTest, TestDefragOption) {
   shard_set->pool()->AwaitFiberOnAll([&](unsigned index, ProactorBase* base) {
     EngineShard* shard = EngineShard::tlocal();
     ASSERT_FALSE(shard == nullptr);  // we only have one and its should not be empty!
-    this_fiber::sleep_for(100ms);
+    fibers_ext::SleepFor(100ms);
     EXPECT_EQ(shard->stats().defrag_realloc_total, 0);
     // we are expecting to have at least one try by now
     EXPECT_GT(shard->stats().defrag_task_invocation_total, 0);
@@ -814,7 +813,7 @@ TEST_F(DefragDflyEngineTest, TestDefragOption) {
       if (stats.defrag_realloc_total > 0) {
         break;
       }
-      this_fiber::sleep_for(220ms);
+      fibers_ext::SleepFor(220ms);
     }
     // make sure that we successfully found places to defrag in memory
     EXPECT_GT(stats.defrag_realloc_total, 0);
diff --git a/src/server/engine_shard_set.cc b/src/server/engine_shard_set.cc
index 9ec5fe6d536e..2c392841440a 100644
--- a/src/server/engine_shard_set.cc
+++ b/src/server/engine_shard_set.cc
@@ -45,7 +45,6 @@ ABSL_FLAG(float, mem_utilization_threshold, 0.8,
 namespace dfly {
 
 using namespace util;
-namespace this_fiber = ::boost::this_fiber;
 namespace fibers = ::boost::fibers;
 using absl::GetFlag;
 
@@ -179,7 +178,7 @@ EngineShard::EngineShard(util::ProactorBase* pb, bool update_db_time, mi_heap_t*
     : queue_(kQueueLen), txq_([](const Transaction* t) { return t->txid(); }), mi_resource_(heap),
       db_slice_(pb->GetIndex(), GetFlag(FLAGS_cache_mode), this) {
   fiber_q_ = fibers::fiber([this, index = pb->GetIndex()] {
-    this_fiber::properties<FiberProps>().set_name(absl::StrCat("shard_queue", index));
+    FiberProps::SetName(absl::StrCat("shard_queue", index));
     queue_.Run();
   });
 
diff --git a/src/server/generic_family_test.cc b/src/server/generic_family_test.cc
index e43d334bb280..f17b0596bce2 100644
--- a/src/server/generic_family_test.cc
+++ b/src/server/generic_family_test.cc
@@ -93,8 +93,8 @@ TEST_F(GenericFamilyTest, Del) {
     }
   });
 
-  exist_fb.join();
-  del_fb.join();
+  exist_fb.Join();
+  del_fb.Join();
 }
 
 TEST_F(GenericFamilyTest, TTL) {
@@ -160,8 +160,8 @@ TEST_F(GenericFamilyTest, Rename) {
     }
   });
 
-  exist_fb.join();
-  ren_fb.join();
+  exist_fb.Join();
+  ren_fb.Join();
 }
 
 TEST_F(GenericFamilyTest, RenameNonString) {
@@ -275,7 +275,7 @@ TEST_F(GenericFamilyTest, Move) {
     Run({"move", "l", "1"});
   });
 
-  fb_blpop.join();
+  fb_blpop.Join();
 }
 
 using testing::AnyOf;
diff --git a/src/server/io_mgr.cc b/src/server/io_mgr.cc
index 58ccfde5a378..67acf7724bb0 100644
--- a/src/server/io_mgr.cc
+++ b/src/server/io_mgr.cc
@@ -21,7 +21,6 @@ using namespace util;
 using namespace facade;
 using uring::FiberCall;
 using uring::Proactor;
-namespace this_fiber = ::boost::this_fiber;
 
 namespace {
 
@@ -137,7 +136,7 @@ error_code IoMgr::Read(size_t offset, io::MutableBytes dest) {
 
 void IoMgr::Shutdown() {
   while (flags_val) {
-    this_fiber::sleep_for(200us);  // TODO: hacky for now.
+    fibers_ext::SleepFor(200us);  // TODO: hacky for now.
   }
 }
 
diff --git a/src/server/list_family_test.cc b/src/server/list_family_test.cc
index 4e2896bc6b89..c0116733ab60 100644
--- a/src/server/list_family_test.cc
+++ b/src/server/list_family_test.cc
@@ -19,7 +19,6 @@
 using namespace testing;
 using namespace std;
 using namespace util;
-namespace this_fiber = ::boost::this_fiber;
 namespace fibers = ::boost::fibers;
 
 namespace dfly {
@@ -94,17 +93,17 @@ TEST_F(ListFamilyTest, BLPopBlocking) {
     LOG(INFO) << "pop0";
   });
 
-  this_fiber::sleep_for(50us);
+  fibers_ext::SleepFor(50us);
   auto fb1 = pp_->at(1)->LaunchFiber([&] {
     resp1 = Run({"blpop", "x", "0"});
     LOG(INFO) << "pop1";
   });
-  this_fiber::sleep_for(30us);
+  fibers_ext::SleepFor(30us);
 
   pp_->at(1)->Await([&] { Run("B1", {"lpush", "x", "2", "1"}); });
 
-  fb0.join();
-  fb1.join();
+  fb0.Join();
+  fb1.Join();
 
   // fb0 should start first and be the first transaction blocked. Therefore, it should pop '1'.
   // sometimes order is switched, need to think how to fix it.
@@ -131,7 +130,7 @@ TEST_F(ListFamilyTest, BLPopMultiple) {
   });
 
   pp_->at(1)->Await([&] { Run({"lpush", kKey1, "1", "2", "3"}); });
-  fb1.join();
+  fb1.Join();
 
   ASSERT_THAT(resp0, ArrLen(2));
   EXPECT_THAT(resp0.GetVec(), ElementsAre(kKey1, "3"));
@@ -202,10 +201,10 @@ TEST_F(ListFamilyTest, BLPopMultiPush) {
     ASSERT_THAT(resp, ArrLen(6));
   });
 
-  p1_fb.join();
-  p2_fb.join();
+  p1_fb.Join();
+  p2_fb.Join();
 
-  pop_fb.join();
+  pop_fb.Join();
 
   ASSERT_THAT(blpop_resp, ArrLen(2));
   auto resp_arr = blpop_resp.GetVec();
@@ -267,10 +266,10 @@ TEST_F(ListFamilyTest, BLPopSerialize) {
     LOG(INFO) << "push2 ts: " << cl2;
   });
 
-  p1_fb.join();
-  p2_fb.join();
+  p1_fb.Join();
+  p2_fb.Join();
 
-  pop_fb.join();
+  pop_fb.Join();
   ASSERT_THAT(blpop_resp, ArrLen(2));
   auto resp_arr = blpop_resp.GetVec();
   EXPECT_THAT(resp_arr, ElementsAre(kKey1, ArgType(RespExpr::STRING)));
@@ -303,8 +302,8 @@ TEST_F(ListFamilyTest, WrongTypeDoesNotWake) {
     Run({"lpush", kKey1, "B"});
   });
 
-  p1_fb.join();
-  pop_fb.join();
+  p1_fb.Join();
+  pop_fb.Join();
   ASSERT_THAT(blpop_resp, ArrLen(2));
   EXPECT_THAT(blpop_resp.GetVec(), ElementsAre(kKey1, "B"));
 }
@@ -321,7 +320,7 @@ TEST_F(ListFamilyTest, BPopSameKeyTwice) {
   WaitUntilLocked(0, kKey1);
 
   pp_->at(1)->Await([&] { EXPECT_EQ(1, CheckedInt({"lpush", kKey1, "bar"})); });
-  pop_fb.join();
+  pop_fb.Join();
 
   ASSERT_THAT(blpop_resp, ArrLen(2));
   EXPECT_THAT(blpop_resp.GetVec(), ElementsAre(kKey1, "bar"));
@@ -333,7 +332,7 @@ TEST_F(ListFamilyTest, BPopSameKeyTwice) {
   WaitUntilLocked(0, kKey1);
 
   pp_->at(1)->Await([&] { EXPECT_EQ(1, CheckedInt({"lpush", kKey2, "bar"})); });
-  pop_fb.join();
+  pop_fb.Join();
 
   ASSERT_THAT(blpop_resp, ArrLen(2));
   EXPECT_THAT(blpop_resp.GetVec(), ElementsAre(kKey2, "bar"));
@@ -355,7 +354,7 @@ TEST_F(ListFamilyTest, BPopTwoKeysSameShard) {
   WaitUntilLocked(0, "x");
 
   pp_->at(1)->Await([&] { EXPECT_EQ(1, CheckedInt({"lpush", "x", "bar"})); });
-  pop_fb.join();
+  pop_fb.Join();
 
   ASSERT_THAT(blpop_resp, ArrLen(2));
   EXPECT_THAT(blpop_resp.GetVec(), ElementsAre("x", "bar"));
@@ -377,7 +376,7 @@ TEST_F(ListFamilyTest, BPopRename) {
     EXPECT_EQ(1, CheckedInt({"lpush", "a", "bar"}));
     Run({"rename", "a", kKey1});
   });
-  pop_fb.join();
+  pop_fb.Join();
 
   ASSERT_THAT(blpop_resp, ArrLen(2));
   EXPECT_THAT(blpop_resp.GetVec(), ElementsAre(kKey1, "bar"));
@@ -395,7 +394,7 @@ TEST_F(ListFamilyTest, BPopFlush) {
     Run({"flushdb"});
     EXPECT_EQ(1, CheckedInt({"lpush", kKey1, "bar"}));
   });
-  pop_fb.join();
+  pop_fb.Join();
 }
 
 TEST_F(ListFamilyTest, LRem) {
@@ -641,24 +640,23 @@ TEST_F(ListFamilyTest, TwoQueueBug451) {
     for (int i = 0; i < 1000; i++) {
       Run(id, {"rpush", "a", "DATA"});
     }
-    ::boost::this_fiber::sleep_for(100ms);
+    fibers_ext::SleepFor(100ms);
     running = false;
   };
 
-  vector<boost::fibers::fiber> fbs;
+  vector<fibers_ext::Fiber> fbs;
 
   // more likely to reproduce the bug if we start pop_fiber first.
   for (int i = 0; i < 2; i++) {
     fbs.push_back(pp_->at(i)->LaunchFiber(pop_fiber));
   }
 
-
   for (int i = 0; i < 2; i++) {
     fbs.push_back(pp_->at(i)->LaunchFiber(push_fiber));
   }
 
   for (auto& f : fbs)
-    f.join();
+    f.Join();
 }
 
 }  // namespace dfly
diff --git a/src/server/main_service.cc b/src/server/main_service.cc
index 3a6b87fe6b3b..2b18005c935f 100644
--- a/src/server/main_service.cc
+++ b/src/server/main_service.cc
@@ -56,7 +56,6 @@ using namespace util;
 using base::VarzValue;
 using ::boost::intrusive_ptr;
 namespace fibers = ::boost::fibers;
-namespace this_fiber = ::boost::this_fiber;
 using absl::GetFlag;
 using absl::StrCat;
 using namespace facade;
@@ -510,7 +509,7 @@ void Service::Shutdown() {
   shard_set->Shutdown();
 
   // wait for all the pending callbacks to stop.
-  boost::this_fiber::sleep_for(10ms);
+  fibers_ext::SleepFor(10ms);
 }
 
 static void MultiSetError(ConnectionContext* cntx) {
diff --git a/src/server/rdb_test.cc b/src/server/rdb_test.cc
index cc82dec954e5..6a982670eb9a 100644
--- a/src/server/rdb_test.cc
+++ b/src/server/rdb_test.cc
@@ -226,7 +226,7 @@ TEST_F(RdbTest, SaveFlush) {
   } while (!service_->server_family().IsSaving());
 
   Run({"flushdb"});
-  save_fb.join();
+  save_fb.Join();
   auto save_info = service_->server_family().GetLastSaveInfo();
   ASSERT_EQ(1, save_info->freq_map.size());
   auto& k_v = save_info->freq_map.front();
@@ -261,7 +261,7 @@ TEST_F(RdbTest, SaveManyDbs) {
     }
   });
 
-  save_fb.join();
+  save_fb.Join();
 
   auto save_info = service_->server_family().GetLastSaveInfo();
   ASSERT_EQ(1, save_info->freq_map.size());
diff --git a/src/server/replica.cc b/src/server/replica.cc
index c5562ea7c325..9f030ac74a37 100644
--- a/src/server/replica.cc
+++ b/src/server/replica.cc
@@ -28,7 +28,6 @@ using namespace util;
 using namespace boost::asio;
 using namespace facade;
 using absl::StrCat;
-namespace this_fiber = ::boost::this_fiber;
 
 namespace {
 
@@ -171,7 +170,7 @@ void Replica::MainReplicationFb() {
   while (state_mask_ & R_ENABLED) {
     // 1. Connect socket.
     if ((state_mask_ & R_TCP_CONNECTED) == 0) {
-      this_fiber::sleep_for(500ms);
+      fibers_ext::SleepFor(500ms);
       if (is_paused_)
         continue;
 
@@ -210,7 +209,7 @@ void Replica::MainReplicationFb() {
         // triggered
         // before Redis is ready to transition to the streaming state and it silenty ignores "ACK
         // 0". We reduce the chance it happens with this delay.
-        this_fiber::sleep_for(50ms);
+        fibers_ext::SleepFor(50ms);
       }
 
       service_.SwitchState(GlobalState::LOADING, GlobalState::ACTIVE);
diff --git a/src/server/server_family.cc b/src/server/server_family.cc
index cfba4d444108..a5cc98eac987 100644
--- a/src/server/server_family.cc
+++ b/src/server/server_family.cc
@@ -403,8 +403,8 @@ void ServerFamily::Shutdown() {
     load_result_.wait();
 
   is_snapshot_done_.Notify();
-  if (snapshot_fiber_.joinable()) {
-    snapshot_fiber_.join();
+  if (snapshot_fiber_.IsJoinable()) {
+    snapshot_fiber_.Join();
   }
 
   pb_task_->Await([this] {
@@ -479,7 +479,7 @@ fibers::future<std::error_code> ServerFamily::Load(const std::string& load_path)
 
   auto& pool = service_.proactor_pool();
 
-  std::vector<::boost::fibers::fiber> load_fibers;
+  vector<util::fibers_ext::Fiber> load_fibers;
   load_fibers.reserve(paths.size());
 
   auto first_error = std::make_shared<AggregateError>();
@@ -507,7 +507,7 @@ fibers::future<std::error_code> ServerFamily::Load(const std::string& load_path)
   auto load_join_fiber = [this, first_error, load_fibers = std::move(load_fibers),
                           ec_promise = std::move(ec_promise)]() mutable {
     for (auto& fiber : load_fibers) {
-      fiber.join();
+      fiber.Join();
     }
 
     VLOG(1) << "Load finished";
diff --git a/src/server/server_family.h b/src/server/server_family.h
index 7490c8cf30cd..5f0b3a0606ff 100644
--- a/src/server/server_family.h
+++ b/src/server/server_family.h
@@ -9,6 +9,7 @@
 #include "facade/conn_context.h"
 #include "facade/redis_parser.h"
 #include "server/engine_shard_set.h"
+#include "util/fibers/fiber.h"
 #include "util/proactor_pool.h"
 
 namespace util {
@@ -148,7 +149,7 @@ class ServerFamily {
 
   void SnapshotScheduling(const SnapshotSpec& time);
 
-  boost::fibers::fiber snapshot_fiber_;
+  util::fibers_ext::Fiber snapshot_fiber_;
   boost::fibers::future<std::error_code> load_result_;
 
   uint32_t stats_caching_task_ = 0;
diff --git a/src/server/snapshot.cc b/src/server/snapshot.cc
index cb0be677181b..5bbc6436fb2d 100644
--- a/src/server/snapshot.cc
+++ b/src/server/snapshot.cc
@@ -108,7 +108,7 @@ void SliceSnapshot::Join() {
 void SliceSnapshot::IterateBucketsFb(const Cancellation* cll) {
   {
     auto fiber_name = absl::StrCat("SliceSnapshot-", ProactorBase::GetIndex());
-    this_fiber::properties<FiberProps>().set_name(std::move(fiber_name));
+    FiberProps::SetName(std::move(fiber_name));
   }
 
   PrimeTable::Cursor cursor;
@@ -138,7 +138,7 @@ void SliceSnapshot::IterateBucketsFb(const Cancellation* cll) {
 
       if (stats_.serialized >= last_yield + 100) {
         DVLOG(2) << "Before sleep " << this_fiber::properties<FiberProps>().name();
-        this_fiber::yield();
+        fibers_ext::Yield();
         DVLOG(2) << "After sleep";
 
         last_yield = stats_.serialized;
diff --git a/src/server/string_family_test.cc b/src/server/string_family_test.cc
index e03349360315..f914b8ca3dfa 100644
--- a/src/server/string_family_test.cc
+++ b/src/server/string_family_test.cc
@@ -223,8 +223,8 @@ TEST_F(StringFamilyTest, MGetSet) {
     }
   });
 
-  mget_fb.join();
-  set_fb.join();
+  mget_fb.Join();
+  set_fb.Join();
 }
 
 TEST_F(StringFamilyTest, MSetGet) {
@@ -260,8 +260,8 @@ TEST_F(StringFamilyTest, MSetGet) {
     }
   });
 
-  mset_fb.join();
-  get_fb.join();
+  mset_fb.Join();
+  get_fb.Join();
 }
 
 TEST_F(StringFamilyTest, MSetDel) {
@@ -277,8 +277,8 @@ TEST_F(StringFamilyTest, MSetDel) {
     }
   });
 
-  mset_fb.join();
-  del_fb.join();
+  mset_fb.Join();
+  del_fb.Join();
 }
 
 TEST_F(StringFamilyTest, IntKey) {
@@ -310,8 +310,8 @@ TEST_F(StringFamilyTest, SingleShard) {
       Run({"mget", "x", "b", "y"});
     }
   });
-  mset_fb.join();
-  mget_fb.join();
+  mset_fb.Join();
+  mget_fb.Join();
 }
 
 TEST_F(StringFamilyTest, MSetIncr) {
@@ -352,8 +352,8 @@ TEST_F(StringFamilyTest, MSetIncr) {
       ASSERT_LE(a, c);
     }
   });
-  mset_fb.join();
-  get_fb.join();
+  mset_fb.Join();
+  get_fb.Join();
 }
 
 TEST_F(StringFamilyTest, SetEx) {
diff --git a/src/server/test_utils.cc b/src/server/test_utils.cc
index c0de0bdae76f..a994d61a2c4c 100644
--- a/src/server/test_utils.cc
+++ b/src/server/test_utils.cc
@@ -166,7 +166,7 @@ void BaseFamilyTest::WaitUntilLocked(DbIndex db_index, string_view key, double t
   auto timeout_micro = chrono::duration_cast<chrono::microseconds>(1000ms * timeout);
   int64_t steps = timeout_micro.count() / step.count();
   do {
-    ::boost::this_fiber::sleep_for(step);
+    fibers_ext::SleepFor(step);
   } while (!IsLocked(db_index, key) && --steps > 0);
   CHECK(IsLocked(db_index, key));
 }