diff --git a/velox/common/memory/tests/SharedArbitratorTest.cpp b/velox/common/memory/tests/SharedArbitratorTest.cpp
index 15e5180bae480..64fc0abd1acb6 100644
--- a/velox/common/memory/tests/SharedArbitratorTest.cpp
+++ b/velox/common/memory/tests/SharedArbitratorTest.cpp
@@ -257,6 +257,7 @@ class SharedArbitrationTest : public exec::test::HiveConnectorTestBase {
   }
 
   void TearDown() override {
+    vector_.reset();
     HiveConnectorTestBase::TearDown();
   }
 
diff --git a/velox/exec/tests/DriverTest.cpp b/velox/exec/tests/DriverTest.cpp
index 64f3492acc99d..df5986d420309 100644
--- a/velox/exec/tests/DriverTest.cpp
+++ b/velox/exec/tests/DriverTest.cpp
@@ -100,6 +100,7 @@ class DriverTest : public OperatorTestBase {
     // NOTE: destroy the tasks first to release all the allocated memory held
     // by the plan nodes (Values) in tasks.
     tasks_.clear();
+    waitForAllTasksToBeDeleted();
 
     if (wakeupInitialized_) {
       wakeupCancelled_ = true;
@@ -1480,4 +1481,6 @@ TEST_F(OpCallStatusTest, basic) {
 
   task->start(1, 1);
   ASSERT_TRUE(waitForTaskCompletion(task.get(), 600'000'000));
+  task.reset();
+  waitForAllTasksToBeDeleted();
 };
diff --git a/velox/exec/tests/HashJoinTest.cpp b/velox/exec/tests/HashJoinTest.cpp
index b5344e306c8fa..0636e9908b3e1 100644
--- a/velox/exec/tests/HashJoinTest.cpp
+++ b/velox/exec/tests/HashJoinTest.cpp
@@ -791,6 +791,11 @@ class HashJoinTest : public HiveConnectorTestBase {
         .allowLazyVector = false};
   }
 
+  void TearDown() override {
+    waitForAllTasksToBeDeleted();
+    HiveConnectorTestBase::TearDown();
+  }
+
   // Make splits with each plan node having a number of source files.
   SplitInput makeSpiltInput(
       const std::vector<core::PlanNodeId>& nodeIds,
@@ -6399,7 +6404,6 @@ TEST_F(HashJoinTest, maxSpillBytes) {
           e.errorCode(), facebook::velox::error_code::kSpillLimitExceeded);
     }
   }
-  waitForAllTasksToBeDeleted();
 }
 
 TEST_F(HashJoinTest, onlyHashBuildMaxSpillBytes) {
@@ -6494,6 +6498,10 @@ TEST_F(HashJoinTest, reclaimFromJoinBuilderWithMultiDrivers) {
   auto& planStats = taskStats.at(result.planNodeId);
   ASSERT_GT(planStats.spilledBytes, 0);
   result.task.reset();
+
+  // This test uses on-demand created memory manager instead of the global
+  // one. We need to make sure any used memory got cleaned up before exiting
+  // the scope
   waitForAllTasksToBeDeleted();
   ASSERT_GT(arbitrator->stats().numRequests, 0);
   ASSERT_GT(arbitrator->stats().numReclaimedBytes, 0);
@@ -6568,6 +6576,10 @@ DEBUG_ONLY_TEST_F(
   memoryArbitrationWait.notifyAll();
 
   joinThread.join();
+
+  // This test uses on-demand created memory manager instead of the global
+  // one. We need to make sure any used memory got cleaned up before exiting
+  // the scope
   waitForAllTasksToBeDeleted();
   ASSERT_EQ(arbitrator->stats().numNonReclaimableAttempts, 2);
 }
@@ -6652,10 +6664,13 @@ DEBUG_ONLY_TEST_F(HashJoinTest, reclaimFromHashJoinBuildInWaitForTableBuild) {
 
   // We expect the reclaimed bytes from hash build.
   ASSERT_GT(arbitrator->stats().numReclaimedBytes, 0);
+
+  // This test uses on-demand created memory manager instead of the global
+  // one. We need to make sure any used memory got cleaned up before exiting
+  // the scope
   waitForAllTasksToBeDeleted();
   ASSERT_TRUE(fakeBuffer != nullptr);
   fakePool->free(fakeBuffer, kMemoryCapacity);
-  waitForAllTasksToBeDeleted();
 }
 
 DEBUG_ONLY_TEST_F(HashJoinTest, arbitrationTriggeredDuringParallelJoinBuild) {
@@ -6707,6 +6722,10 @@ DEBUG_ONLY_TEST_F(HashJoinTest, arbitrationTriggeredDuringParallelJoinBuild) {
       .assertResults(
           "SELECT t.c1 FROM tmp as t, tmp AS u WHERE t.c0 == u.c1 AND t.c1 == u.c0");
   ASSERT_TRUE(parallelBuildTriggered);
+
+  // This test uses on-demand created memory manager instead of the global
+  // one. We need to make sure any used memory got cleaned up before exiting
+  // the scope
   waitForAllTasksToBeDeleted();
 }
 
@@ -6793,6 +6812,10 @@ DEBUG_ONLY_TEST_F(HashJoinTest, arbitrationTriggeredByEnsureJoinTableFit) {
           .assertResults(
               "SELECT t.c1 FROM tmp as t, tmp AS u WHERE t.c0 == u.c1 AND t.c1 == u.c0");
   task.reset();
+
+  // This test uses on-demand created memory manager instead of the global
+  // one. We need to make sure any used memory got cleaned up before exiting
+  // the scope
   waitForAllTasksToBeDeleted();
   ASSERT_EQ(injectAllocations.size(), 2);
 }
@@ -6887,6 +6910,10 @@ DEBUG_ONLY_TEST_F(HashJoinTest, reclaimDuringJoinTableBuild) {
 
   joinThread.join();
   memThread.join();
+
+  // This test uses on-demand created memory manager instead of the global
+  // one. We need to make sure any used memory got cleaned up before exiting
+  // the scope
   waitForAllTasksToBeDeleted();
 }
 
@@ -6947,6 +6974,11 @@ DEBUG_ONLY_TEST_F(HashJoinTest, joinBuildSpillError) {
   waitForAllTasksToBeDeleted();
   ASSERT_EQ(arbitrator->stats().numFailures, 1);
   ASSERT_EQ(arbitrator->stats().numReserves, 1);
+
+  // Wait again here as this test uses on-demand created memory manager instead
+  // of the global one. We need to make sure any used memory got cleaned up
+  // before exiting the scope
+  waitForAllTasksToBeDeleted();
 }
 
 DEBUG_ONLY_TEST_F(HashJoinTest, taskWaitTimeout) {
@@ -7024,6 +7056,10 @@ DEBUG_ONLY_TEST_F(HashJoinTest, taskWaitTimeout) {
     buildBlockWait.notifyAll();
 
     queryThread.join();
+
+    // This test uses on-demand created memory manager instead of the global
+    // one. We need to make sure any used memory got cleaned up before exiting
+    // the scope
     waitForAllTasksToBeDeleted();
   }
 }
diff --git a/velox/exec/tests/MultiFragmentTest.cpp b/velox/exec/tests/MultiFragmentTest.cpp
index 1e9af9fc7f840..f86ac89ff09e7 100644
--- a/velox/exec/tests/MultiFragmentTest.cpp
+++ b/velox/exec/tests/MultiFragmentTest.cpp
@@ -46,6 +46,12 @@ class MultiFragmentTest : public HiveConnectorTestBase {
     exec::ExchangeSource::registerFactory(createLocalExchangeSource);
   }
 
+  void TearDown() override {
+    waitForAllTasksToBeDeleted();
+    vectors_.clear();
+    HiveConnectorTestBase::TearDown();
+  }
+
   static std::string makeTaskId(const std::string& prefix, int num) {
     return fmt::format("local://{}-{}", prefix, num);
   }
diff --git a/velox/exec/tests/OperatorUtilsTest.cpp b/velox/exec/tests/OperatorUtilsTest.cpp
index 09fff638f09d3..8f12362a837de 100644
--- a/velox/exec/tests/OperatorUtilsTest.cpp
+++ b/velox/exec/tests/OperatorUtilsTest.cpp
@@ -23,10 +23,18 @@
 using namespace facebook::velox;
 using namespace facebook::velox::test;
 using namespace facebook::velox::exec;
+using namespace facebook::velox::exec::test;
 
-class OperatorUtilsTest
-    : public ::facebook::velox::exec::test::OperatorTestBase {
+class OperatorUtilsTest : public OperatorTestBase {
  protected:
+  void TearDown() override {
+    driverCtx_.reset();
+    driver_.reset();
+    task_.reset();
+    waitForAllTasksToBeDeleted();
+    OperatorTestBase::TearDown();
+  }
+
   OperatorUtilsTest() {
     VectorMaker vectorMaker{pool_.get()};
     std::vector<RowVectorPtr> values = {vectorMaker.rowVector(
@@ -124,8 +132,8 @@ class OperatorUtilsTest
     }
   }
 
-  std::shared_ptr<memory::MemoryPool> pool_{
-      memory::memoryManager()->addLeafPool()};
+  //  std::shared_ptr<memory::MemoryPool> pool_{
+  //      memory::memoryManager()->addLeafPool()};
   std::shared_ptr<Task> task_;
   std::shared_ptr<Driver> driver_;
   std::unique_ptr<DriverCtx> driverCtx_;
diff --git a/velox/exec/tests/SortBufferTest.cpp b/velox/exec/tests/SortBufferTest.cpp
index 83a23fbefeea6..1b331ffe3d597 100644
--- a/velox/exec/tests/SortBufferTest.cpp
+++ b/velox/exec/tests/SortBufferTest.cpp
@@ -42,6 +42,12 @@ class SortBufferTest : public OperatorTestBase {
     rng_.seed(123);
   }
 
+  void TearDown() override {
+    pool_.reset();
+    rootPool_.reset();
+    OperatorTestBase::TearDown();
+  }
+
   common::SpillConfig getSpillConfig(const std::string& spillDir) const {
     return common::SpillConfig(
         [&]() -> const std::string& { return spillDir; },
@@ -74,14 +80,14 @@ class SortBufferTest : public OperatorTestBase {
       {true, true, false, CompareFlags::NullHandlingMode::kNullAsValue}};
 
   const int64_t maxBytes_ = 20LL << 20; // 20 MB
-  const std::shared_ptr<memory::MemoryPool> rootPool_{
-      memory::memoryManager()->addRootPool("SortBufferTest", maxBytes_)};
-  const std::shared_ptr<memory::MemoryPool> pool_{
-      rootPool_->addLeafChild("SortBufferTest", maxBytes_)};
   const std::shared_ptr<folly::Executor> executor_{
       std::make_shared<folly::CPUThreadPoolExecutor>(
           std::thread::hardware_concurrency())};
 
+  std::shared_ptr<memory::MemoryPool> rootPool_{
+      memory::memoryManager()->addRootPool("SortBufferTest", maxBytes_)};
+  std::shared_ptr<memory::MemoryPool> pool_{
+      rootPool_->addLeafChild("SortBufferTest", maxBytes_)};
   tsan_atomic<bool> nonReclaimableSection_{false};
   folly::Random::DefaultGenerator rng_;
 };
diff --git a/velox/exec/tests/SqlTest.cpp b/velox/exec/tests/SqlTest.cpp
index d318f5a9d4ee0..8ad448474e9e0 100644
--- a/velox/exec/tests/SqlTest.cpp
+++ b/velox/exec/tests/SqlTest.cpp
@@ -21,13 +21,19 @@ namespace facebook::velox::exec::test {
 
 class SqlTest : public OperatorTestBase {
  protected:
+  void TearDown() override {
+    planner_.reset();
+    OperatorTestBase::TearDown();
+  }
+
   void assertSql(const std::string& sql, const std::string& duckSql = "") {
-    auto plan = planner_.plan(sql);
+    auto plan = planner_->plan(sql);
     AssertQueryBuilder(plan, duckDbQueryRunner_)
         .assertResults(duckSql.empty() ? sql : duckSql);
   }
 
-  core::DuckDbQueryPlanner planner_{pool()};
+  std::unique_ptr<core::DuckDbQueryPlanner> planner_{
+      std::make_unique<core::DuckDbQueryPlanner>(pool())};
 };
 
 TEST_F(SqlTest, values) {
@@ -40,7 +46,7 @@ TEST_F(SqlTest, values) {
 }
 
 TEST_F(SqlTest, customScalarFunctions) {
-  planner_.registerScalarFunction(
+  planner_->registerScalarFunction(
       "array_join", {ARRAY(BIGINT()), VARCHAR()}, VARCHAR());
 
   assertSql("SELECT array_join([1, 2, 3], '-')", "SELECT '1-2-3'");
@@ -49,7 +55,7 @@ TEST_F(SqlTest, customScalarFunctions) {
 TEST_F(SqlTest, customAggregateFunctions) {
   // We need an aggregate that DuckDB does not support. 'every' fits the need.
   // 'every' is an alias for bool_and().
-  planner_.registerAggregateFunction("every", {BOOLEAN()}, BOOLEAN());
+  planner_->registerAggregateFunction("every", {BOOLEAN()}, BOOLEAN());
 
   assertSql(
       "SELECT every(x) FROM UNNEST([true, false, true]) as t(x)",
@@ -81,8 +87,8 @@ TEST_F(SqlTest, tableScan) {
   createDuckDbTable("t", data.at("t"));
   createDuckDbTable("u", data.at("u"));
 
-  planner_.registerTable("t", data.at("t"));
-  planner_.registerTable("u", data.at("u"));
+  planner_->registerTable("t", data.at("t"));
+  planner_->registerTable("u", data.at("u"));
 
   assertSql("SELECT a, avg(b) FROM t WHERE c > 5 GROUP BY 1");
   assertSql("SELECT * FROM t, u WHERE t.a = u.a");
diff --git a/velox/exec/tests/TaskTest.cpp b/velox/exec/tests/TaskTest.cpp
index 397341dcea46c..4ae9220b28dbf 100644
--- a/velox/exec/tests/TaskTest.cpp
+++ b/velox/exec/tests/TaskTest.cpp
@@ -455,8 +455,14 @@ class TestBadMemoryTranslator : public exec::Operator::PlanNodeTranslator {
   }
 };
 } // namespace
+
 class TaskTest : public HiveConnectorTestBase {
  protected:
+  void TearDown() override {
+    waitForAllTasksToBeDeleted();
+    HiveConnectorTestBase::TearDown();
+  }
+
   static std::pair<std::shared_ptr<exec::Task>, std::vector<RowVectorPtr>>
   executeSingleThreaded(
       core::PlanFragment plan,
diff --git a/velox/exec/tests/ValuesTest.cpp b/velox/exec/tests/ValuesTest.cpp
index fc58e6351470a..f9d79872af45c 100644
--- a/velox/exec/tests/ValuesTest.cpp
+++ b/velox/exec/tests/ValuesTest.cpp
@@ -25,6 +25,13 @@ namespace facebook::velox::exec::test {
 
 class ValuesTest : public OperatorTestBase {
  protected:
+  void TearDown() override {
+    waitForAllTasksToBeDeleted();
+    input_.reset();
+    input2_.reset();
+    OperatorTestBase::TearDown();
+  }
+
   // Sample row vectors.
   RowVectorPtr input_{makeRowVector({
       makeFlatVector<int32_t>({0, 1, 2, 3, 5}),
diff --git a/velox/exec/tests/utils/OperatorTestBase.cpp b/velox/exec/tests/utils/OperatorTestBase.cpp
index d0366ef8d7845..7ad53cc8889a4 100644
--- a/velox/exec/tests/utils/OperatorTestBase.cpp
+++ b/velox/exec/tests/utils/OperatorTestBase.cpp
@@ -64,6 +64,23 @@ void OperatorTestBase::SetUpTestCase() {
   FLAGS_velox_enable_memory_usage_track_in_default_memory_pool = true;
   FLAGS_velox_memory_leak_check_enabled = true;
   memory::SharedArbitrator::registerFactory();
+  resetMemory();
+  functions::prestosql::registerAllScalarFunctions();
+  aggregate::prestosql::registerAllAggregateFunctions();
+  TestValue::enable();
+}
+
+void OperatorTestBase::TearDownTestCase() {
+  asyncDataCache_->shutdown();
+  waitForAllTasksToBeDeleted();
+  memory::SharedArbitrator::unregisterFactory();
+}
+
+void OperatorTestBase::resetMemory() {
+  if (asyncDataCache_ != nullptr) {
+    asyncDataCache_->clear();
+    asyncDataCache_.reset();
+  }
   MemoryManagerOptions options;
   options.allocatorCapacity = 8L << 30;
   options.arbitratorCapacity = 6L << 30;
@@ -75,15 +92,6 @@ void OperatorTestBase::SetUpTestCase() {
   asyncDataCache_ =
       cache::AsyncDataCache::create(memory::memoryManager()->allocator());
   cache::AsyncDataCache::setInstance(asyncDataCache_.get());
-  functions::prestosql::registerAllScalarFunctions();
-  aggregate::prestosql::registerAllAggregateFunctions();
-  TestValue::enable();
-}
-
-void OperatorTestBase::TearDownTestCase() {
-  asyncDataCache_->shutdown();
-  waitForAllTasksToBeDeleted();
-  memory::SharedArbitrator::unregisterFactory();
 }
 
 void OperatorTestBase::SetUp() {
@@ -94,7 +102,11 @@ void OperatorTestBase::SetUp() {
   ioExecutor_ = std::make_unique<folly::IOThreadPoolExecutor>(3);
 }
 
-void OperatorTestBase::TearDown() {}
+void OperatorTestBase::TearDown() {
+  pool_.reset();
+  rootPool_.reset();
+  resetMemory();
+}
 
 std::shared_ptr<Task> OperatorTestBase::assertQuery(
     const core::PlanNodePtr& plan,
diff --git a/velox/exec/tests/utils/OperatorTestBase.h b/velox/exec/tests/utils/OperatorTestBase.h
index 54eb0d6b97eb4..065b40ecf2422 100644
--- a/velox/exec/tests/utils/OperatorTestBase.h
+++ b/velox/exec/tests/utils/OperatorTestBase.h
@@ -47,6 +47,8 @@ class OperatorTestBase : public testing::Test,
 
   static void TearDownTestCase();
 
+  static void resetMemory();
+
   void createDuckDbTable(const std::vector<RowVectorPtr>& data) {
     duckDbQueryRunner_.createTable("tmp", data);
   }
diff --git a/velox/functions/prestosql/aggregates/tests/ApproxPercentileTest.cpp b/velox/functions/prestosql/aggregates/tests/ApproxPercentileTest.cpp
index 48065a1a30f49..6e131c1c6190a 100644
--- a/velox/functions/prestosql/aggregates/tests/ApproxPercentileTest.cpp
+++ b/velox/functions/prestosql/aggregates/tests/ApproxPercentileTest.cpp
@@ -379,6 +379,7 @@ TEST_F(ApproxPercentileTest, partialFull) {
       makeFlatVector<int32_t>(117, [](auto row) { return row < 7 ? 20 : 10; }),
   });
   exec::test::assertQuery(params, {expected});
+  waitForAllTasksToBeDeleted();
 }
 
 TEST_F(ApproxPercentileTest, finalAggregateAccuracy) {
diff --git a/velox/functions/prestosql/aggregates/tests/MinMaxByAggregationTest.cpp b/velox/functions/prestosql/aggregates/tests/MinMaxByAggregationTest.cpp
index 98968958c1658..2b2bc302f37b2 100644
--- a/velox/functions/prestosql/aggregates/tests/MinMaxByAggregationTest.cpp
+++ b/velox/functions/prestosql/aggregates/tests/MinMaxByAggregationTest.cpp
@@ -143,6 +143,12 @@ class MinMaxByAggregationTestBase : public AggregationTestBase {
 
   void SetUp() override;
 
+  void TearDown() override {
+    dataVectorsByType_.clear();
+    rowVectors_.clear();
+    AggregationTestBase::TearDown();
+  }
+
   // Build a flat vector with numeric native type of T. The value in the
   // returned flat vector is in ascending order.
   template <typename T>