diff --git a/fastpair/scanning/fastpair/fast_pair_scanner_impl.cc b/fastpair/scanning/fastpair/fast_pair_scanner_impl.cc
index 7c7e6f2b..de7c675e 100644
--- a/fastpair/scanning/fastpair/fast_pair_scanner_impl.cc
+++ b/fastpair/scanning/fastpair/fast_pair_scanner_impl.cc
@@ -54,7 +54,7 @@ FastPairScannerImpl::Factory::~Factory() = default;
 
 // FastPairScannerImpl
 FastPairScannerImpl::FastPairScannerImpl() {
-  task_runner_ = std::make_shared<TaskRunnerImpl>(1);
+  task_runner_ = std::make_unique<TaskRunnerImpl>(1);
 }
 
 void FastPairScannerImpl::AddObserver(FastPairScanner::Observer* observer) {
diff --git a/fastpair/scanning/fastpair/fast_pair_scanner_impl.h b/fastpair/scanning/fastpair/fast_pair_scanner_impl.h
index 8534be02..0c8d0e17 100644
--- a/fastpair/scanning/fastpair/fast_pair_scanner_impl.h
+++ b/fastpair/scanning/fastpair/fast_pair_scanner_impl.h
@@ -71,7 +71,7 @@ class FastPairScannerImpl : public FastPairScanner {
   Ble& GetBle() { return ble_; }
 
  private:
-  std::shared_ptr<TaskRunner> task_runner_;
+  std::unique_ptr<TaskRunner> task_runner_;
 
   // Map of a Bluetooth device address to a set of advertisement data we have
   // seen.
diff --git a/fastpair/scanning/scanner_broker_impl.cc b/fastpair/scanning/scanner_broker_impl.cc
index e08279b7..fe685e03 100644
--- a/fastpair/scanning/scanner_broker_impl.cc
+++ b/fastpair/scanning/scanner_broker_impl.cc
@@ -30,7 +30,7 @@ namespace nearby {
 namespace fastpair {
 ScannerBrokerImpl::ScannerBrokerImpl() {
   adapter_ = std::make_shared<BluetoothAdapter>();
-  task_runner_ = std::make_shared<TaskRunnerImpl>(1);
+  task_runner_ = std::make_unique<TaskRunnerImpl>(1);
 }
 
 void ScannerBrokerImpl::AddObserver(Observer* observer) {
diff --git a/fastpair/scanning/scanner_broker_impl.h b/fastpair/scanning/scanner_broker_impl.h
index c496f883..10c986c9 100644
--- a/fastpair/scanning/scanner_broker_impl.h
+++ b/fastpair/scanning/scanner_broker_impl.h
@@ -48,7 +48,7 @@ class ScannerBrokerImpl : public ScannerBroker {
   void NotifyDeviceFound(const FastPairDevice& device);
   void NotifyDeviceLost(const FastPairDevice& device);
 
-  std::shared_ptr<TaskRunner> task_runner_;
+  std::unique_ptr<TaskRunner> task_runner_;
   std::shared_ptr<FastPairScanner> scanner_;
   std::shared_ptr<FastPairScannerImpl> scanner_impl_;
   std::shared_ptr<BluetoothAdapter> adapter_;