diff --git a/sharing/fake_nearby_sharing_service.cc b/sharing/fake_nearby_sharing_service.cc
index 42538323..c5975af4 100644
--- a/sharing/fake_nearby_sharing_service.cc
+++ b/sharing/fake_nearby_sharing_service.cc
@@ -18,6 +18,7 @@
 #include <functional>
 #include <memory>
 #include <string>
+#include <utility>
 
 #include "location/nearby/sharing/lib/sync/sync_manager.h"
 #include "absl/functional/any_invocable.h"
@@ -165,6 +166,14 @@ void FakeNearbySharingService::Cancel(
   status_codes_callback(StatusCodes::kOk);
 }
 
+void FakeNearbySharingService::InitiatePairing(
+    int64_t share_target_id, service::proto::BindingRequest::Type binding_type,
+    absl::AnyInvocable<void(StatusCodes status_codes) &&>
+        status_codes_callback) {
+  initiate_pairing_callbacks_[share_target_id] =
+      std::move(status_codes_callback);
+}
+
 std::string FakeNearbySharingService::Dump() const { return ""; }
 
 NearbyShareSettings* FakeNearbySharingService::GetSettings() { return nullptr; }
@@ -281,5 +290,16 @@ void FakeNearbySharingService::FireShareTargetLost(ShareTarget share_target) {
   }
 }
 
+void FakeNearbySharingService::FireInitiatePairingResult(
+    int64_t share_target_id, StatusCodes status) {
+  auto it = initiate_pairing_callbacks_.find(share_target_id);
+  if (it == initiate_pairing_callbacks_.end()) {
+    return;
+  }
+  auto callback = std::move(it->second);
+  initiate_pairing_callbacks_.erase(it);
+  std::move(callback)(status);
+}
+
 }  // namespace sharing
 }  // namespace nearby
diff --git a/sharing/fake_nearby_sharing_service.h b/sharing/fake_nearby_sharing_service.h
index db47f7b1..4cd22969 100644
--- a/sharing/fake_nearby_sharing_service.h
+++ b/sharing/fake_nearby_sharing_service.h
@@ -121,7 +121,7 @@ class FakeNearbySharingService : public NearbySharingService {
       int64_t share_target_id,
       service::proto::BindingRequest::Type binding_type,
       absl::AnyInvocable<void(StatusCodes status_codes) &&>
-          status_codes_callback) override {}
+          status_codes_callback) override;
 
   std::string Dump() const override;
   bool IsBluetoothPresent() const override { return true; }
@@ -180,6 +180,7 @@ class FakeNearbySharingService : public NearbySharingService {
   void FireShareTargetDiscovered(ShareTarget share_target);
   void FireShareTargetUpdated(ShareTarget share_target);
   void FireShareTargetLost(ShareTarget share_target);
+  void FireInitiatePairingResult(int64_t share_target_id, StatusCodes status);
 
  private:
   ObserverList<Observer> observers_;
@@ -202,6 +203,9 @@ class FakeNearbySharingService : public NearbySharingService {
   FakeNearbyIdentityClient identity_rpc_client_;
   std::unique_ptr<SyncManager> sync_manager_;
   std::unique_ptr<OutgoingTargetsManager> outgoing_targets_manager_;
+  absl::flat_hash_map<int64_t,
+                      absl::AnyInvocable<void(StatusCodes status_codes) &&>>
+      initiate_pairing_callbacks_;
 };
 
 }  // namespace sharing