diff --git a/libs/binder/tests/Android.bp b/libs/binder/tests/Android.bp
index 28a3f65..642fbf3 100644
--- a/libs/binder/tests/Android.bp
+++ b/libs/binder/tests/Android.bp
@@ -70,7 +70,10 @@
     static_libs: [
         "libfakeservicemanager",
     ],
-    defaults: ["libbinder_client_cache_flag"],
+    defaults: [
+        "libbinder_client_cache_flag",
+        "libbinder_addservice_cache_flag",
+    ],
     test_suites: ["general-tests"],
     require_root: true,
 }
diff --git a/libs/binder/tests/binderCacheUnitTest.cpp b/libs/binder/tests/binderCacheUnitTest.cpp
index c5ad793..3195c55 100644
--- a/libs/binder/tests/binderCacheUnitTest.cpp
+++ b/libs/binder/tests/binderCacheUnitTest.cpp
@@ -34,6 +34,12 @@
 constexpr bool kUseLibbinderCache = false;
 #endif
 
+#ifdef LIBBINDER_ADDSERVICE_CACHE
+constexpr bool kUseCacheInAddService = true;
+#else
+constexpr bool kUseCacheInAddService = false;
+#endif
+
 // A service name which is in the static list of cachable services
 const String16 kCachedServiceName = String16("isub");
 
@@ -74,14 +80,58 @@
                 innerSm.addService(String16(name.c_str()), service, allowIsolated, dumpPriority));
     }
 
+    void clearServices() { innerSm.clear(); }
+
     FakeServiceManager innerSm;
 };
 
+class LibbinderCacheAddServiceTest : public ::testing::Test {
+protected:
+    void SetUp() override {
+        fakeServiceManager = sp<MockAidlServiceManager>::make();
+        mServiceManager = getServiceManagerShimFromAidlServiceManagerForTests(fakeServiceManager);
+        mServiceManager->enableAddServiceCache(true);
+    }
+
+    void TearDown() override {}
+
+public:
+    void cacheAddServiceAndConfirmCacheHit(const sp<IBinder>& binder1) {
+        // Add a service. This also caches it.
+        EXPECT_EQ(OK, mServiceManager->addService(kCachedServiceName, binder1));
+        // remove services from fakeservicemanager
+        fakeServiceManager->clearServices();
+
+        sp<IBinder> result = mServiceManager->checkService(kCachedServiceName);
+        if (kUseCacheInAddService && kUseLibbinderCache) {
+            // If cache is enabled, we should get the binder.
+            EXPECT_EQ(binder1, result);
+        } else {
+            // If cache is disabled, then we should get the null binder
+            EXPECT_EQ(nullptr, result);
+        }
+    }
+    sp<MockAidlServiceManager> fakeServiceManager;
+    sp<android::IServiceManager> mServiceManager;
+};
+
+TEST_F(LibbinderCacheAddServiceTest, AddLocalServiceAndConfirmCacheHit) {
+    sp<IBinder> binder1 = sp<BBinder>::make();
+    cacheAddServiceAndConfirmCacheHit(binder1);
+}
+
+TEST_F(LibbinderCacheAddServiceTest, AddRemoteServiceAndConfirmCacheHit) {
+    sp<IBinder> binder1 = defaultServiceManager()->checkService(kServerName);
+    ASSERT_NE(binder1, nullptr);
+    cacheAddServiceAndConfirmCacheHit(binder1);
+}
+
 class LibbinderCacheTest : public ::testing::Test {
 protected:
     void SetUp() override {
-        sp<MockAidlServiceManager> sm = sp<MockAidlServiceManager>::make();
-        mServiceManager = getServiceManagerShimFromAidlServiceManagerForTests(sm);
+        fakeServiceManager = sp<MockAidlServiceManager>::make();
+        mServiceManager = getServiceManagerShimFromAidlServiceManagerForTests(fakeServiceManager);
+        mServiceManager->enableAddServiceCache(false);
     }
 
     void TearDown() override {}
@@ -108,6 +158,7 @@
         }
     }
 
+    sp<MockAidlServiceManager> fakeServiceManager;
     sp<android::IServiceManager> mServiceManager;
 };
 
diff --git a/libs/binder/tests/binderLibTest.cpp b/libs/binder/tests/binderLibTest.cpp
index ec2f50c..e56b7cf 100644
--- a/libs/binder/tests/binderLibTest.cpp
+++ b/libs/binder/tests/binderLibTest.cpp
@@ -220,6 +220,8 @@
             ASSERT_GT(m_serverpid, 0);
 
             sp<IServiceManager> sm = defaultServiceManager();
+            // disable caching during addService.
+            sm->enableAddServiceCache(false);
             //printf("%s: pid %d, get service\n", __func__, m_pid);
             LIBBINDER_IGNORE("-Wdeprecated-declarations")
             m_server = sm->getService(binderLibTestServiceName);
@@ -295,6 +297,9 @@
         virtual void SetUp() {
             m_server = static_cast<BinderLibTestEnv *>(binder_env)->getServer();
             IPCThreadState::self()->restoreCallingWorkSource(0);
+            sp<IServiceManager> sm = defaultServiceManager();
+            // disable caching during addService.
+            sm->enableAddServiceCache(false);
         }
         virtual void TearDown() {
         }
@@ -1644,6 +1649,7 @@
 
 TEST(ServiceNotifications, Unregister) {
     auto sm = defaultServiceManager();
+    sm->enableAddServiceCache(false);
     using LocalRegistrationCallback = IServiceManager::LocalRegistrationCallback;
     class LocalRegistrationCallbackImpl : public virtual LocalRegistrationCallback {
         void onServiceRegistration(const String16 &, const sp<IBinder> &) override {}
@@ -2374,6 +2380,8 @@
 
     status_t ret;
     sp<IServiceManager> sm = defaultServiceManager();
+    sm->enableAddServiceCache(false);
+
     BinderLibTestService* testServicePtr;
     {
         sp<BinderLibTestService> testService = new BinderLibTestService(index);