diff --git a/source/common/common/thread.cc b/source/common/common/thread.cc
index 282858399000..e6ee78c8e520 100644
--- a/source/common/common/thread.cc
+++ b/source/common/common/thread.cc
@@ -13,16 +13,6 @@ bool MainThread::isMainThread() {
   return main_thread_singleton->inMainThread() || main_thread_singleton->inTestThread();
 }
 
-bool MainThread::isWorkerThread() {
-  auto main_thread_singleton = MainThreadSingleton::getExisting();
-  // Allow worker thread code to be executed in test thread.
-  if (main_thread_singleton == nullptr) {
-    return true;
-  }
-  // When threading is on, compare thread id with main thread id.
-  return !main_thread_singleton->inMainThread();
-}
-
 void MainThread::clear() {
   delete MainThreadSingleton::getExisting();
   MainThreadSingleton::clear();
diff --git a/source/common/common/thread.h b/source/common/common/thread.h
index 347df89c9fab..1ade49a3d1b9 100644
--- a/source/common/common/thread.h
+++ b/source/common/common/thread.h
@@ -194,7 +194,6 @@ struct MainThread {
    */
   static void clear();
   static bool isMainThread();
-  static bool isWorkerThread();
 
 private:
   std::thread::id main_thread_id_;
diff --git a/source/common/network/address_impl.cc b/source/common/network/address_impl.cc
index e612505d8336..5954724186bc 100644
--- a/source/common/network/address_impl.cc
+++ b/source/common/network/address_impl.cc
@@ -110,7 +110,6 @@ addressFromSockAddrOrDie(const sockaddr_storage& ss, socklen_t ss_len, os_fd_t f
   // address and the socket is actually v6 only, the returned address will be
   // regarded as a v6 address from dual stack socket. However, this address is not going to be
   // used to create socket. Wrong knowledge of dual stack support won't hurt.
-  ASSERT(Thread::MainThread::isWorkerThread());
   StatusOr<Address::InstanceConstSharedPtr> address =
       Address::addressFromSockAddr(ss, ss_len, v6only);
   if (!address.ok()) {
diff --git a/test/common/thread_local/thread_local_impl_test.cc b/test/common/thread_local/thread_local_impl_test.cc
index 6e2586db580a..f6937240803d 100644
--- a/test/common/thread_local/thread_local_impl_test.cc
+++ b/test/common/thread_local/thread_local_impl_test.cc
@@ -18,13 +18,11 @@ namespace ThreadLocal {
 TEST(MainThreadVerificationTest, All) {
   // Before threading is on, assertion on main thread should be true.
   EXPECT_TRUE(Thread::MainThread::isMainThread());
-  EXPECT_TRUE(Thread::MainThread::isWorkerThread());
   {
     InstanceImpl tls;
     // Tls instance has been initialized.
     // Call to main thread verification should succeed in main thread.
     EXPECT_TRUE(Thread::MainThread::isMainThread());
-    EXPECT_FALSE(Thread::MainThread::isWorkerThread());
     tls.shutdownGlobalThreading();
     tls.shutdownThread();
   }