diff --git a/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_ev_driver_posix.cc b/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_ev_driver_posix.cc
index e1d3884677e..70f784720e1 100644
--- a/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_ev_driver_posix.cc
+++ b/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_ev_driver_posix.cc
@@ -98,7 +98,7 @@ class GrpcPolledFdFactoryPosix : public GrpcPolledFdFactory {
 };
 
 std::unique_ptr<GrpcPolledFdFactory> NewGrpcPolledFdFactory(
-    std::shared_ptr<WorkSerializer> /*work_serializer*/) {
+    std::shared_ptr<WorkSerializer> work_serializer) { /* NOLINT */
   return MakeUnique<GrpcPolledFdFactoryPosix>();
 }
 
diff --git a/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_ev_driver_windows.cc b/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_ev_driver_windows.cc
index 1be5906a7ba..6f0903089f0 100644
--- a/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_ev_driver_windows.cc
+++ b/src/core/ext/filters/client_channel/resolver/dns/c_ares/grpc_ares_ev_driver_windows.cc
@@ -577,7 +577,8 @@ class GrpcPolledFdWindows {
     GrpcPolledFdWindows* polled_fd = static_cast<GrpcPolledFdWindows*>(arg);
     GRPC_ERROR_REF(error);  // ref owned by lambda
     polled_fd->work_serializer_->Run(
-        [polled_fd, error]() { OnIocpReadableLocked(error); }, DEBUG_LOCATION);
+        [polled_fd, error]() { polled_fd->OnIocpReadableLocked(error); },
+        DEBUG_LOCATION);
   }
 
   // TODO(apolcyn): improve this error handling to be less conversative.
diff --git a/test/core/client_channel/resolvers/dns_resolver_connectivity_test.cc b/test/core/client_channel/resolvers/dns_resolver_connectivity_test.cc
index a5e2e5a6b0e..5a80a61e984 100644
--- a/test/core/client_channel/resolvers/dns_resolver_connectivity_test.cc
+++ b/test/core/client_channel/resolvers/dns_resolver_connectivity_test.cc
@@ -66,7 +66,8 @@ static grpc_ares_request* my_dns_lookup_ares_locked(
     std::unique_ptr<grpc_core::ServerAddressList>* addresses,
     bool /*check_grpclb*/, char** /*service_config_json*/,
     int /*query_timeout_ms*/,
-    std::shared_ptr<grpc_core::WorkSerializer> /*work_serializer*/) {
+    std::shared_ptr<
+        grpc_core::WorkSerializer> /* work_serializer */) { /* NOLINT */
   gpr_mu_lock(&g_mu);
   GPR_ASSERT(0 == strcmp("test", addr));
   grpc_error* error = GRPC_ERROR_NONE;
diff --git a/test/core/end2end/fuzzers/api_fuzzer.cc b/test/core/end2end/fuzzers/api_fuzzer.cc
index 0d2563d38d3..ce900814f3a 100644
--- a/test/core/end2end/fuzzers/api_fuzzer.cc
+++ b/test/core/end2end/fuzzers/api_fuzzer.cc
@@ -380,7 +380,8 @@ grpc_ares_request* my_dns_lookup_ares_locked(
     std::unique_ptr<grpc_core::ServerAddressList>* addresses,
     bool /*check_grpclb*/, char** /*service_config_json*/,
     int /*query_timeout*/,
-    std::shared_ptr<grpc_core::WorkSerializer> /*work_serializer*/) {
+    std::shared_ptr<
+        grpc_core::WorkSerializer> /* work_serializer */) { /* NOLINT */
   addr_req* r = static_cast<addr_req*>(gpr_malloc(sizeof(*r)));
   r->addr = gpr_strdup(addr);
   r->on_done = on_done;