diff --git a/src/cpp/server/server_context.cc b/src/cpp/server/server_context.cc
index ff5b80910b6..143fa3f8c98 100644
--- a/src/cpp/server/server_context.cc
+++ b/src/cpp/server/server_context.cc
@@ -73,7 +73,7 @@ class ServerContext::CompletionOp final
   // This should always be arena allocated in the call, so override delete.
   // But this class is not trivially destructible, so must actually call delete
   // before allowing the arena to be freed
-  static void operator delete(void* ptr, std::size_t size) {
+  static void operator delete(void* /*ptr*/, std::size_t size) {
     assert(size == sizeof(CompletionOp));
   }
 
diff --git a/test/core/bad_client/bad_client.cc b/test/core/bad_client/bad_client.cc
index 26550a2a701..ba402f2a3fe 100644
--- a/test/core/bad_client/bad_client.cc
+++ b/test/core/bad_client/bad_client.cc
@@ -57,7 +57,7 @@ static void thd_func(void* arg) {
 }
 
 /* Sets the done_write event */
-static void set_done_write(void* arg, grpc_error* error) {
+static void set_done_write(void* arg, grpc_error* /*error*/) {
   gpr_event* done_write = static_cast<gpr_event*>(arg);
   gpr_event_set(done_write, (void*)1);
 }
@@ -70,7 +70,7 @@ static void server_setup_transport(void* ts, grpc_transport* transport) {
 }
 
 /* Sets the read_done event */
-static void set_read_done(void* arg, grpc_error* error) {
+static void set_read_done(void* arg, grpc_error* /*error*/) {
   gpr_event* read_done = static_cast<gpr_event*>(arg);
   gpr_event_set(read_done, (void*)1);
 }
@@ -252,7 +252,7 @@ void grpc_run_bad_client_test(
 }
 
 bool client_connection_preface_validator(grpc_slice_buffer* incoming,
-                                         void* arg) {
+                                         void* /*arg*/) {
   if (incoming->count < 1) {
     return false;
   }
@@ -278,7 +278,7 @@ grpc_bad_client_arg connection_preface_arg = {
     client_connection_preface_validator, nullptr,
     CONNECTION_PREFACE_FROM_CLIENT, sizeof(CONNECTION_PREFACE_FROM_CLIENT) - 1};
 
-bool rst_stream_client_validator(grpc_slice_buffer* incoming, void* arg) {
+bool rst_stream_client_validator(grpc_slice_buffer* incoming, void* /*arg*/) {
   // Get last frame from incoming slice buffer.
   grpc_slice_buffer last_frame_buffer;
   grpc_slice_buffer_init(&last_frame_buffer);
@@ -311,7 +311,7 @@ static void* tag(intptr_t t) { return (void*)t; }
 
 void server_verifier_request_call(grpc_server* server,
                                   grpc_completion_queue* cq,
-                                  void* registered_method) {
+                                  void* /*registered_method*/) {
   grpc_call_error error;
   grpc_call* s;
   grpc_call_details call_details;
diff --git a/test/core/bad_client/tests/bad_streaming_id.cc b/test/core/bad_client/tests/bad_streaming_id.cc
index 287db433880..b63fccd8d25 100644
--- a/test/core/bad_client/tests/bad_streaming_id.cc
+++ b/test/core/bad_client/tests/bad_streaming_id.cc
@@ -75,7 +75,7 @@
 namespace {
 
 void verifier(grpc_server* server, grpc_completion_queue* cq,
-              void* registered_method) {
+              void* /*registered_method*/) {
   while (grpc_server_has_open_connections(server)) {
     GPR_ASSERT(grpc_completion_queue_next(
                    cq, grpc_timeout_milliseconds_to_deadline(20), nullptr)
diff --git a/test/core/bad_client/tests/badreq.cc b/test/core/bad_client/tests/badreq.cc
index c560dc5561c..cd6ed70c8cc 100644
--- a/test/core/bad_client/tests/badreq.cc
+++ b/test/core/bad_client/tests/badreq.cc
@@ -30,7 +30,7 @@
   "\x00\x00\x00\x04\x00\x00\x00\x00\x00" /* settings frame */
 
 static void verifier(grpc_server* server, grpc_completion_queue* cq,
-                     void* registered_method) {
+                     void* /*registered_method*/) {
   while (grpc_server_has_open_connections(server)) {
     GPR_ASSERT(grpc_completion_queue_next(
                    cq, grpc_timeout_milliseconds_to_deadline(20), nullptr)
diff --git a/test/core/bad_client/tests/connection_prefix.cc b/test/core/bad_client/tests/connection_prefix.cc
index 286a3ccafbb..b0b6ca67af4 100644
--- a/test/core/bad_client/tests/connection_prefix.cc
+++ b/test/core/bad_client/tests/connection_prefix.cc
@@ -20,7 +20,7 @@
 #include "test/core/bad_client/bad_client.h"
 
 static void verifier(grpc_server* server, grpc_completion_queue* cq,
-                     void* registered_method) {
+                     void* /*registered_method*/) {
   while (grpc_server_has_open_connections(server)) {
     GPR_ASSERT(grpc_completion_queue_next(
                    cq, grpc_timeout_milliseconds_to_deadline(20), nullptr)
diff --git a/test/core/bad_client/tests/duplicate_header.cc b/test/core/bad_client/tests/duplicate_header.cc
index dfa6e518114..ae191330281 100644
--- a/test/core/bad_client/tests/duplicate_header.cc
+++ b/test/core/bad_client/tests/duplicate_header.cc
@@ -52,7 +52,7 @@
 static void* tag(intptr_t t) { return (void*)t; }
 
 static void verifier(grpc_server* server, grpc_completion_queue* cq,
-                     void* registered_method) {
+                     void* /*registered_method*/) {
   grpc_call_error error;
   grpc_call* s;
   grpc_call_details call_details;
diff --git a/test/core/bad_client/tests/headers.cc b/test/core/bad_client/tests/headers.cc
index 02ea7597502..ed6b533e230 100644
--- a/test/core/bad_client/tests/headers.cc
+++ b/test/core/bad_client/tests/headers.cc
@@ -24,7 +24,7 @@
   "\x00\x00\x00\x04\x00\x00\x00\x00\x00"
 
 static void verifier(grpc_server* server, grpc_completion_queue* cq,
-                     void* registered_method) {
+                     void* /*registered_method*/) {
   while (grpc_server_has_open_connections(server)) {
     GPR_ASSERT(grpc_completion_queue_next(
                    cq, grpc_timeout_milliseconds_to_deadline(20), nullptr)
diff --git a/test/core/bad_client/tests/initial_settings_frame.cc b/test/core/bad_client/tests/initial_settings_frame.cc
index fcbb841331f..204bf735bfe 100644
--- a/test/core/bad_client/tests/initial_settings_frame.cc
+++ b/test/core/bad_client/tests/initial_settings_frame.cc
@@ -23,7 +23,7 @@
 #define ONE_SETTING_HDR "\x00\x00\x06\x04\x00\x00\x00\x00\x00"
 
 static void verifier(grpc_server* server, grpc_completion_queue* cq,
-                     void* registered_method) {
+                     void* /*registered_method*/) {
   while (grpc_server_has_open_connections(server)) {
     GPR_ASSERT(grpc_completion_queue_next(
                    cq, grpc_timeout_milliseconds_to_deadline(20), nullptr)
diff --git a/test/core/bad_client/tests/large_metadata.cc b/test/core/bad_client/tests/large_metadata.cc
index 520a1af0c2d..686a701dfed 100644
--- a/test/core/bad_client/tests/large_metadata.cc
+++ b/test/core/bad_client/tests/large_metadata.cc
@@ -92,9 +92,9 @@
 
 static void* tag(intptr_t t) { return (void*)t; }
 
-static void server_verifier_sends_too_much_metadata(grpc_server* server,
-                                                    grpc_completion_queue* cq,
-                                                    void* registered_method) {
+static void server_verifier_sends_too_much_metadata(
+    grpc_server* server, grpc_completion_queue* cq,
+    void* /*registered_method*/) {
   grpc_call_error error;
   grpc_call* s;
   grpc_call_details call_details;
diff --git a/test/core/bad_client/tests/out_of_bounds.cc b/test/core/bad_client/tests/out_of_bounds.cc
index b716e952bc1..1e5c8738f13 100644
--- a/test/core/bad_client/tests/out_of_bounds.cc
+++ b/test/core/bad_client/tests/out_of_bounds.cc
@@ -30,7 +30,7 @@
 namespace {
 
 void verifier(grpc_server* server, grpc_completion_queue* cq,
-              void* registered_method) {
+              void* /*registered_method*/) {
   while (grpc_server_has_open_connections(server)) {
     GPR_ASSERT(grpc_completion_queue_next(
                    cq, grpc_timeout_milliseconds_to_deadline(20), nullptr)