diff --git a/test/core/http/request_fuzzer.cc b/test/core/http/request_fuzzer.cc
index 368ac1b49db..9798cfb33c7 100644
--- a/test/core/http/request_fuzzer.cc
+++ b/test/core/http/request_fuzzer.cc
@@ -20,6 +20,7 @@
 #include <stdint.h>
 #include <string.h>
 
+#include <grpc/grpc.h>
 #include <grpc/support/alloc.h>
 
 #include "src/core/lib/http/parser.h"
@@ -30,6 +31,7 @@ bool leak_check = true;
 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   grpc_http_parser parser;
   grpc_http_request request;
+  grpc_init();
   memset(&request, 0, sizeof(request));
   grpc_http_parser_init(&parser, GRPC_HTTP_REQUEST, &request);
   grpc_slice slice = grpc_slice_from_copied_buffer((const char*)data, size);
@@ -38,5 +40,6 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   grpc_slice_unref(slice);
   grpc_http_parser_destroy(&parser);
   grpc_http_request_destroy(&request);
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/http/response_fuzzer.cc b/test/core/http/response_fuzzer.cc
index 2a793fddd4b..fc0904b1db7 100644
--- a/test/core/http/response_fuzzer.cc
+++ b/test/core/http/response_fuzzer.cc
@@ -19,6 +19,7 @@
 #include <stdint.h>
 #include <string.h>
 
+#include <grpc/grpc.h>
 #include <grpc/support/alloc.h>
 
 #include "src/core/lib/http/parser.h"
@@ -29,6 +30,7 @@ bool leak_check = true;
 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   grpc_http_parser parser;
   grpc_http_response response;
+  grpc_init();
   memset(&response, 0, sizeof(response));
   grpc_http_parser_init(&parser, GRPC_HTTP_RESPONSE, &response);
   grpc_slice slice = grpc_slice_from_copied_buffer((const char*)data, size);
@@ -37,5 +39,6 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   grpc_slice_unref(slice);
   grpc_http_parser_destroy(&parser);
   grpc_http_response_destroy(&response);
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/iomgr/resolve_address_posix_test.cc b/test/core/iomgr/resolve_address_posix_test.cc
index 0ea57e22023..45a5e5a0b13 100644
--- a/test/core/iomgr/resolve_address_posix_test.cc
+++ b/test/core/iomgr/resolve_address_posix_test.cc
@@ -79,9 +79,9 @@ static grpc_millis n_sec_deadline(int seconds) {
 
 static void actually_poll(void* argsp) {
   args_struct* args = static_cast<args_struct*>(argsp);
-  grpc_core::ExecCtx _local_exec_ctx;
   grpc_millis deadline = n_sec_deadline(10);
   while (true) {
+    grpc_core::ExecCtx _local_exec_ctx;
     bool done = gpr_atm_acq_load(&args->done_atm) != 0;
     if (done) {
       break;
diff --git a/test/core/nanopb/fuzzer_response.cc b/test/core/nanopb/fuzzer_response.cc
index 7039c801cb9..3a70dea5e98 100644
--- a/test/core/nanopb/fuzzer_response.cc
+++ b/test/core/nanopb/fuzzer_response.cc
@@ -19,6 +19,7 @@
 #include <stdint.h>
 #include <string.h>
 
+#include <grpc/grpc.h>
 #include <grpc/support/alloc.h>
 
 #include "src/core/ext/filters/client_channel/lb_policy/grpclb/load_balancer_api.h"
@@ -29,6 +30,7 @@ bool leak_check = true;
 static void dont_log(gpr_log_func_args* args) {}
 
 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  grpc_init();
   if (squelch) gpr_set_log_function(dont_log);
   grpc_slice slice = grpc_slice_from_copied_buffer((const char*)data, size);
   grpc_grpclb_initial_response* response;
@@ -36,5 +38,6 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
     grpc_grpclb_initial_response_destroy(response);
   }
   grpc_slice_unref(slice);
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/nanopb/fuzzer_serverlist.cc b/test/core/nanopb/fuzzer_serverlist.cc
index 0a6b1767a1a..d0af117ef96 100644
--- a/test/core/nanopb/fuzzer_serverlist.cc
+++ b/test/core/nanopb/fuzzer_serverlist.cc
@@ -19,6 +19,7 @@
 #include <stdint.h>
 #include <string.h>
 
+#include <grpc/grpc.h>
 #include <grpc/support/alloc.h>
 
 #include "src/core/ext/filters/client_channel/lb_policy/grpclb/load_balancer_api.h"
@@ -29,6 +30,7 @@ bool leak_check = true;
 static void dont_log(gpr_log_func_args* args) {}
 
 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  grpc_init();
   if (squelch) gpr_set_log_function(dont_log);
   grpc_slice slice = grpc_slice_from_copied_buffer((const char*)data, size);
   grpc_grpclb_serverlist* serverlist;
@@ -36,5 +38,6 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
     grpc_grpclb_destroy_serverlist(serverlist);
   }
   grpc_slice_unref(slice);
+  grpc_shutdown();
   return 0;
 }
diff --git a/test/core/surface/completion_queue_threading_test.cc b/test/core/surface/completion_queue_threading_test.cc
index d923387e23e..8867ba88c3a 100644
--- a/test/core/surface/completion_queue_threading_test.cc
+++ b/test/core/surface/completion_queue_threading_test.cc
@@ -142,7 +142,6 @@ static void free_completion(void* arg, grpc_cq_completion* completion) {
 static void producer_thread(void* arg) {
   test_thread_options* opt = static_cast<test_thread_options*>(arg);
   int i;
-  grpc_core::ExecCtx _local_exec_ctx;
 
   gpr_log(GPR_INFO, "producer %d started", opt->id);
   gpr_event_set(&opt->on_started, (void*)(intptr_t)1);
@@ -159,6 +158,7 @@ static void producer_thread(void* arg) {
 
   gpr_log(GPR_INFO, "producer %d phase 2", opt->id);
   for (i = 0; i < TEST_THREAD_EVENTS; i++) {
+    grpc_core::ExecCtx _local_exec_ctx;
     grpc_cq_end_op(opt->cc, (void*)(intptr_t)1, GRPC_ERROR_NONE,
                    free_completion, nullptr,
                    static_cast<grpc_cq_completion*>(