diff --git a/test/code_size/hello_webgl2_wasm.json b/test/code_size/hello_webgl2_wasm.json
index c7adcb29ddcc9..05483046abde8 100644
--- a/test/code_size/hello_webgl2_wasm.json
+++ b/test/code_size/hello_webgl2_wasm.json
@@ -3,8 +3,8 @@
   "a.html.gz": 379,
   "a.js": 4700,
   "a.js.gz": 2417,
-  "a.wasm": 10479,
-  "a.wasm.gz": 6713,
-  "total": 15748,
-  "total_gz": 9509
+  "a.wasm": 10474,
+  "a.wasm.gz": 6697,
+  "total": 15743,
+  "total_gz": 9493
 }
diff --git a/test/code_size/hello_webgl2_wasm2js.json b/test/code_size/hello_webgl2_wasm2js.json
index 5ddd00e86a13a..bd12fa054fed9 100644
--- a/test/code_size/hello_webgl2_wasm2js.json
+++ b/test/code_size/hello_webgl2_wasm2js.json
@@ -1,10 +1,10 @@
 {
   "a.html": 567,
   "a.html.gz": 379,
-  "a.js": 17975,
-  "a.js.gz": 8044,
+  "a.js": 17955,
+  "a.js.gz": 8048,
   "a.mem": 3171,
   "a.mem.gz": 2713,
-  "total": 21713,
-  "total_gz": 11136
+  "total": 21693,
+  "total_gz": 11140
 }
diff --git a/test/code_size/hello_webgl_wasm.json b/test/code_size/hello_webgl_wasm.json
index 9ebc12e7f2585..d231fed19f114 100644
--- a/test/code_size/hello_webgl_wasm.json
+++ b/test/code_size/hello_webgl_wasm.json
@@ -3,8 +3,8 @@
   "a.html.gz": 379,
   "a.js": 4186,
   "a.js.gz": 2244,
-  "a.wasm": 10479,
-  "a.wasm.gz": 6713,
-  "total": 15234,
-  "total_gz": 9336
+  "a.wasm": 10474,
+  "a.wasm.gz": 6697,
+  "total": 15229,
+  "total_gz": 9320
 }
diff --git a/test/code_size/hello_webgl_wasm2js.json b/test/code_size/hello_webgl_wasm2js.json
index a70cae1240070..a103db8431849 100644
--- a/test/code_size/hello_webgl_wasm2js.json
+++ b/test/code_size/hello_webgl_wasm2js.json
@@ -1,10 +1,10 @@
 {
   "a.html": 567,
   "a.html.gz": 379,
-  "a.js": 17454,
-  "a.js.gz": 7873,
+  "a.js": 17434,
+  "a.js.gz": 7876,
   "a.mem": 3171,
   "a.mem.gz": 2713,
-  "total": 21192,
-  "total_gz": 10965
+  "total": 21172,
+  "total_gz": 10968
 }
diff --git a/test/test_browser.py b/test/test_browser.py
index 814f2bec16265..838b689493975 100644
--- a/test/test_browser.py
+++ b/test/test_browser.py
@@ -4151,11 +4151,13 @@ def test_pthread_custom_pthread_main_url(self):
     self.run_browser('test2.html', '/report_result?exit:0')
 
   # Test that if the main thread is performing a futex wait while a pthread needs it to do a proxied operation (before that pthread would wake up the main thread), that it's not a deadlock.
+  @also_with_wasm64
   @requires_threads
   def test_pthread_proxying_in_futex_wait(self):
     self.btest_exit('pthread/test_pthread_proxying_in_futex_wait.cpp', args=['-O3', '-pthread', '-sPTHREAD_POOL_SIZE'])
 
   # Test that sbrk() operates properly in multithreaded conditions
+  @also_with_wasm64
   @requires_threads
   def test_pthread_sbrk(self):
     for aborting_malloc in [0, 1]:
@@ -4181,11 +4183,13 @@ def test_pthread_run_on_main_thread(self):
     self.btest_exit('pthread/test_pthread_run_on_main_thread.cpp', args=['-O3', '-pthread', '-sPTHREAD_POOL_SIZE'])
 
   # Test how a lot of back-to-back called proxying operations behave.
+  @also_with_wasm64
   @requires_threads
   def test_pthread_run_on_main_thread_flood(self):
     self.btest_exit('pthread/test_pthread_run_on_main_thread_flood.cpp', args=['-O3', '-pthread', '-sPTHREAD_POOL_SIZE'])
 
   # Test that it is possible to asynchronously call a JavaScript function on the main thread.
+  @also_with_wasm64
   @requires_threads
   def test_pthread_call_async(self):
     self.btest_exit('pthread/call_async.c', args=['-pthread'])
@@ -4228,6 +4232,7 @@ def test_pthread_global_data_initialization_in_sync_compilation_mode(self):
   def test_pthread_clock_drift(self):
     self.btest_exit('pthread/test_pthread_clock_drift.cpp', args=['-O3', '-pthread', '-sPROXY_TO_PTHREAD'])
 
+  @also_with_wasm64
   @requires_threads
   def test_pthread_utf8_funcs(self):
     self.btest_exit('pthread/test_pthread_utf8_funcs.cpp', args=['-pthread', '-sPTHREAD_POOL_SIZE'])
@@ -4239,16 +4244,19 @@ def test_pthread_wake_all(self):
     self.btest_exit('pthread/test_futex_wake_all.cpp', args=['-O3', '-pthread', '-sINITIAL_MEMORY=64MB'])
 
   # Test that stack base and max correctly bound the stack on pthreads.
+  @also_with_wasm64
   @requires_threads
   def test_pthread_stack_bounds(self):
     self.btest_exit('pthread/test_pthread_stack_bounds.cpp', args=['-pthread'])
 
   # Test that real `thread_local` works.
+  @also_with_wasm64
   @requires_threads
   def test_pthread_tls(self):
     self.btest_exit('pthread/test_pthread_tls.cpp', args=['-sPROXY_TO_PTHREAD', '-pthread'])
 
   # Test that real `thread_local` works in main thread without PROXY_TO_PTHREAD.
+  @also_with_wasm64
   @requires_threads
   def test_pthread_tls_main(self):
     self.btest_exit('pthread/test_pthread_tls_main.cpp', args=['-pthread'])
@@ -4991,6 +4999,7 @@ def test_single_file_worker_js(self):
   # program can run either on the main thread (normal tests) or when we start it in
   # a Worker in this test (in that case, both the main application thread and the worker threads
   # are all inside Web Workers).
+  @also_with_wasm64
   @requires_threads
   def test_pthreads_started_in_worker(self):
     self.set_setting('EXIT_RUNTIME')
@@ -5120,6 +5129,7 @@ def test_emscripten_set_interval(self):
     self.btest_exit('emscripten_set_interval.c', args=['-pthread', '-sPROXY_TO_PTHREAD'])
 
   # Test emscripten_performance_now() and emscripten_date_now()
+  @also_with_wasm64
   @requires_threads
   def test_emscripten_performance_now(self):
     self.btest('emscripten_performance_now.c', '0', args=['-pthread', '-sPROXY_TO_PTHREAD'])