diff --git a/test/test_core.py b/test/test_core.py
index 82c38be7312c2..5ad94500d7b07 100644
--- a/test/test_core.py
+++ b/test/test_core.py
@@ -9636,22 +9636,27 @@ def test_syscall_intercept(self):
     self.do_core_test('test_syscall_intercept.c')
 
   @requires_pthreads
+  @no_wasmfs('https://github.com/emscripten-core/emscripten/issues/26736')
   def test_select_blocking(self):
     self.do_runf('core/test_select_blocking.c', cflags=['-pthread', '-sPROXY_TO_PTHREAD=1', '-sEXIT_RUNTIME=1'])
 
   @requires_pthreads
+  @no_wasmfs('https://github.com/emscripten-core/emscripten/issues/26736')
   def test_pselect_blocking(self):
     self.do_runf('core/test_pselect_blocking.c', cflags=['-pthread', '-sPROXY_TO_PTHREAD=1', '-sEXIT_RUNTIME=1'])
 
   @requires_pthreads
+  @no_wasmfs('https://github.com/emscripten-core/emscripten/issues/26736')
   def test_poll_blocking(self):
     self.do_runf('core/test_poll_blocking.c', cflags=['-pthread', '-sPROXY_TO_PTHREAD=1', '-sEXIT_RUNTIME=1'])
 
   @requires_pthreads
+  @no_wasmfs('https://github.com/emscripten-core/emscripten/issues/26736')
   def test_ppoll_blocking(self):
     self.do_runf('core/test_ppoll_blocking.c', cflags=['-pthread', '-sPROXY_TO_PTHREAD=1', '-sEXIT_RUNTIME=1'])
 
   @with_asyncify_and_jspi
+  @no_wasmfs('https://github.com/emscripten-core/emscripten/issues/26736')
   def test_poll_blocking_asyncify(self):
     if self.get_setting('JSPI') and engine_is_v8(self.get_current_js_engine()):
       self.skipTest('test requires setTimeout which is not supported under v8')