diff --git a/Lib/platform.py b/Lib/platform.py
index 20f9817f4f..bcf96874c0 100755
--- a/Lib/platform.py
+++ b/Lib/platform.py
@@ -748,7 +748,7 @@ def _syscmd_uname(option, default=''):
 
     """ Interface to the system's uname command.
     """
-    if sys.platform in ('dos', 'win32', 'win16'):
+    if sys.platform in ('dos', 'win32', 'win16', 'emscripten'):
         # XXX Others too ?
         return default
     try:
@@ -771,7 +771,7 @@ def _syscmd_file(target, default=''):
         default in case the command should fail.
 
     """
-    if sys.platform in ('dos', 'win32', 'win16'):
+    if sys.platform in ('dos', 'win32', 'win16', 'emscripten'):
         # XXX Others too ?
         return default
     target = _follow_symlinks(target)
diff --git a/Lib/test/support/script_helper.py b/Lib/test/support/script_helper.py
index 64b25aab80..7cf67fd149 100644
--- a/Lib/test/support/script_helper.py
+++ b/Lib/test/support/script_helper.py
@@ -9,6 +9,7 @@ import os.path
 import subprocess
 import py_compile
 import zipfile
+import unittest
 
 from importlib.util import source_from_cache
 from test.support import make_legacy_pyc, strip_python_stderr
@@ -34,6 +35,8 @@ def interpreter_requires_environment():
     situation.  PYTHONPATH or PYTHONUSERSITE are other common environment
     variables that might impact whether or not the interpreter can start.
     """
+    raise unittest.SkipTest('no subprocess')
+
     global __cached_interp_requires_environment
     if __cached_interp_requires_environment is None:
         # If PYTHONHOME is set, assume that we need it
@@ -172,6 +175,8 @@ def spawn_python(*args, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, **kw):
     kw is extra keyword args to pass to subprocess.Popen. Returns a Popen
     object.
     """
+    raise unittest.SkipTest("no subprocess")
+
     cmd_line = [sys.executable]
     if not interpreter_requires_environment():
         cmd_line.append('-E')
diff --git a/Lib/test/test_code.py b/Lib/test/test_code.py
index 55faf4c427..b2201c09e7 100644
--- a/Lib/test/test_code.py
+++ b/Lib/test/test_code.py
@@ -104,7 +104,10 @@ consts: ('None',)
 
 import inspect
 import sys
-import threading
+try:
+    import threading
+except ImportError:
+    import dummy_threading as threading
 import unittest
 import weakref
 try:
diff --git a/Lib/test/test_import/__init__.py b/Lib/test/test_import/__init__.py
index 1fc4de11e1..e6c91707ae 100644
--- a/Lib/test/test_import/__init__.py
+++ b/Lib/test/test_import/__init__.py
@@ -10,7 +10,10 @@ import py_compile
 import random
 import stat
 import sys
-import threading
+try:
+    import threading
+except ImportError:
+    import dummy_threading as threading
 import time
 import unittest
 import unittest.mock as mock
diff --git a/Lib/test/test_gzip.py b/Lib/test/test_gzip.py
--- a/Lib/test/test_gzip.py
+++ b/Lib/test/test_gzip.py
@@ -13,6 +13,7 @@
 from test import support
 from test.support import _4G, bigmemtest
 from test.support.script_helper import assert_python_ok
+import unittest
 
 gzip = support.import_module('gzip')
 
@@ -691,6 +692,7 @@
     data = b'This is a simple test with gzip'
 
     def test_decompress_stdin_stdout(self):
+        raise unittest.SkipTest('no subprocess')
         with io.BytesIO() as bytes_io:
             with gzip.GzipFile(fileobj=bytes_io, mode='wb') as gzip_file:
                 gzip_file.write(self.data)
@@ -727,6 +729,7 @@
 
     @create_and_remove_directory(TEMPDIR)
     def test_compress_stdin_outfile(self):
+        raise unittest.SkipTest('no subprocess')
         args = sys.executable, '-m', 'gzip'
         with Popen(args, stdin=PIPE, stdout=PIPE, stderr=PIPE) as proc:
             out, err = proc.communicate(self.data)