diff --git a/eventlet/green/http/client.py b/eventlet/green/http/client.py
index e4bd2ad..125c0bf 100644
--- a/eventlet/green/http/client.py
+++ b/eventlet/green/http/client.py
@@ -1447,6 +1447,18 @@ try:
 except ImportError:
     pass
 else:
+    def _create_https_context(http_version):
+        # Function also used by urllib.request to be able to set the check_hostname
+        # attribute on a context object.
+        context = ssl._create_default_https_context()
+        # send ALPN extension to indicate HTTP/1.1 protocol
+        if http_version == 11:
+            context.set_alpn_protocols(['http/1.1'])
+        # enable PHA for TLS 1.3 connections if available
+        if context.post_handshake_auth is not None:
+            context.post_handshake_auth = True
+        return context
+
     class HTTPSConnection(HTTPConnection):
         "This class allows communication via SSL."
 
@@ -1463,13 +1475,9 @@ else:
             self.key_file = key_file
             self.cert_file = cert_file
             if context is None:
-                context = ssl._create_default_https_context()
-            will_verify = context.verify_mode != ssl.CERT_NONE
-            if check_hostname is None:
-                check_hostname = context.check_hostname
-            if check_hostname and not will_verify:
-                raise ValueError("check_hostname needs a SSL context with "
-                                 "either CERT_OPTIONAL or CERT_REQUIRED")
+                context = _create_https_context(self._http_vsn)
+            if check_hostname is not None:
+                context.check_hostname = check_hostname
             if key_file or cert_file:
                 context.load_cert_chain(cert_file, key_file)
             self._context = context
diff --git a/eventlet/green/ssl.py b/eventlet/green/ssl.py
index b42ddaa..74b6c46 100644
--- a/eventlet/green/ssl.py
+++ b/eventlet/green/ssl.py
@@ -22,21 +22,17 @@ __patched__ = [
     'create_default_context', '_create_default_https_context']
 
 _original_sslsocket = __ssl.SSLSocket
-_original_wrap_socket = __ssl.wrap_socket
 _original_sslcontext = getattr(__ssl, 'SSLContext', None)
 _is_under_py_3_7 = sys.version_info < (3, 7)
 
 
 @contextmanager
 def _original_ssl_context(*args, **kwargs):
-    tmp_sslcontext = _original_wrap_socket.__globals__.get('SSLContext', None)
     tmp_sslsocket = _original_sslsocket._create.__globals__.get('SSLSocket', None)
     _original_sslsocket._create.__globals__['SSLSocket'] = _original_sslsocket
-    _original_wrap_socket.__globals__['SSLContext'] = _original_sslcontext
     try:
         yield
     finally:
-        _original_wrap_socket.__globals__['SSLContext'] = tmp_sslcontext
         _original_sslsocket._create.__globals__['SSLSocket'] = tmp_sslsocket
 
 
@@ -76,16 +72,21 @@ class GreenSSLSocket(_original_sslsocket):
                         session=kw.get('session'),
                     )
                 else:
-                    ret = _original_wrap_socket(
+                    context = _original_sslcontext(protocol=ssl_version)
+                    context.options |= cert_reqs
+                    if certfile or keyfile:
+                        context.load_cert_chain(
+                            certfile=certfile,
+                            keyfile=keyfile,
+                        )
+                    if ca_certs:
+                        context.load_verify_locations(ca_certs)
+                    if ciphers := kw.get('ciphers'):
+                        context.set_ciphers(ciphers)
+                    ret = context.wrap_socket(
                         sock=sock.fd,
-                        keyfile=keyfile,
-                        certfile=certfile,
                         server_side=server_side,
-                        cert_reqs=cert_reqs,
-                        ssl_version=ssl_version,
-                        ca_certs=ca_certs,
                         do_handshake_on_connect=False,
-                        ciphers=kw.get('ciphers'),
                     )
             ret.keyfile = keyfile
             ret.certfile = certfile
diff --git a/eventlet/green/thread.py b/eventlet/green/thread.py
index e26f6b3..7bcb563 100644
--- a/eventlet/green/thread.py
+++ b/eventlet/green/thread.py
@@ -113,3 +113,6 @@ if hasattr(__thread, 'stack_size'):
             # this thread will suffer
 
 from eventlet.corolocal import local as _local
+
+if hasattr(__thread, 'daemon_threads_allowed'):
+    daemon_threads_allowed = __thread.daemon_threads_allowed
diff --git a/tests/dagpool_test.py b/tests/dagpool_test.py
index fdc23e7..dcd7dd8 100644
--- a/tests/dagpool_test.py
+++ b/tests/dagpool_test.py
@@ -191,14 +191,14 @@ def test_init():
         with check_no_suspend():
             results = pool.waitall()
         # with no spawn() or post(), waitall() returns preload data
-        assert_equals(results, dict(a=1, b=2, c=3))
+        assert_equal(results, dict(a=1, b=2, c=3))
 
         # preload sequence of pairs
         pool = DAGPool([("d", 4), ("e", 5), ("f", 6)])
         # this must not hang
         with check_no_suspend():
             results = pool.waitall()
-        assert_equals(results, dict(d=4, e=5, f=6))
+        assert_equal(results, dict(d=4, e=5, f=6))
 
 
 def test_wait_each_empty():
@@ -216,10 +216,10 @@ def test_wait_each_preload():
         with check_no_suspend():
             # wait_each() may deliver in arbitrary order; collect into a dict
             # for comparison
-            assert_equals(dict(pool.wait_each("abc")), dict(a=1, b=2, c=3))
+            assert_equal(dict(pool.wait_each("abc")), dict(a=1, b=2, c=3))
 
             # while we're at it, test wait() for preloaded keys
-            assert_equals(pool.wait("bc"), dict(b=2, c=3))
+            assert_equal(pool.wait("bc"), dict(b=2, c=3))
 
 
 def post_each(pool, capture):
@@ -257,7 +257,7 @@ def test_wait_posted():
     eventlet.spawn(post_each, pool, capture)
     gotten = pool.wait("bcdefg")
     capture.add("got all")
-    assert_equals(gotten,
+    assert_equal(gotten,
                   dict(b=2, c=3,
                        d="dval", e="eval",
                        f="fval", g="gval"))
@@ -285,7 +285,7 @@ def test_spawn_collision_spawn():
     pool = DAGPool()
     pool.spawn("a", (), lambda key, results: "aval")
     # hasn't yet even started
-    assert_equals(pool.get("a"), None)
+    assert_equal(pool.get("a"), None)
     with assert_raises(Collision):
         # Attempting to spawn again with same key should collide even if the
         # first spawned greenthread hasn't yet had a chance to run.
@@ -293,7 +293,7 @@ def test_spawn_collision_spawn():
     # now let the spawned eventlet run
     eventlet.sleep(0)
     # should have finished
-    assert_equals(pool.get("a"), "aval")
+    assert_equal(pool.get("a"), "aval")
     with assert_raises(Collision):
         # Attempting to spawn with same key collides even when the greenthread
         # has completed.
@@ -324,60 +324,60 @@ def test_spawn_multiple():
     capture.step()
     # but none of them has yet produced a result
     for k in "defgh":
-        assert_equals(pool.get(k), None)
-    assert_equals(set(pool.keys()), set("abc"))
-    assert_equals(dict(pool.items()), dict(a=1, b=2, c=3))
-    assert_equals(pool.running(), 5)
-    assert_equals(set(pool.running_keys()), set("defgh"))
-    assert_equals(pool.waiting(), 1)
-    assert_equals(pool.waiting_for(), dict(h=set("defg")))
-    assert_equals(pool.waiting_for("d"), set())
-    assert_equals(pool.waiting_for("c"), set())
+        assert_equal(pool.get(k), None)
+    assert_equal(set(pool.keys()), set("abc"))
+    assert_equal(dict(pool.items()), dict(a=1, b=2, c=3))
+    assert_equal(pool.running(), 5)
+    assert_equal(set(pool.running_keys()), set("defgh"))
+    assert_equal(pool.waiting(), 1)
+    assert_equal(pool.waiting_for(), dict(h=set("defg")))
+    assert_equal(pool.waiting_for("d"), set())
+    assert_equal(pool.waiting_for("c"), set())
     with assert_raises(KeyError):
         pool.waiting_for("j")
-    assert_equals(pool.waiting_for("h"), set("defg"))
+    assert_equal(pool.waiting_for("h"), set("defg"))
 
     # let one of the upstream greenthreads complete
     events["f"].send("fval")
     spin()
     capture.step()
-    assert_equals(pool.get("f"), "fval")
-    assert_equals(set(pool.keys()), set("abcf"))
-    assert_equals(dict(pool.items()), dict(a=1, b=2, c=3, f="fval"))
-    assert_equals(pool.running(), 4)
-    assert_equals(set(pool.running_keys()), set("degh"))
-    assert_equals(pool.waiting(), 1)
-    assert_equals(pool.waiting_for("h"), set("deg"))
+    assert_equal(pool.get("f"), "fval")
+    assert_equal(set(pool.keys()), set("abcf"))
+    assert_equal(dict(pool.items()), dict(a=1, b=2, c=3, f="fval"))
+    assert_equal(pool.running(), 4)
+    assert_equal(set(pool.running_keys()), set("degh"))
+    assert_equal(pool.waiting(), 1)
+    assert_equal(pool.waiting_for("h"), set("deg"))
 
     # now two others
     events["e"].send("eval")
     events["g"].send("gval")
     spin()
     capture.step()
-    assert_equals(pool.get("e"), "eval")
-    assert_equals(pool.get("g"), "gval")
-    assert_equals(set(pool.keys()), set("abcefg"))
-    assert_equals(dict(pool.items()),
+    assert_equal(pool.get("e"), "eval")
+    assert_equal(pool.get("g"), "gval")
+    assert_equal(set(pool.keys()), set("abcefg"))
+    assert_equal(dict(pool.items()),
                   dict(a=1, b=2, c=3, e="eval", f="fval", g="gval"))
-    assert_equals(pool.running(), 2)
-    assert_equals(set(pool.running_keys()), set("dh"))
-    assert_equals(pool.waiting(), 1)
-    assert_equals(pool.waiting_for("h"), set("d"))
+    assert_equal(pool.running(), 2)
+    assert_equal(set(pool.running_keys()), set("dh"))
+    assert_equal(pool.waiting(), 1)
+    assert_equal(pool.waiting_for("h"), set("d"))
 
     # last one
     events["d"].send("dval")
     # make sure both pool greenthreads get a chance to run
     spin()
     capture.step()
-    assert_equals(pool.get("d"), "dval")
-    assert_equals(set(pool.keys()), set("abcdefgh"))
-    assert_equals(dict(pool.items()),
+    assert_equal(pool.get("d"), "dval")
+    assert_equal(set(pool.keys()), set("abcdefgh"))
+    assert_equal(dict(pool.items()),
                   dict(a=1, b=2, c=3,
                        d="dval", e="eval", f="fval", g="gval", h="hval"))
-    assert_equals(pool.running(), 0)
+    assert_equal(pool.running(), 0)
     assert_false(pool.running_keys())
-    assert_equals(pool.waiting(), 0)
-    assert_equals(pool.waiting_for("h"), set())
+    assert_equal(pool.waiting(), 0)
+    assert_equal(pool.waiting_for("h"), set())
 
     capture.validate([
         ["h got b", "h got c"],
@@ -432,13 +432,13 @@ def test_spawn_many():
     spin()
     # verify that e completed (also that post(key) within greenthread
     # overrides implicit post of return value, which would be None)
-    assert_equals(pool.get("e"), "e")
+    assert_equal(pool.get("e"), "e")
 
     # With the dependency graph shown above, it is not guaranteed whether b or
     # c will complete first. Handle either case.
     sequence = capture.sequence[:]
     sequence[1:3] = [set([sequence[1].pop(), sequence[2].pop()])]
-    assert_equals(sequence,
+    assert_equal(sequence,
                   [set(["a done"]),
                    set(["b done", "c done"]),
                    set(["d done"]),
@@ -466,7 +466,7 @@ def test_wait_each_all():
     for pos in range(len(keys)):
         # next value from wait_each()
         k, v = next(each)
-        assert_equals(k, keys[pos])
+        assert_equal(k, keys[pos])
         # advance every pool greenlet as far as it can go
         spin()
         # everything from keys[:pos+1] should have a value by now
@@ -494,7 +494,7 @@ def test_kill():
     pool.kill("a")
     # didn't run
     spin()
-    assert_equals(pool.get("a"), None)
+    assert_equal(pool.get("a"), None)
     # killing it forgets about it
     with assert_raises(KeyError):
         pool.kill("a")
@@ -505,7 +505,7 @@ def test_kill():
     with assert_raises(KeyError):
         pool.kill("a")
     # verify it ran to completion
-    assert_equals(pool.get("a"), 2)
+    assert_equal(pool.get("a"), 2)
 
 
 def test_post_collision_preload():
@@ -533,7 +533,7 @@ def test_post_collision_spawn():
     pool.kill("a")
     # now we can post
     pool.post("a", 3)
-    assert_equals(pool.get("a"), 3)
+    assert_equal(pool.get("a"), 3)
 
     pool = DAGPool()
     pool.spawn("a", (), lambda key, result: 4)
@@ -553,10 +553,10 @@ def test_post_replace():
     pool = DAGPool()
     pool.post("a", 1)
     pool.post("a", 2, replace=True)
-    assert_equals(pool.get("a"), 2)
-    assert_equals(dict(pool.wait_each("a")), dict(a=2))
-    assert_equals(pool.wait("a"), dict(a=2))
-    assert_equals(pool["a"], 2)
+    assert_equal(pool.get("a"), 2)
+    assert_equal(dict(pool.wait_each("a")), dict(a=2))
+    assert_equal(pool.wait("a"), dict(a=2))
+    assert_equal(pool["a"], 2)
 
 
 def waitfor(capture, pool, key):
@@ -598,10 +598,10 @@ def test_waitall_exc():
     try:
         pool.waitall()
     except PropagateError as err:
-        assert_equals(err.key, "a")
+        assert_equal(err.key, "a")
         assert isinstance(err.exc, BogusError), \
             "exc attribute is {0}, not BogusError".format(err.exc)
-        assert_equals(str(err.exc), "bogus")
+        assert_equal(str(err.exc), "bogus")
         msg = str(err)
         assert_in("PropagateError(a)", msg)
         assert_in("BogusError", msg)
@@ -616,14 +616,14 @@ def test_propagate_exc():
     try:
         pool["c"]
     except PropagateError as errc:
-        assert_equals(errc.key, "c")
+        assert_equal(errc.key, "c")
         errb = errc.exc
-        assert_equals(errb.key, "b")
+        assert_equal(errb.key, "b")
         erra = errb.exc
-        assert_equals(erra.key, "a")
+        assert_equal(erra.key, "a")
         assert isinstance(erra.exc, BogusError), \
             "exc attribute is {0}, not BogusError".format(erra.exc)
-        assert_equals(str(erra.exc), "bogus")
+        assert_equal(str(erra.exc), "bogus")
         msg = str(errc)
         assert_in("PropagateError(a)", msg)
         assert_in("PropagateError(b)", msg)
@@ -681,13 +681,13 @@ def test_post_get_exc():
             pass
 
     # wait_each_success() filters
-    assert_equals(dict(pool.wait_each_success()), dict(a=bogua))
-    assert_equals(dict(pool.wait_each_success("ab")), dict(a=bogua))
-    assert_equals(dict(pool.wait_each_success("a")), dict(a=bogua))
-    assert_equals(dict(pool.wait_each_success("b")), {})
+    assert_equal(dict(pool.wait_each_success()), dict(a=bogua))
+    assert_equal(dict(pool.wait_each_success("ab")), dict(a=bogua))
+    assert_equal(dict(pool.wait_each_success("a")), dict(a=bogua))
+    assert_equal(dict(pool.wait_each_success("b")), {})
 
     # wait_each_exception() filters the other way
-    assert_equals(dict(pool.wait_each_exception()), dict(b=bogub))
-    assert_equals(dict(pool.wait_each_exception("ab")), dict(b=bogub))
-    assert_equals(dict(pool.wait_each_exception("a")), {})
-    assert_equals(dict(pool.wait_each_exception("b")), dict(b=bogub))
+    assert_equal(dict(pool.wait_each_exception()), dict(b=bogub))
+    assert_equal(dict(pool.wait_each_exception("ab")), dict(b=bogub))
+    assert_equal(dict(pool.wait_each_exception("a")), {})
+    assert_equal(dict(pool.wait_each_exception("b")), dict(b=bogub))
diff --git a/tests/tpool_test.py b/tests/tpool_test.py
index 1a730dc..ffd947b 100644
--- a/tests/tpool_test.py
+++ b/tests/tpool_test.py
@@ -315,11 +315,11 @@ class TpoolLongTests(tests.LimitedTestCase):
 
     @tests.skip_with_pyevent
     def test_a_buncha_stuff(self):
-        assert_ = self.assert_
+        assertTrue = self.assertTrue
 
         class Dummy(object):
             def foo(self, when, token=None):
-                assert_(token is not None)
+                assertTrue(token is not None)
                 time.sleep(random.random() / 200.0)
                 return token
 
@@ -359,7 +359,7 @@ class TpoolLongTests(tests.LimitedTestCase):
         first_created = middle_objs - initial_objs
         gc.collect()
         second_created = len(gc.get_objects()) - middle_objs
-        self.assert_(second_created - first_created < 10,
+        self.assertTrue(second_created - first_created < 10,
                      "first loop: %s, second loop: %s" % (first_created,
                                                           second_created))
         tpool.killall()