diff --git a/eventlet/hubs/hub.py b/eventlet/hubs/hub.py
index db55958..c27b81f 100644
--- a/eventlet/hubs/hub.py
+++ b/eventlet/hubs/hub.py
@@ -21,7 +21,7 @@ else:
 
 import eventlet.hubs
 from eventlet.hubs import timer
-from eventlet.support import greenlets as greenlet, clear_sys_exc_info
+from eventlet.support import greenlets as greenlet
 try:
     from monotonic import monotonic
 except ImportError:
@@ -309,7 +309,6 @@ class BaseHub(object):
                 cur.parent = self.greenlet
         except ValueError:
             pass  # gets raised if there is a greenlet parent cycle
-        clear_sys_exc_info()
         return self.greenlet.switch()
 
     def squelch_exception(self, fileno, exc_info):
@@ -397,13 +396,11 @@ class BaseHub(object):
         if self.debug_exceptions:
             traceback.print_exception(*exc_info)
             sys.stderr.flush()
-            clear_sys_exc_info()
 
     def squelch_timer_exception(self, timer, exc_info):
         if self.debug_exceptions:
             traceback.print_exception(*exc_info)
             sys.stderr.flush()
-            clear_sys_exc_info()
 
     def add_timer(self, timer):
         scheduled_time = self.clock() + timer.seconds
@@ -478,7 +475,6 @@ class BaseHub(object):
                 raise
             except:
                 self.squelch_timer_exception(timer, sys.exc_info())
-                clear_sys_exc_info()
 
     # for debugging:
 
diff --git a/eventlet/hubs/kqueue.py b/eventlet/hubs/kqueue.py
index bad4a87..8438805 100644
--- a/eventlet/hubs/kqueue.py
+++ b/eventlet/hubs/kqueue.py
@@ -109,4 +109,3 @@ class Hub(hub.BaseHub):
                 raise
             except:
                 self.squelch_exception(fileno, sys.exc_info())
-                support.clear_sys_exc_info()
diff --git a/eventlet/hubs/poll.py b/eventlet/hubs/poll.py
index 1bbd401..d3f9c6a 100644
--- a/eventlet/hubs/poll.py
+++ b/eventlet/hubs/poll.py
@@ -113,7 +113,6 @@ class Hub(hub.BaseHub):
                 raise
             except:
                 self.squelch_exception(fileno, sys.exc_info())
-                support.clear_sys_exc_info()
 
         if self.debug_blocking:
             self.block_detect_post()
diff --git a/eventlet/hubs/selects.py b/eventlet/hubs/selects.py
index 0ead5b8..0386a1e 100644
--- a/eventlet/hubs/selects.py
+++ b/eventlet/hubs/selects.py
@@ -61,4 +61,3 @@ class Hub(hub.BaseHub):
                     raise
                 except:
                     self.squelch_exception(fileno, sys.exc_info())
-                    support.clear_sys_exc_info()
diff --git a/eventlet/support/__init__.py b/eventlet/support/__init__.py
index 43bac91..b1c1607 100644
--- a/eventlet/support/__init__.py
+++ b/eventlet/support/__init__.py
@@ -30,15 +30,6 @@ def get_errno(exc):
         return None
 
 
-if sys.version_info[0] < 3 and not greenlets.preserves_excinfo:
-    from sys import exc_clear as clear_sys_exc_info
-else:
-    def clear_sys_exc_info():
-        """No-op In py3k.
-        Exception information is not visible outside of except statements.
-        sys.exc_clear became obsolete and removed."""
-        pass
-
 if sys.version_info[0] < 3:
     def bytes_to_str(b, encoding='ascii'):
         return b
diff --git a/eventlet/support/greenlets.py b/eventlet/support/greenlets.py
index d4e1793..b939328 100644
--- a/eventlet/support/greenlets.py
+++ b/eventlet/support/greenlets.py
@@ -1,8 +1,4 @@
-import distutils.version
-
 import greenlet
 getcurrent = greenlet.greenlet.getcurrent
 GreenletExit = greenlet.greenlet.GreenletExit
-preserves_excinfo = (distutils.version.LooseVersion(greenlet.__version__)
-                     >= distutils.version.LooseVersion('0.3.2'))
 greenlet = greenlet.greenlet
diff --git a/setup.py b/setup.py
index a8f4684..9b927e0 100644
--- a/setup.py
+++ b/setup.py
@@ -19,7 +19,7 @@ setuptools.setup(
     packages=setuptools.find_packages(exclude=['benchmarks', 'tests', 'tests.*']),
     install_requires=(
         'dnspython >= 1.15.0',
-        'greenlet >= 0.3',
+        'greenlet >= 1.0',
         'monotonic >= 1.4;python_version<"3.5"',
         'six >= 1.10.0',
     ),
diff --git a/tests/hub_test.py b/tests/hub_test.py
index a531b75..05c0024 100644
--- a/tests/hub_test.py
+++ b/tests/hub_test.py
@@ -194,7 +194,6 @@ class TestExceptionInMainloop(tests.LimitedTestCase):
 
 class TestExceptionInGreenthread(tests.LimitedTestCase):
 
-    @skip_unless(greenlets.preserves_excinfo)
     def test_exceptionpreservation(self):
         # events for controlling execution order
         gt1event = eventlet.Event()
diff --git a/tests/test__refcount.py b/tests/test__refcount.py
index 1090a1f..5c1c002 100644
--- a/tests/test__refcount.py
+++ b/tests/test__refcount.py
@@ -57,7 +57,6 @@ def run_interaction(run_client):
 
 def run_and_check(run_client):
     w = run_interaction(run_client=run_client)
-    # clear_sys_exc_info()
     gc.collect()
     fd = w()
     print('run_and_check: weakref fd:', fd)