diff --git a/Lib/inspect.py b/Lib/inspect.py
index 497169dacb52e1..c93d0a5ae40f43 100644
--- a/Lib/inspect.py
+++ b/Lib/inspect.py
@@ -401,13 +401,13 @@ def isgeneratorfunction(obj):
     return _has_code_flag(obj, CO_GENERATOR)
 
 # A marker for markcoroutinefunction and iscoroutinefunction.
-_is_coroutine_marker = object()
+_is_coroutine_mark = object()
 
 def _has_coroutine_mark(f):
     while ismethod(f):
         f = f.__func__
     f = functools._unwrap_partial(f)
-    return getattr(f, "_is_coroutine_marker", None) is _is_coroutine_marker
+    return getattr(f, "_is_coroutine_marker", None) is _is_coroutine_mark
 
 def markcoroutinefunction(func):
     """
@@ -415,7 +415,7 @@ def markcoroutinefunction(func):
     """
     if hasattr(func, '__func__'):
         func = func.__func__
-    func._is_coroutine_marker = _is_coroutine_marker
+    func._is_coroutine_marker = _is_coroutine_mark
     return func
 
 def iscoroutinefunction(obj):
diff --git a/Lib/test/test_inspect/test_inspect.py b/Lib/test/test_inspect/test_inspect.py
index 4a6d2b3e366ce0..1302f962856f75 100644
--- a/Lib/test/test_inspect/test_inspect.py
+++ b/Lib/test/test_inspect/test_inspect.py
@@ -199,6 +199,7 @@ def test_iscoroutine(self):
             inspect.iscoroutinefunction(
                 functools.partial(functools.partial(
                     gen_coroutine_function_example))))
+        self.assertFalse(inspect.iscoroutinefunction(inspect))
         self.assertFalse(inspect.iscoroutine(gen_coro))
 
         self.assertTrue(