diff --git a/lib/matplotlib/backends/backend_nbagg.py b/lib/matplotlib/backends/backend_nbagg.py
index 712f45735940..f4ee4b1179f3 100644
--- a/lib/matplotlib/backends/backend_nbagg.py
+++ b/lib/matplotlib/backends/backend_nbagg.py
@@ -14,7 +14,7 @@
from matplotlib import is_interactive
from matplotlib._pylab_helpers import Gcf
-from matplotlib.backend_bases import _Backend, NavigationToolbar2
+from matplotlib.backend_bases import _Backend, CloseEvent, NavigationToolbar2
from .backend_webagg_core import (
FigureCanvasWebAggCore, FigureManagerWebAgg, NavigationToolbar2WebAgg)
from .backend_webagg_core import ( # noqa: F401 # pylint: disable=W0611
@@ -149,7 +149,7 @@ def clearup_closed(self):
if socket.is_open()}
if len(self.web_sockets) == 0:
- self.canvas.close_event()
+ CloseEvent("close_event", self.canvas)._process()
def remove_comm(self, comm_id):
self.web_sockets = {socket for socket in self.web_sockets
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