diff --git a/lib/matplotlib/backends/backend_webagg.py b/lib/matplotlib/backends/backend_webagg.py
index 137cda2aa009..fad6de97012d 100644
--- a/lib/matplotlib/backends/backend_webagg.py
+++ b/lib/matplotlib/backends/backend_webagg.py
@@ -45,12 +45,14 @@ class ServerThread(threading.Thread):
     def run(self):
         tornado.ioloop.IOLoop.instance().start()
 
+
 webagg_server_thread = ServerThread()
 
 
 class FigureCanvasWebAgg(core.FigureCanvasWebAggCore):
     def show(self):
         # show the figure window
+        global show  # placates pyflakes: created by @_Backend.export below
         show()
 
     def new_timer(self, *args, **kwargs):
diff --git a/lib/matplotlib/backends/backend_wx.py b/lib/matplotlib/backends/backend_wx.py
index 6fbc6b716f6c..ed61e14af9c7 100644
--- a/lib/matplotlib/backends/backend_wx.py
+++ b/lib/matplotlib/backends/backend_wx.py
@@ -1456,6 +1456,7 @@ def updateButtonText(self, lst):
 @cbook.deprecated("2.2")
 class SubplotToolWX(wx.Frame):
     def __init__(self, targetfig):
+        global FigureManager  # placates pyflakes: created by @_Backend.export
         wx.Frame.__init__(self, None, -1, "Configure subplots")
 
         toolfig = Figure((6, 3))
@@ -1519,6 +1520,7 @@ def pan(self, *args):
         NavigationToolbar2.pan(self, *args)
 
     def configure_subplots(self, evt):
+        global FigureManager  # placates pyflakes: created by @_Backend.export
         frame = wx.Frame(None, -1, "Configure subplots")
 
         toolfig = Figure((6, 3))