diff --git a/ipympl/backend_nbagg.py b/ipympl/backend_nbagg.py
index 0b083df8..57127590 100644
--- a/ipympl/backend_nbagg.py
+++ b/ipympl/backend_nbagg.py
@@ -119,7 +119,7 @@ def connection_info():
         return '\n'.join(result)
 
 
-class Toolbar(DOMWidget, NavigationToolbar2WebAgg):
+class Toolbar(NavigationToolbar2WebAgg, DOMWidget):
 
     _model_module = Unicode('jupyter-matplotlib').tag(sync=True)
     _model_module_version = Unicode(js_semver).tag(sync=True)
@@ -147,8 +147,8 @@ class Toolbar(DOMWidget, NavigationToolbar2WebAgg):
     _current_action = Enum(values=['pan', 'zoom', ''], default_value='').tag(sync=True)
 
     def __init__(self, canvas, *args, **kwargs):
+        NavigationToolbar2WebAgg.__init__(self, canvas)
         DOMWidget.__init__(self, *args, **kwargs)
-        NavigationToolbar2WebAgg.__init__(self, canvas, *args, **kwargs)
 
         self.on_msg(self.canvas._handle_message)
 
diff --git a/tests/test_backend_nbagg.py b/tests/test_backend_nbagg.py
new file mode 100644
index 00000000..ae6c7c8e
--- /dev/null
+++ b/tests/test_backend_nbagg.py
@@ -0,0 +1,16 @@
+import warnings
+
+import matplotlib
+
+
+def test_toolbar_initialization_does_not_warn():
+    """Toolbar initialization should not pass canvas through Traitlets."""
+    matplotlib.use("module://ipympl.backend_nbagg")
+    import matplotlib.pyplot as plt
+
+    with warnings.catch_warnings():
+        warnings.simplefilter("error", DeprecationWarning)
+        fig, ax = plt.subplots()
+
+    assert fig.canvas.toolbar is not None
+    plt.close(fig)