diff --git a/geopandas/array.py b/geopandas/array.py
index 2b3f2ea..306fc7d 100644
--- a/geopandas/array.py
+++ b/geopandas/array.py
@@ -1035,7 +1035,7 @@ class GeometryArray(ExtensionArray):
                 ovalues = [param] * len(self)
             return ovalues
 
-        if isinstance(other, (pd.Series, pd.Index)):
+        if isinstance(other, (pd.Series, pd.Index, pd.DataFrame)):
             # rely on pandas to unbox and dispatch to us
             return NotImplemented
 
diff --git a/geopandas/tests/test_plotting.py b/geopandas/tests/test_plotting.py
index 096bc3d..2308638 100644
--- a/geopandas/tests/test_plotting.py
+++ b/geopandas/tests/test_plotting.py
@@ -188,7 +188,7 @@ class TestPointPlotting:
         # the colorbar matches the Point colors
         ax = self.df.plot(column="values", cmap="RdYlGn", legend=True)
         point_colors = ax.collections[0].get_facecolors()
-        cbar_colors = ax.get_figure().axes[1].collections[0].get_facecolors()
+        cbar_colors = ax.get_figure().axes[1].collections[-1].get_facecolors()
         # first point == bottom of colorbar
         np.testing.assert_array_equal(point_colors[0], cbar_colors[0])
         # last point == top of colorbar
@@ -198,7 +198,7 @@ class TestPointPlotting:
         # the colorbar matches the Point colors
         ax = self.df.plot(column="values", categorical=True, legend=True)
         point_colors = ax.collections[0].get_facecolors()
-        cbar_colors = ax.get_legend().axes.collections[0].get_facecolors()
+        cbar_colors = ax.get_legend().axes.collections[-1].get_facecolors()
         # first point == bottom of colorbar
         np.testing.assert_array_equal(point_colors[0], cbar_colors[0])
         # last point == top of colorbar
@@ -211,7 +211,7 @@ class TestPointPlotting:
         )
         ax = self.df[1:].plot(column="exp", cmap="RdYlGn", legend=True, norm=norm)
         point_colors = ax.collections[0].get_facecolors()
-        cbar_colors = ax.get_figure().axes[1].collections[0].get_facecolors()
+        cbar_colors = ax.get_figure().axes[1].collections[-1].get_facecolors()
         # first point == bottom of colorbar
         np.testing.assert_array_equal(point_colors[0], cbar_colors[0])
         # last point == top of colorbar