matplotlib
diff --git a/‎examples/axes_grid/simple_axisline4.py
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diff --git a/‎lib/mpl_toolkits/axes_grid1/anchored_artists.py
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diff --git a/‎lib/mpl_toolkits/axes_grid1/inset_locator.py
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+2-2Lines changed: 2 additions & 2 deletions b/‎lib/mpl_toolkits/axes_grid1/inset_locator.py
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diff --git a/‎lib/mpl_toolkits/tests/baseline_images/test_axes_grid1/inset_locator.png
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diff --git a/‎lib/mpl_toolkits/tests/test_axes_grid1.py
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@@ -13,6 +13,7 @@
                      r"$\pi$", r"$\frac{3}{2}\pi$", r"$2\pi$"])
 
 ax2.axis["right"].major_ticklabels.set_visible(False)
+ax2.axis["top"].major_ticklabels.set_visible(True)
 
 plt.draw()
 plt.show()
@@ -125,7 +125,7 @@ def __init__(self, transform, size, label, loc,
 
         self.size_bar = AuxTransformBox(transform)
         self.size_bar.add_artist(Rectangle((0, 0), size, size_vertical,
-                                           fill=True, facecolor=color,
+                                           fill=False, facecolor=color,
                                            edgecolor=color))
 
         # if fontproperties is None, but `prop` is not, assume that
 
@@ -312,7 +312,7 @@ def __init__(self, bbox1, bbox2, loc1, loc2=None, **kwargs):
             raise ValueError("transform should not be set")
 
         kwargs["transform"] = IdentityTransform()
-        Patch.__init__(self, **kwargs)
+        Patch.__init__(self, fill=False, **kwargs)
         self.bbox1 = bbox1
         self.bbox2 = bbox2
         self.loc1 = loc1
@@ -582,7 +582,7 @@ def mark_inset(parent_axes, inset_axes, loc1, loc2, **kwargs):
     """
     rect = TransformedBbox(inset_axes.viewLim, parent_axes.transData)
 
-    pp = BboxPatch(rect, **kwargs)
+    pp = BboxPatch(rect, fill=False, **kwargs)
     parent_axes.add_patch(pp)
 
     p1 = BboxConnector(inset_axes.bbox, rect, loc1=loc1, **kwargs)
 
@@ -8,6 +8,8 @@
 
 from mpl_toolkits.axes_grid1 import make_axes_locatable
 from mpl_toolkits.axes_grid1 import AxesGrid
+from mpl_toolkits.axes_grid1.inset_locator import zoomed_inset_axes, mark_inset
+from mpl_toolkits.axes_grid1.anchored_artists import AnchoredSizeBar
 
 from matplotlib.colors import LogNorm
 
@@ -72,6 +74,55 @@ def test_axesgrid_colorbar_log_smoketest():
     grid.cbar_axes[0].colorbar(im)
 
 
+@image_comparison(
+    baseline_images=['inset_locator'], style='default', extensions=['png'],
+    remove_text=True)
+def test_inset_locator():
+    def get_demo_image():
+        from matplotlib.cbook import get_sample_data
+        import numpy as np
+        f = get_sample_data("axes_grid/bivariate_normal.npy", asfileobj=False)
+        z = np.load(f)
+        # z is a numpy array of 15x15
+        return z, (-3, 4, -4, 3)
+
+    fig, ax = plt.subplots(figsize=[5, 4])
+
+    # prepare the demo image
+    Z, extent = get_demo_image()
+    Z2 = np.zeros([150, 150], dtype="d")
+    ny, nx = Z.shape
+    Z2[30:30 + ny, 30:30 + nx] = Z
+
+    # extent = [-3, 4, -4, 3]
+    ax.imshow(Z2, extent=extent, interpolation="nearest",
+              origin="lower")
+
+    axins = zoomed_inset_axes(ax, 6, loc=1)  # zoom = 6
+    axins.imshow(Z2, extent=extent, interpolation="nearest",
+                 origin="lower")
+
+    # sub region of the original image
+    x1, x2, y1, y2 = -1.5, -0.9, -2.5, -1.9
+    axins.set_xlim(x1, x2)
+    axins.set_ylim(y1, y2)
+
+    plt.xticks(visible=False)
+    plt.yticks(visible=False)
+
+    # draw a bbox of the region of the inset axes in the parent axes and
+    # connecting lines between the bbox and the inset axes area
+    mark_inset(ax, axins, loc1=2, loc2=4, fc="none", ec="0.5")
+
+    asb = AnchoredSizeBar(ax.transData,
+                          0.5,
+                          '0.5',
+                          loc=8,
+                          pad=0.1, borderpad=0.5, sep=5,
+                          frameon=False)
+    ax.add_artist(asb)
+
+
 if __name__ == '__main__':
     import nose
     nose.runmodule(argv=['-s', '--with-doctest'], exit=False)