test fix

scottjones03 · web-flow · commit 91dafcd4659a · 2022-06-15T17:53:09.000+01:00
diff --git a/lib/matplotlib/tests/test_figure.py b/lib/matplotlib/tests/test_figure.py
@@ -1247,12 +1247,17 @@ def test_subfigure_scatter_size():
         ax.scatter([1, 2, 3], [1, 2, 3], s=30, marker='s', color='r')
         ax.scatter([3, 4, 5], [1, 2, 3], s=[20, 30, 40], marker='s', color='g')
 
+
 def test_subfigure_pdf():
     fig = plt.figure(layout='constrained')
-    fig.subfigures()
-    buffer = io.StringIO()
+    sub_fig = fig.subfigures()
+    ax = sub_fig.add_subplot(111)
+    b = ax.bar(1,1)
+    ax.bar_label(b)
+    buffer = io.BytesIO()
     fig.savefig(buffer, format='pdf')
 
+
 def test_add_subplot_kwargs():
     # fig.add_subplot() always creates new axes, even if axes kwargs differ.
     fig = plt.figure()
