TST: explicitly close the all the figures after each test

tacaswell · tacaswell · commit 30ebdf915438 · 2019-08-24T13:37:40.000-04:00
diff --git a/lib/matplotlib/testing/conftest.py b/lib/matplotlib/testing/conftest.py
@@ -54,10 +54,10 @@ def mpl_test_settings(request):
             style, = style_marker.args
 
         matplotlib.testing.setup()
+        # This import must come after setup() so it doesn't load the
+        # default backend prematurely.
+        import matplotlib.pyplot as plt
         if backend is not None:
-            # This import must come after setup() so it doesn't load the
-            # default backend prematurely.
-            import matplotlib.pyplot as plt
             try:
                 plt.switch_backend(backend)
             except ImportError as exc:
@@ -73,10 +73,12 @@ def mpl_test_settings(request):
         try:
             yield
         finally:
+            plt.close('all')
             if backend is not None:
                 plt.switch_backend(prev_backend)
 
 
+
 @pytest.fixture
 def mpl_image_comparison_parameters(request, extension):
     # This fixture is applied automatically by the image_comparison decorator.
