TST: add a force to a use call to be safe

tacaswell · anntzer · commit ce0c5e02bc1d · 2018-08-26T23:00:27.000+02:00
diff --git a/lib/matplotlib/tests/test_backend_svg.py b/lib/matplotlib/tests/test_backend_svg.py
@@ -139,7 +139,7 @@ def test_determinism(filename, usetex):
                 [sys.executable, '-R', '-c',
                  'import matplotlib; '
                  'matplotlib._called_from_pytest = True; '
-                 'matplotlib.use("svg"); '
+                 'matplotlib.use("svg", force=True); '
                  'from matplotlib.tests.test_backend_svg '
                  'import _test_determinism_save;'
                  '_test_determinism_save(%r, %r)' % (filename, usetex)],
