--- sympy-sympy-1.8/sympy/physics/quantum/tests/test_circuitplot.py.orig 2021-04-09 16:29:50.000000000 -0600
+++ sympy-sympy-1.8/sympy/physics/quantum/tests/test_circuitplot.py 2021-04-12 13:27:55.241417177 -0600
@@ -4,7 +4,9 @@ from sympy.physics.quantum.gate import C
from sympy.external import import_module
from sympy.testing.pytest import skip
-mpl = import_module('matplotlib')
+mpl = import_module(
+ 'matplotlib', import_kwargs={'fromlist': ['pyplot']},
+ catch=(RuntimeError,)) # This is raised in environments that have no display.
def test_render_label():
assert render_label('q0') == r'$\left|q0\right\rangle$'