frompathlibimportPathimportmatplotlibasmplfrommatplotlib.testing.compareimportcompare_imagesfrommatplotlibimportpyplotasplt,stylefromPILimportImagempl.use("agg")mpl.style.use("classic")path=str(Path(mpl.__file__).parent/"tests/baseline_images/pngsuite/basn3p04.png")fig=plt.figure()fig.subplots().imshow(plt.imread(path))fig.savefig("1.png")fig=plt.figure()fig.subplots().imshow(Image.open(path))fig.savefig("2.png")print(compare_images("1.png","2.png",tol=0))

Error: Image files did not match.  RMS Value: 0.010865337342004415  Expected:      1.png  Actual:        2.png  Difference:    2-failed-diff.png  Tolerance:     0