The following script illustrates the issue: ``` python import matplotlib.pyplot as plt fig = plt.figure() ax = fig.add_subplot(1,1,1) ax.scatter([1,2,3], [3,4,5], c=[3,2,1], edgecolor='k', cmap=plt.cm.viridis) fig.savefig('scatter.png') ``` **Matplotlib 1.5.1**  **Matplotlib 2.0.0b3**  In the Matplotlib 2.0.0b3 version, the scatter markers are missing edges.