Bug report

import matplotlib.pyplot as plt
with plt.rc_context({'ytick.left': False}):
    f, ax = plt.subplots()
    print(ax.yaxis.majorTicks[0].tick1line.get_visible())
    ax.twinx()
    print(ax.yaxis.majorTicks[0].tick1line.get_visible())

Actual outcome

False
True

Expected outcome

False
False

Matplotlib version

• Operating system: MacOS
• Matplotlib version: 3.1.1
• Matplotlib backend (print(matplotlib.get_backend())): MacOSX
• Python version: 3.7.4
• Jupyter version (if applicable): N/A
• Other libraries: N/A