Bug summary

When setting the tick length on the top spine only, it is also applied to the bottom spine, creating space between the bottom of the chart and the axis labels.

Code for reproduction

import matplotlib.pyplot as plt

fig, ax = plt.subplots()
ax.plot(range(2020, 2025),
        range(-2, 3))

ax.spines['top'].set_position('zero')
ax.spines['bottom'].set_visible(False)
ax.tick_params(labelbottom=True, labeltop=False, bottom=False, top=True)
ax.spines['top'].axis.set_tick_params(length=10)
ax.set_xticks(range(2020, 2025))

plt.show()

Actual outcome

Expected outcome

Additional information

No response

Operating system

Windows

Matplotlib Version

3.3.4

Matplotlib Backend

TkAgg

Python version

3.6.13

Jupyter version

No response

Installation

pip