Unable to show legend in seaborn distplot

I am new to plotting in python and trying following code to plot distribution in seaborn but unable to see the legend, i.e., test_label1 and test_label1 on the plot.

import matplotlib.pylab as plt
import seaborn as sns
import numpy as np

plt.figure("Test Plots")
lst1 = list(np.random.rand(10))
lst2 = list(np.random.rand(10))
sns.distplot(lst1, label='test_label1', color="0.25")
sns.distplot(lst2, label='test_label2', color="0.25")

plt.show()