The test_concrete_dropout unit test is failing

[tgdif]

Description

When running the unit tests on the master branch using python -m unittest discover -bfp '*_test.py' I am obtaining the following output:

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FAIL: test_concrete_dropout (pyoneer.layers.layers_test.LayersTest)
test_concrete_dropout (pyoneer.layers.layers_test.LayersTest)
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AssertionError: 
Not equal to tolerance rtol=1e-06, atol=1e-06
Mismatched value: a is different from b. 
not close lhs = -0.9752495884895325
not close rhs = -0.325083
not close dif = 0.6501665884895325
not close tol = 1.325083e-06
dtype = float32, shape = ()
Mismatch: 100%
Max absolute difference: 0.65016659
Max relative difference: 2.00000181
 x: array(-0.97525, dtype=float32)
 y: array(-0.325083)

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Ran 13 tests in 0.043s

FAILED (failures=1, skipped=4)