scipy failure

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ERROR: test_nonlin.TestNonlin.test_problem_nonlin(<function F4_powell at 0x7f0a5c5c1410>, <function newton_krylov at 0x7f0a604d2230>)
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Traceback (most recent call last):
  File "/home/sourav/miniconda2/lib/python2.7/site-packages/nose/case.py", line 197, in runTest
    self.test(*self.arg)
  File "/home/sourav/scipy/build/testenv/lib/python2.7/site-packages/scipy/optimize/tests/test_nonlin.py", line 105, in _check_nonlin_func
    x = func(f, f.xin, f_tol=f_tol, maxiter=200, verbose=0)
  File "<string>", line 8, in newton_krylov
  File "/home/sourav/scipy/build/testenv/lib/python2.7/site-packages/scipy/optimize/nonlin.py", line 347, in nonlin_solve
    raise NoConvergence(_array_like(x, x0))
NoConvergence: [ 0.00196136  0.05025112]

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FAIL: test_nonlin.TestNonlin.test_problem_root(<function F4_powell at 0x7f0a5c5c1410>, 'krylov')
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Traceback (most recent call last):
  File "/home/sourav/miniconda2/lib/python2.7/site-packages/nose/case.py", line 197, in runTest
    self.test(*self.arg)
  File "/home/sourav/scipy/build/testenv/lib/python2.7/site-packages/scipy/optimize/tests/test_nonlin.py", line 111, in _check_root
    assert_(np.absolute(res.fun).max() < f_tol)
  File "/home/sourav/miniconda2/lib/python2.7/site-packages/numpy/testing/utils.py", line 53, in assert_
    raise AssertionError(smsg)
AssertionError

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Ran 23217 tests in 470.814s

FAILED (KNOWNFAIL=59, SKIP=1851, errors=1, failures=1)