Elixir test ERROR

gistfile1.txt

Running tests ...
time elixir -pa ebin -r "test/**/*_test.exs"
......F....

1) test_date_to_timestamp_with_chars (DateTest)
  ** (ExUnit.AssertionError) Expected "2000-01-01 23:59:59" to be equal to (==) "200045014501322358595859"
  stacktrace:
    /disco/programas/exdate/test/date_test.exs:107: DateTest.test_date_to_timestamp_with_chars/0
    /disco/programas/elixir/lib/ex_unit/runner.ex:78: ExUnit.Runner.run_test/3
    /disco/programas/elixir/lib/enum.ex:619: Enum.do_each/3
    /disco/programas/elixir/lib/enum.ex:187: Enum.each/2
    /disco/programas/elixir/lib/ex_unit/runner.ex:69: ExUnit.Runner.run_tests/2

11 tests, 1 failures.
Command exited with non-zero status 1
0.28user 0.02system 0:00.31elapsed 97%CPU (0avgtext+0avgdata 90096maxresident)k
0inputs+0outputs (0major+12478minor)pagefaults 0swaps
make: ** [test] Erro 1