diff --git a/test/test_elixir_credo.vader b/test/test_elixir_credo.vader
new file mode 100644
index 00000000..db956683
--- /dev/null
+++ b/test/test_elixir_credo.vader
@@ -0,0 +1,33 @@
+Before:
+  call ale#test#SetDirectory('/testplugin/test')
+
+  runtime ale_linters/elixir/credo.vim
+
+After:
+  call ale#test#RestoreDirectory()
+  call ale#linter#Reset()
+  let g:ale_elixir_credo_strict = 0
+  let g:ale_elixir_credo_config_file = ''
+
+Execute(credo runs the right command):
+  call ale#test#SetFilename('elixir-test-files/testfile.ex')
+
+  AssertEqual
+  \ ale_linters#elixir#credo#GetCommand(bufnr('')),
+  \ 'cd ''.'' && mix help credo && mix credo suggest --format=flycheck --read-from-stdin %s'
+
+Execute(credo runs the right command with the strict flag):
+  let g:ale_elixir_credo_strict = 1
+  call ale#test#SetFilename('elixir-test-files/testfile.ex')
+
+  AssertEqual
+  \ ale_linters#elixir#credo#GetCommand(bufnr('')),
+  \ 'cd ''.'' && mix help credo && mix credo --strict --format=flycheck --read-from-stdin %s'
+
+Execute(credo runs the right command with a custom config file):
+  let g:ale_elixir_credo_config_file = '/home/user/custom_credo.exs'
+  call ale#test#SetFilename('elixir-test-files/testfile.ex')
+
+  AssertEqual
+  \ ale_linters#elixir#credo#GetCommand(bufnr('')),
+  \ 'cd ''.'' && mix help credo && mix credo suggest --config-file /home/user/custom_credo.exs --format=flycheck --read-from-stdin %s'