diff --git a/nipype/algorithms/tests/test_stats.py b/nipype/algorithms/tests/test_stats.py
new file mode 100644
index 0000000000..f9865a3fb3
--- /dev/null
+++ b/nipype/algorithms/tests/test_stats.py
@@ -0,0 +1,22 @@
+# -*- coding: utf-8 -*-
+# emacs: -*- mode: python; py-indent-offset: 4; indent-tabs-mode: nil -*-
+# vi: set ft=python sts=4 ts=4 sw=4 et:
+
+import numpy as np
+import nibabel as nb
+from nipype.algorithms.stats import ACM
+
+
+def test_ACM(tmpdir):
+    tmpdir.chdir()
+    in_files = ['{:d}.nii'.format(i) for i in range(3)]
+    for fname in in_files:
+        nb.Nifti1Image(np.random.normal(size=(5, 5, 5)),
+                       np.eye(4)).to_filename(fname)
+
+    acm = ACM(in_files=in_files)
+    res = acm.run()
+    diff = nb.load(res.outputs.out_file)
+    pos = nb.load(res.outputs.acm_pos)
+    neg = nb.load(res.outputs.acm_neg)
+    assert np.allclose(diff.get_data(), pos.get_data() - neg.get_data())