diff --git a/tests/test_callfsl.py b/tests/test_callfsl.py
deleted file mode 100644
index 25c972e386a2708a46f5fbcfeb139a995f63868b..0000000000000000000000000000000000000000
--- a/tests/test_callfsl.py
+++ /dev/null
@@ -1,85 +0,0 @@
-#!/usr/bin/env python
-#
-# test_callfsl.py -
-#
-# Author: Paul McCarthy <pauldmccarthy@gmail.com>
-#
-
-import               os
-import os.path    as op
-import subprocess as sp
-
-import numpy      as np
-import nibabel    as nib
-
-import mock
-import pytest
-
-import fsl.utils.callfsl                  as callfsl
-from   fsl.utils.platform import platform as fslplatform
-
-import tests
-
-
-pytestmark = pytest.mark.fsltest
-
-
-def setup_module():
-    fsldir = os.environ.get('FSLDIR', None)
-    if fsldir is None or not op.exists(fsldir):
-        raise Exception('FSLDIR is not set - callfsl tests cannot be run')
-
-
-# mock subprocess.check_output command
-# which expects 'fslstats -m filename'
-# or 'fslinfo ...'
-def mock_check_output(args):
-    if args[0].endswith('fslinfo'):
-        return 'info'.encode('utf-8')
-
-    img = nib.load(args[-2])
-    return str(img.get_data().mean()).encode('utf-8')
-
-
-def test_callfsl():
-
-    with tests.testdir() as testdir:
-
-        fname = op.join(testdir, 'myimage.nii.gz')
-
-        img   = tests.make_random_image(fname)
-        img   = img.get_data()
-
-        # Pass a single string
-        cmd    = 'fslstats {} -m'.format(fname)
-
-        with mock.patch('fsl.utils.callfsl.sp.check_output',
-                        mock_check_output):
-            result = callfsl.callFSL(cmd)
-
-            assert np.isclose(float(result), img.mean())
-
-            # Or pass a list of args
-            result = callfsl.callFSL(*cmd.split())
-            assert np.isclose(float(result), img.mean())
-
-        # Bad commands
-        badcmds = ['fslblob', 'fslstats notafile']
-
-        for cmd in badcmds:
-            with pytest.raises((OSError, sp.CalledProcessError)):
-                callfsl.callFSL(cmd)
-
-        # No FSL - should crash
-        cmd = 'fslinfo {}'.format(fname)
-        with mock.patch('fsl.utils.callfsl.sp.check_output',
-                        mock_check_output):
-            callfsl.callFSL(cmd)
-
-        try:
-            oldval = fslplatform.fsldir
-            fslplatform.fsldir = None
-            with pytest.raises(Exception):
-                callfsl.callFSL(cmd)
-        finally:
-            fslplatform.fsldir = oldval