TEST: Disable test_cli if xdist is enabled

Author: effigies

nitransforms/tests/test_cli.py

@@ -1,10 +1,18 @@
+import os
 from textwrap import dedent
 
 import pytest
 
 from ..cli import cli_apply, main as ntcli
 
+if os.getenv("PYTEST_XDIST_WORKER"):
+    breaks_on_xdist = pytest.mark.skip(reason="xdist is active; rerun without to run this test.")
+else:
+    def breaks_on_xdist(test):
+        return test
 
+
+@breaks_on_xdist
 def test_cli(capsys):
     # empty command
     with pytest.raises(SystemExit):