diff --git a/nipype/pipeline/plugins/tests/test_callback.py b/nipype/pipeline/plugins/tests/test_callback.py
index 66526c76c4..af6cbc76a1 100644
--- a/nipype/pipeline/plugins/tests/test_callback.py
+++ b/nipype/pipeline/plugins/tests/test_callback.py
@@ -9,10 +9,12 @@
 
 try:
     import pandas
+
     has_pandas = True
 except ImportError:
     has_pandas = False
 
+
 def func():
     return
 
@@ -68,7 +70,7 @@ def test_callback_exception(tmpdir, plugin, stop_on_first_crash):
 
 
 @pytest.mark.parametrize("plugin", ["Linear", "MultiProc", "LegacyMultiProc"])
-@pytest.mark.skipif(not has_pandas, "Test requires pandas")
+@pytest.mark.skipif(not has_pandas, reason="Test requires pandas")
 def test_callback_gantt(tmpdir, plugin):
     import logging