use a tuple

cwhanse · cwhanse · commit 58d04b4b1266 · 2024-11-07T07:53:39.000-08:00
diff --git a/pvlib/tests/ivtools/test_sdm.py b/pvlib/tests/ivtools/test_sdm.py
@@ -92,7 +92,7 @@ def test_fit_desoto_init_guess(mocker):
                                alpha_sc=0.005658, beta_voc=-0.13788,
                                cells_in_series=60, init_guess=init_guess)
     optimize.root.assert_called_once_with(mocker.ANY, x0=init_guess_array,
-                                          args=specs, **root_args)
+                                          args=(specs,), **root_args)
 
 
 def test_fit_desoto_failure():
