Unit tests with verifyError

Hello, I am trying to unit test the error message in the function below, which pops up if I input an incorrect fieldname: 'ALTMAN_T_SCORE' instead 'ALTMAN_Z_SCORE'.

My function:

function [CorrectFields]=FieldValidity(fieldNames,FieldDescrip)
check=FieldDescrip;
[badFld,indBadFld]=ismember('BAD_FLD',check(:,2));
if badFld
    error('Bad field identifier entered: %s not found.',fieldNames{indBadFld})
else
    CorrectFields=fieldNames;
end
end

And the unit test function which according to Matlab is incorrect:

function testFieldsAreInvalid(testCase)
a={'ALTMAN_T_SCORE';'BEST_ROE';'PX_LAST';'PX_VOLUME'};
aa={'Discription','BAD_FLD','ALTMAN_T_SCORE','Altman''s Z-Score';'Discription','BE014','BEST_ROE','BEst ROE';'Discription','PR005','PX_LAST','Last Price';'Discription','PR013','PX_VOLUME','Volume'};
actSolution=FieldValidity(a,aa);
verifyError(testCase,actSolution,'Bad field identifier entered: ALTMAN_T_SCORE not found.')
end

The error message is: Error occurred in getBbgFieldDataTest/testFieldsAreInvalid and it did not run to completion.

      ---------
      Error ID:
      ---------
      ''

      --------------
      Error Details:
      --------------
      Error using FieldValidity (line 7)
      Bad field identifier entered: ALTMAN_T_SCORE not found.

      Error in getBbgFieldDataTest>testFieldsAreInvalid (line 67)
      actSolution=FieldValidity(a,aa);
  ================================================================================
  .
  Done getBbgFieldDataTest
  __________

Failure Summary:

       Name                                      Failed  Incomplete  Reason(s)
      =========================================================================
       getBbgFieldDataTest/testYesWarning          X         X       Errored.
      -------------------------------------------------------------------------
       getBbgFieldDataTest/testFieldsAreInvalid    X         X       Errored.

I would appreciate your help. Thank you in advance.