diff --git a/matlab/tests/check_gdatpaths.m b/matlab/tests/check_gdatpaths.m
index e208bad433da34cf64471548c066ebad3db23a64..43fa33e17ba0dbdeacb1a2b93dd2835664547ec3 100644
--- a/matlab/tests/check_gdatpaths.m
+++ b/matlab/tests/check_gdatpaths.m
@@ -3,7 +3,7 @@ classdef check_gdatpaths < matlab.unittest.fixtures.Fixture
     function setup(fixture)
       % caller
       oldpwd = pwd;
-      testfolder = fileparts(fullfile(mfilename('fullpath'))); % relative path w.r.t. this file
+      testfolder = fileparts(mfilename('fullpath')); % relative path w.r.t. this file
       cd(testfolder); % go into test folder so you might not see local gdat.m
       gdatpath = fileparts(which('gdat'));
       cd(oldpwd);