diff --git a/tests/test_gui_mpl.py b/tests/test_gui_mpl.py
index a9c4ebd6..8889f953 100644
--- a/tests/test_gui_mpl.py
+++ b/tests/test_gui_mpl.py
@@ -21,7 +21,7 @@
         import spotpy
 
     from spotpy.gui.mpl import GUI
-    from test_setup_parameters import SpotSetupMixedParameterFunction as Setup
+    from .test_setup_parameters import SpotSetupMixedParameterFunction as Setup
 
 
     class TestGuiMpl(unittest.TestCase):