diff --git a/nlmod/dims/base.py b/nlmod/dims/base.py
index 3ec3f946..43085b10 100644
--- a/nlmod/dims/base.py
+++ b/nlmod/dims/base.py
@@ -46,7 +46,7 @@ def set_ds_attrs(ds, model_name, model_ws, mfversion="mf6", exe_name=None):
     ds.attrs["created_on"] = dt.datetime.now().strftime(fmt)
 
     if exe_name is None:
-        exe_name = util.get_exe_path(mfversion)
+        exe_name = util.get_exe_path(exe_name=mfversion)
 
     ds.attrs["exe_name"] = exe_name
 
diff --git a/nlmod/dims/grid.py b/nlmod/dims/grid.py
index 68a4c9b9..84656692 100644
--- a/nlmod/dims/grid.py
+++ b/nlmod/dims/grid.py
@@ -442,7 +442,7 @@ def refine(
     logger.info("create vertex grid using gridgen")
 
     if exe_name is None:
-        exe_name = util.get_exe_path("gridgen")
+        exe_name = util.get_exe_path(exe_name="gridgen")
 
     if model_ws is None:
         model_ws = os.path.join(ds.model_ws, "gridgen")
diff --git a/nlmod/modpath/modpath.py b/nlmod/modpath/modpath.py
index 125c3aa3..93d5358b 100644
--- a/nlmod/modpath/modpath.py
+++ b/nlmod/modpath/modpath.py
@@ -217,7 +217,7 @@ def mpf(gwf, exe_name=None, modelname=None, model_ws=None):
 
     # get executable
     if exe_name is None:
-        exe_name = util.get_exe_path("mp7_2_002_provisional")
+        exe_name = util.get_exe_path(exe_name="mp7_2_002_provisional")
 
     # create mpf model
     mpf = flopy.modpath.Modpath7(
diff --git a/nlmod/sim/sim.py b/nlmod/sim/sim.py
index 119a97bf..a690d038 100644
--- a/nlmod/sim/sim.py
+++ b/nlmod/sim/sim.py
@@ -131,7 +131,7 @@ def sim(ds, exe_name=None):
     logger.info("creating mf6 SIM")
 
     if exe_name is None:
-        exe_name = util.get_exe_path(ds.mfversion)
+        exe_name = util.get_exe_path(exe_name=ds.mfversion)
 
     # Create the Flopy simulation object
     sim = flopy.mf6.MFSimulation(