diff --git a/src/Mod/Fem/feminout/importFenicsMesh.py b/src/Mod/Fem/feminout/importFenicsMesh.py
index 7bba6eaa907c..9000cec28bcb 100644
--- a/src/Mod/Fem/feminout/importFenicsMesh.py
+++ b/src/Mod/Fem/feminout/importFenicsMesh.py
@@ -59,9 +59,10 @@ class WriteXDMFTaskPanel:
         It will called if there are mesh groups detected. Else it will be bypassed.
         """
         def __init__(self, fem_mesh_obj, fileString):
-            self.form = FreeCADGui.PySideUic.loadUi(
-                FreeCAD.getHomePath() +
-                "Mod/Fem/Resources/ui/MeshGroupXDMFExport.ui")
+            self.form = FreeCADGui.PySideUic.loadUi(os.path.join(
+                FreeCAD.getHomePath(),
+                "Mod/Fem/Resources/ui/MeshGroupXDMFExport.ui"
+            ))
             self.result_dict = {}
             self.fem_mesh_obj = fem_mesh_obj
             self.fileString = fileString
@@ -75,7 +76,8 @@ def ro(item):
                 return item
 
             gmshgroups = importToolsFem.get_FemMeshObjectMeshGroups(
-                            self.fem_mesh_obj)
+                self.fem_mesh_obj
+            )
             fem_mesh = self.fem_mesh_obj.FemMesh
 
             self.form.tableGroups.setRowCount(0)
@@ -123,9 +125,10 @@ def convert_table_to_group_dict(self):
                     marked_value = int(self.form.tableGroups.item(r, 4).text())
                 except ValueError:
                     FreeCAD.Console.PrintError(
-                        "ERROR: value conversion failed " +
-                        "in table to dict: assuming 0 for default, " +
-                        "1 for marked.\n")
+                        "ERROR: value conversion failed "
+                        "in table to dict: assuming 0 for default, "
+                        "1 for marked.\n"
+                    )
 
                 group_values_dict[g] = (marked_value, default_value)