diff --git a/src/Mod/Fem/Init.py b/src/Mod/Fem/Init.py
index 273741354e..a980400ca8 100644
--- a/src/Mod/Fem/Init.py
+++ b/src/Mod/Fem/Init.py
@@ -48,4 +48,4 @@ if("BUILD_FEM_VTK" in FreeCAD.__cmake__):
     FreeCAD.addImportType("FEM result VTK (*.vtk *.vtu)", "feminout.importVTKResults")
     FreeCAD.addExportType("FEM result VTK (*.vtk *.vtu)", "feminout.importVTKResults")
 
-FreeCAD.__unit_test__ += [ "TestFem" ]
+FreeCAD.__unit_test__ += ["TestFem"]