diff --git a/test/porousmediumflow/1p/incompressible/properties.hh b/test/porousmediumflow/1p/incompressible/properties.hh
index 5c59e2dfa12c2480f5796d5d1cdaf7ce32cda143..d68b73ba0465dc56753be8d5a05f6c4d105c53d3 100644
--- a/test/porousmediumflow/1p/incompressible/properties.hh
+++ b/test/porousmediumflow/1p/incompressible/properties.hh
@@ -71,6 +71,9 @@ public:
 
     struct Traits : public ParentType::Traits
     { using Grid = NoCommunicateGrid<dim>; };
+
+    const typename Traits::Grid& grid() const
+    { return static_cast<const typename Traits::Grid&>(ParentType::grid()); }
 };
 
 template<int dim>