diff --git a/test/blockstructured/poisson/poisson_vec.ufl b/test/blockstructured/poisson/poisson_vec.ufl
index 33b3ac4935d9b3e030d68e100282f9b3734f6f31..6344a32d9709f0289e983eaf7c018b006278a724 100644
--- a/test/blockstructured/poisson/poisson_vec.ufl
+++ b/test/blockstructured/poisson/poisson_vec.ufl
@@ -8,7 +8,7 @@ V = FiniteElement("CG", cell, 1)
 u = TrialFunction(V)
 v = TestFunction(V)
 
-forms = [(inner(grad(u), grad(v)) - f*v)*dx]
+r =(inner(grad(u), grad(v)) - f*v)*dx
 dirichlet_expression = g
 exact_solution = g
 is_dirichlet = 1