diff --git a/Project.toml b/Project.toml
index 86cda67b..b9231758 100644
--- a/Project.toml
+++ b/Project.toml
@@ -15,7 +15,7 @@ SparseDiffTools = "47a9eef4-7e08-11e9-0b38-333d64bd3804"
 [compat]
 MPI = "0.20"
 MPIPreferences = "0.1"
-PETSc_jll = "~3.21"
+PETSc_jll = "3.22"
 SparseArrays = "1.10"
 julia = "1.10"
 
diff --git a/examples/DMSTAG_Stokes_2D.jl b/examples/DMSTAG_Stokes_2D.jl
index af7f516f..050c31ea 100644
--- a/examples/DMSTAG_Stokes_2D.jl
+++ b/examples/DMSTAG_Stokes_2D.jl
@@ -93,7 +93,7 @@ function FormJacobian!(ptr_x_g, J, P, user_ctx)
     # Extract the local vector
     #PETSc.DMGlobalToLocal(user_ctx.dm, cx_g,  PETSc.INSERT_VALUES,  user_ctx.x_l) 
     PETSc.update!(user_ctx.x_l, ptr_x_g, PETSc.INSERT_VALUES)
-    x               =   PETSc.unsafe_localarray(Float64, user_ctx.x_l.ptr;  write=false, read=true);
+    x               =   PETSc.unsafe_localarray(Float64, user_ctx.x_l.ptr;  write=false);
 
     # Check the sparsity pattern
     if isnothing(user_ctx.jac)
diff --git a/examples/DMSTAG_porwave_1D.jl b/examples/DMSTAG_porwave_1D.jl
index 9869c830..ea5e95eb 100644
--- a/examples/DMSTAG_porwave_1D.jl
+++ b/examples/DMSTAG_porwave_1D.jl
@@ -84,7 +84,7 @@ function FormJacobian!(ptr_x_g, J, P, user_ctx)
 
     # Extract the local vector from pointer to global vector
     PETSc.update!(user_ctx.x_l, ptr_x_g, PETSc.INSERT_VALUES)
-    x               =   PETSc.unsafe_localarray(Float64, user_ctx.x_l.ptr;  write=false, read=true)
+    x               =   PETSc.unsafe_localarray(Float64, user_ctx.x_l.ptr;  write=false)
 
     if isnothing(user_ctx.jac)
         # Compute sparsity pattern of jacobian. This is relatvely slow, but only has to be done once.
diff --git a/examples/SNES_ex2.jl b/examples/SNES_ex2.jl
index ee105c57..99dff26c 100644
--- a/examples/SNES_ex2.jl
+++ b/examples/SNES_ex2.jl
@@ -45,12 +45,12 @@ function FormResidual!(cf,cx, args...)
     if typeof(cx) <: Ptr{Nothing}
         # When this routine is called from PETSc, cx is a pointer to a global vector
         # That's why we have to transfer it first to 
-        x   =   PETSc.unsafe_localarray(PETSc.scalartype(petsclib),cx)
+        x   =   PETSc.unsafe_localarray(PETSc.scalartype(petsclib),cx, write=false)
     else
         x   = cx;
     end
     if typeof(cf) <: Ptr{Nothing}
-        f   =   PETSc.unsafe_localarray(PETSc.scalartype(petsclib),cf)
+        f   =   PETSc.unsafe_localarray(PETSc.scalartype(petsclib),cf, write=true)
     else
         f   = cf;
     end
@@ -76,7 +76,7 @@ end
 function FormJacobian!(cx, args...)
 
     if typeof(cx) <: Ptr{Nothing}
-        x   =   PETSc.unsafe_localarray(PETSc.scalartype(petsclib),cx)
+        x   =   PETSc.unsafe_localarray(PETSc.scalartype(petsclib),cx, write=false)
     else
         x   =   cx;
     end
diff --git a/examples/SNES_ex2b.jl b/examples/SNES_ex2b.jl
index 9522ad2b..bdb94184 100644
--- a/examples/SNES_ex2b.jl
+++ b/examples/SNES_ex2b.jl
@@ -35,12 +35,12 @@ function FormResidual!(cf,cx, args...)
     if typeof(cx) <: Ptr{Nothing}
         # When this routine is called from PETSc, cx is a pointer to a global vector
         # That's why we have to transfer it first to 
-        x   =   PETSc.unsafe_localarray(PETSc.scalartype(petsclib),cx)
+        x   =   PETSc.unsafe_localarray(PETSc.scalartype(petsclib),cx, write=false)
     else
         x   = cx;
     end
     if typeof(cf) <: Ptr{Nothing}
-        f   =   PETSc.unsafe_localarray(PETSc.scalartype(petsclib),cf)
+        f   =   PETSc.unsafe_localarray(PETSc.scalartype(petsclib),cf, write=true)
     else
         f   = cf;
     end
@@ -76,7 +76,7 @@ end
 function FormJacobian!(cx, args...)
 
     if typeof(cx) <: Ptr{Nothing}
-        x   =   PETSc.unsafe_localarray(PETSc.scalartype(petsclib),cx)
+        x   =   PETSc.unsafe_localarray(PETSc.scalartype(petsclib),cx, write=false)
     else
         x   =   cx;
     end
diff --git a/src/vec.jl b/src/vec.jl
index 5337c0ab..07f93761 100644
--- a/src/vec.jl
+++ b/src/vec.jl
@@ -254,7 +254,7 @@ julia> map_unsafe_localarray(x; write=true) do x
 end
 
 !!! note
-    `Base.finalize` should is automatically called on the array.
+    `Base.finalize` is automatically called on the array.
 """
 function map_unsafe_localarray!(f!, v::AbstractVec{T}; kwargs...) where {T}
     array = unsafe_localarray(T, v.ptr; kwargs...)
diff --git a/test/old_test.jl b/test/old_test.jl
index 2454504b..944ae1c9 100644
--- a/test/old_test.jl
+++ b/test/old_test.jl
@@ -1,6 +1,7 @@
 using Test
 using PETSc, MPI, LinearAlgebra, SparseArrays
-PETSc.initialize()
+#PETSc.initialize()
+PETSc.initialize(PETSc.petsclibs[1])
 
 @testset "Tests" begin
   m,n = 20,20
@@ -28,7 +29,7 @@ PETSc.initialize()
   @test PETSc.gettype(pc) == "jacobi"
 
   # create an extra handle, check ref count is incremented
-  pc_extra = PETSc.PC(ksp)
+  pc_extra = PETSc.PC(ksp);
   @test PETSc.nrefs(pc) == 3
   # destroy extra handle, check ptr is set to null, ref count is decremented
   PETSc.destroy(pc_extra)
@@ -71,8 +72,8 @@ PETSc.initialize()
 
 
   function F!(cfx, cx, a)
-    x = PETSc.unsafe_localarray(Float64,cx)
-    fx = PETSc.unsafe_localarray(Float64,cfx)
+    x = PETSc.unsafe_localarray(Float64,cx,  write=false)
+    fx = PETSc.unsafe_localarray(Float64,cfx,write=true)
     fx[1] = x[1]^2 + x[1]*x[2] - 3
     fx[2] = x[1]*x[2] + x[2]^2 - 6
     Base.finalize(x)
@@ -82,7 +83,7 @@ PETSc.initialize()
   J = zeros(2,2)
   PJ = PETSc.MatSeqDense(J)
   function updateJ!(cx, args...)
-    x = PETSc.unsafe_localarray(Float64,cx)
+    x = PETSc.unsafe_localarray(Float64,cx, write=false)
     J[1,1] = 2x[1] + x[2]
     J[1,2] = x[1]
     J[2,1] = x[2]
@@ -93,5 +94,6 @@ PETSc.initialize()
   S = PETSc.SNES{Float64}(PETSc.petsclibs[1],MPI.COMM_SELF; ksp_rtol=1e-4, pc_type="none")
   PETSc.setfunction!(S, F!, PETSc.VecSeq(zeros(2)))
   PETSc.setjacobian!(S, updateJ!, PJ, PJ)
-  @test PETSc.solve!([2.0,3.0], S) ≈ [1.0,2.0] rtol=1e-4
+  a = PETSc.VecSeq([2.0,3.0])
+  @test PETSc.solve!(a, S) ≈ [1.0,2.0] rtol=1e-4
 end
diff --git a/test/runtests.jl b/test/runtests.jl
index e0450c1f..06baaa08 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -27,7 +27,6 @@ if do_mpi
     include("mpi_examples.jl")
 end
 
-
 include("options.jl")
 include("dmda.jl")
 include("old_test.jl")
diff --git a/test/test_snes.jl b/test/test_snes.jl
index c65b3628..9c93f56d 100644
--- a/test/test_snes.jl
+++ b/test/test_snes.jl
@@ -30,7 +30,7 @@ MPI.Initialized() || MPI.Init()
         # We could do Global->Local here on cfx/cx, provided a pointer to the local
         #  vector is available in user_ctx
         x_in  = PETSc.unsafe_localarray(PetscScalar, cx;  write=false)   # read array
-        fx_in = PETSc.unsafe_localarray(PetscScalar, cfx; read=false)    # write array
+        fx_in = PETSc.unsafe_localarray(PetscScalar, cfx; write=true)    # write array
       
         fx_in[1] = x_in[1]^2       +  x_in[1]*x_in[2] - 3
         fx_in[2] = x_in[1]*x_in[2] +  x_in[2]^2 - 6
@@ -76,7 +76,7 @@ MPI.Initialized() || MPI.Init()
       b  = PETSc.VecSeq(PetscScalar.([0.0, 0.0]));
       PETSc.solve!(x, S, b)
 
-      sol = PETSc.unsafe_localarray(PetscScalar, x.ptr; read=false)
+      sol = PETSc.unsafe_localarray(PetscScalar, x.ptr)
       @test sol ≈ [1.0,2.0] rtol=1e-4
 
       # cleanup