diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4d3ebc81..1dac13ea 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -31,8 +31,9 @@ jobs:
             ${{ runner.os }}-test-${{ env.cache-name }}-
             ${{ runner.os }}-test-
             ${{ runner.os }}-
-      - uses: julia-actions/julia-buildpkg@v1
-      - run: julia --project=. --color=yes --check-bounds=yes test/sequential/runtests.jl
+      #- uses: julia-actions/julia-buildpkg@v1
+      - run: julia --project=test/TestApp/ -e 'using Pkg; Pkg.instantiate()' 
+      - run: julia --project=test/TestApp/ --color=yes --check-bounds=yes test/sequential/runtests.jl
       - uses: julia-actions/julia-processcoverage@v1
       - uses: codecov/codecov-action@v1
         with:
@@ -65,9 +66,11 @@ jobs:
         with:
           version: ${{ matrix.version }}
           arch: ${{ matrix.arch }}
-      - uses: julia-actions/julia-buildpkg@v1
-      - run: julia --project=. --color=yes --check-bounds=yes test/mpi/runtests.jl
+      #- uses: julia-actions/julia-buildpkg@v1
+      - run: cd test/TestApp/compile; ./compile.sh 
+      - run: julia --project=test/TestApp/ -e 'using Pkg; Pkg.instantiate()' 
+      - run: julia --project=test/TestApp/ --color=yes --check-bounds=yes test/mpi/runtests.jl test/TestApp/compile/TestApp.so
       - uses: julia-actions/julia-processcoverage@v1
       - uses: codecov/codecov-action@v1
         with:
-          file: lcov.info
\ No newline at end of file
+          file: lcov.info
diff --git a/src/Visualization.jl b/src/Visualization.jl
index ca5dc3a0..f8c0a8df 100644
--- a/src/Visualization.jl
+++ b/src/Visualization.jl
@@ -152,4 +152,3 @@ function Visualization.create_vtk_file(
       celldata=c,nodaldata=n)
   end
 end
-
diff --git a/test/TestApp/Manifest.toml b/test/TestApp/Manifest.toml
new file mode 100644
index 00000000..0e8cda9d
--- /dev/null
+++ b/test/TestApp/Manifest.toml
@@ -0,0 +1,534 @@
+# This file is machine-generated - editing it directly is not advised
+
+[[AbstractTrees]]
+git-tree-sha1 = "03e0550477d86222521d254b741d470ba17ea0b5"
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+
+[[ArgTools]]
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+
+[[ArrayInterface]]
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+
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+
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+
+[[BSON]]
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+
+[[Base64]]
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+
+[[BlockArrays]]
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+
+[[ChainRulesCore]]
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+
+[[CodecZlib]]
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+
+[[Combinatorics]]
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+
+[[DataStructures]]
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+
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+[[Downloads]]
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+[[FiniteDiff]]
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+[[Gridap]]
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+git-tree-sha1 = "d3bfeb769259b08f7385bdad91681f38c50fc519"
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+[[GridapDistributed]]
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+path = "../.."
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+
+[[IfElse]]
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+
+[[OpenMPI_jll]]
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+
+[[RecipesBase]]
+git-tree-sha1 = "44a75aa7a527910ee3d1751d1f0e4148698add9e"
+uuid = "3cdcf5f2-1ef4-517c-9805-6587b60abb01"
+version = "1.1.2"
+
+[[Reexport]]
+git-tree-sha1 = "45e428421666073eab6f2da5c9d310d99bb12f9b"
+uuid = "189a3867-3050-52da-a836-e630ba90ab69"
+version = "1.2.2"
+
+[[RelocatableFolders]]
+deps = ["SHA", "Scratch"]
+git-tree-sha1 = "df2be5142a2a3db2da37b21d87c9fa7973486bfd"
+uuid = "05181044-ff0b-4ac5-8273-598c1e38db00"
+version = "0.1.2"
+
+[[Requires]]
+deps = ["UUIDs"]
+git-tree-sha1 = "4036a3bd08ac7e968e27c203d45f5fff15020621"
+uuid = "ae029012-a4dd-5104-9daa-d747884805df"
+version = "1.1.3"
+
+[[SHA]]
+uuid = "ea8e919c-243c-51af-8825-aaa63cd721ce"
+
+[[Scratch]]
+deps = ["Dates"]
+git-tree-sha1 = "0b4b7f1393cff97c33891da2a0bf69c6ed241fda"
+uuid = "6c6a2e73-6563-6170-7368-637461726353"
+version = "1.1.0"
+
+[[Serialization]]
+uuid = "9e88b42a-f829-5b0c-bbe9-9e923198166b"
+
+[[SharedArrays]]
+deps = ["Distributed", "Mmap", "Random", "Serialization"]
+uuid = "1a1011a3-84de-559e-8e89-a11a2f7dc383"
+
+[[Sockets]]
+uuid = "6462fe0b-24de-5631-8697-dd941f90decc"
+
+[[SparseArrays]]
+deps = ["LinearAlgebra", "Random"]
+uuid = "2f01184e-e22b-5df5-ae63-d93ebab69eaf"
+
+[[SparseMatricesCSR]]
+deps = ["LinearAlgebra", "SparseArrays", "SuiteSparse"]
+git-tree-sha1 = "ad906b39ce5e05ec509495dfc7b38d11ce9ab40b"
+uuid = "a0a7dd2c-ebf4-11e9-1f05-cf50bc540ca1"
+version = "0.6.5"
+
+[[SpecialFunctions]]
+deps = ["ChainRulesCore", "IrrationalConstants", "LogExpFunctions", "OpenLibm_jll", "OpenSpecFun_jll"]
+git-tree-sha1 = "2d57e14cd614083f132b6224874296287bfa3979"
+uuid = "276daf66-3868-5448-9aa4-cd146d93841b"
+version = "1.8.0"
+
+[[Static]]
+deps = ["IfElse"]
+git-tree-sha1 = "a8f30abc7c64a39d389680b74e749cf33f872a70"
+uuid = "aedffcd0-7271-4cad-89d0-dc628f76c6d3"
+version = "0.3.3"
+
+[[StaticArrays]]
+deps = ["LinearAlgebra", "Random", "Statistics"]
+git-tree-sha1 = "3c76dde64d03699e074ac02eb2e8ba8254d428da"
+uuid = "90137ffa-7385-5640-81b9-e52037218182"
+version = "1.2.13"
+
+[[Statistics]]
+deps = ["LinearAlgebra", "SparseArrays"]
+uuid = "10745b16-79ce-11e8-11f9-7d13ad32a3b2"
+
+[[StatsAPI]]
+git-tree-sha1 = "1958272568dc176a1d881acb797beb909c785510"
+uuid = "82ae8749-77ed-4fe6-ae5f-f523153014b0"
+version = "1.0.0"
+
+[[SuiteSparse]]
+deps = ["Libdl", "LinearAlgebra", "Serialization", "SparseArrays"]
+uuid = "4607b0f0-06f3-5cda-b6b1-a6196a1729e9"
+
+[[TOML]]
+deps = ["Dates"]
+uuid = "fa267f1f-6049-4f14-aa54-33bafae1ed76"
+
+[[Tar]]
+deps = ["ArgTools", "SHA"]
+uuid = "a4e569a6-e804-4fa4-b0f3-eef7a1d5b13e"
+
+[[Test]]
+deps = ["InteractiveUtils", "Logging", "Random", "Serialization"]
+uuid = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
+
+[[TranscodingStreams]]
+deps = ["Random", "Test"]
+git-tree-sha1 = "216b95ea110b5972db65aa90f88d8d89dcb8851c"
+uuid = "3bb67fe8-82b1-5028-8e26-92a6c54297fa"
+version = "0.9.6"
+
+[[UUIDs]]
+deps = ["Random", "SHA"]
+uuid = "cf7118a7-6976-5b1a-9a39-7adc72f591a4"
+
+[[UnPack]]
+git-tree-sha1 = "387c1f73762231e86e0c9c5443ce3b4a0a9a0c2b"
+uuid = "3a884ed6-31ef-47d7-9d2a-63182c4928ed"
+version = "1.0.2"
+
+[[Unicode]]
+uuid = "4ec0a83e-493e-50e2-b9ac-8f72acf5a8f5"
+
+[[WriteVTK]]
+deps = ["Base64", "CodecZlib", "FillArrays", "LightXML", "TranscodingStreams"]
+git-tree-sha1 = "c3403143cecb391ea51fc133be82b024e4ce720b"
+uuid = "64499a7a-5c06-52f2-abe2-ccb03c286192"
+version = "1.11.0"
+
+[[XML2_jll]]
+deps = ["Artifacts", "JLLWrappers", "Libdl", "Libiconv_jll", "Pkg", "Zlib_jll"]
+git-tree-sha1 = "1acf5bdf07aa0907e0a37d3718bb88d4b687b74a"
+uuid = "02c8fc9c-b97f-50b9-bbe4-9be30ff0a78a"
+version = "2.9.12+0"
+
+[[Zlib_jll]]
+deps = ["Libdl"]
+uuid = "83775a58-1f1d-513f-b197-d71354ab007a"
+
+[[nghttp2_jll]]
+deps = ["Artifacts", "Libdl"]
+uuid = "8e850ede-7688-5339-a07c-302acd2aaf8d"
+
+[[p7zip_jll]]
+deps = ["Artifacts", "Libdl"]
+uuid = "3f19e933-33d8-53b3-aaab-bd5110c3b7a0"
diff --git a/test/TestApp/Project.toml b/test/TestApp/Project.toml
new file mode 100644
index 00000000..6eed60fb
--- /dev/null
+++ b/test/TestApp/Project.toml
@@ -0,0 +1,11 @@
+name = "TestApp"
+uuid = "3ba29202-0f57-4e69-8cbd-5c57d4c4860a"
+version = "0.1.0"
+
+[deps]
+Gridap = "56d4f2e9-7ea1-5844-9cf6-b9c51ca7ce8e"
+GridapDistributed = "f9701e48-63b3-45aa-9a63-9bc6c271f355"
+MPI = "da04e1cc-30fd-572f-bb4f-1f8673147195"
+PackageCompiler = "9b87118b-4619-50d2-8e1e-99f35a4d4d9d"
+PartitionedArrays = "5a9dfac6-5c52-46f7-8278-5e2210713be9"
+Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
diff --git a/test/TestApp/compile/compile.jl b/test/TestApp/compile/compile.jl
new file mode 100644
index 00000000..b85e847b
--- /dev/null
+++ b/test/TestApp/compile/compile.jl
@@ -0,0 +1,40 @@
+function generate_precompile_execution_file()
+ source_code="""
+ module sysimagegenerator
+    using TestApp
+    using PartitionedArrays
+    const PArrays = PartitionedArrays
+    using MPI
+
+    if ! MPI.Initialized()
+      MPI.Init()
+    end
+
+    parts = get_part_ids(mpi,(1,1))
+
+    include("../../mpi/runtests_np4_body.jl")
+
+    MPI.Finalize()
+
+ end #module
+ """
+ open("sysimagegenerator.jl","w") do io
+   println(io,source_code)
+ end
+end
+
+using Pkg
+using PackageCompiler
+generate_precompile_execution_file()
+pkgs = Symbol[]
+push!(pkgs, :TestApp)
+
+if VERSION >= v"1.4"
+    append!(pkgs, [Symbol(v.name) for v in values(Pkg.dependencies()) if v.is_direct_dep],)
+else
+    append!(pkgs, [Symbol(name) for name in keys(Pkg.installed())])
+end
+
+create_sysimage(pkgs,
+  sysimage_path=joinpath(@__DIR__,"TestApp.so"),
+  precompile_execution_file=joinpath(@__DIR__,"sysimagegenerator.jl"))
diff --git a/test/TestApp/compile/compile.sh b/test/TestApp/compile/compile.sh
new file mode 100755
index 00000000..0d2f9f19
--- /dev/null
+++ b/test/TestApp/compile/compile.sh
@@ -0,0 +1,8 @@
+#!/bin/bash
+
+# This script is to be executed from this folder (compile/)
+julia --project=../ --color=yes -e 'using Pkg; Pkg.instantiate()'
+# See https://juliaparallel.github.io/MPI.jl/latest/knownissues/#Julia-module-precompilation-1
+# for a justification of this line
+julia --project=../ --color=yes -e 'using Pkg; pkg"precompile"'
+julia --project=../ -O3 --check-bounds=no --color=yes compile.jl $1
diff --git a/test/CellDataTests.jl b/test/TestApp/src/CellDataTests.jl
similarity index 100%
rename from test/CellDataTests.jl
rename to test/TestApp/src/CellDataTests.jl
diff --git a/test/FESpacesTests.jl b/test/TestApp/src/FESpacesTests.jl
similarity index 100%
rename from test/FESpacesTests.jl
rename to test/TestApp/src/FESpacesTests.jl
diff --git a/test/GeometryTests.jl b/test/TestApp/src/GeometryTests.jl
similarity index 100%
rename from test/GeometryTests.jl
rename to test/TestApp/src/GeometryTests.jl
diff --git a/test/MultiFieldTests.jl b/test/TestApp/src/MultiFieldTests.jl
similarity index 100%
rename from test/MultiFieldTests.jl
rename to test/TestApp/src/MultiFieldTests.jl
diff --git a/test/PLaplacianTests.jl b/test/TestApp/src/PLaplacianTests.jl
similarity index 100%
rename from test/PLaplacianTests.jl
rename to test/TestApp/src/PLaplacianTests.jl
diff --git a/test/PoissonTests.jl b/test/TestApp/src/PoissonTests.jl
similarity index 100%
rename from test/PoissonTests.jl
rename to test/TestApp/src/PoissonTests.jl
diff --git a/test/TestApp/src/TestApp.jl b/test/TestApp/src/TestApp.jl
new file mode 100644
index 00000000..18165e57
--- /dev/null
+++ b/test/TestApp/src/TestApp.jl
@@ -0,0 +1,8 @@
+module TestApp
+  include("CellDataTests.jl")
+  include("FESpacesTests.jl")
+  include("GeometryTests.jl")
+  include("MultiFieldTests.jl")
+  include("PLaplacianTests.jl")
+  include("PoissonTests.jl")
+end 
diff --git a/test/mpi/runtests.jl b/test/mpi/runtests.jl
index 8e150ba0..122ab7d1 100644
--- a/test/mpi/runtests.jl
+++ b/test/mpi/runtests.jl
@@ -3,19 +3,30 @@ module MPITests
 using MPI
 using Test
 
+#Sysimage
+sysimage=nothing
+if length(ARGS)==1
+   @assert isfile(ARGS[1]) "$(ARGS[1]) must be a valid Julia sysimage file"
+   sysimage=ARGS[1]
+end
+
 mpidir = @__DIR__
 testdir = joinpath(mpidir,"..")
-repodir = joinpath(testdir,"..")
-
-function run_driver(procs,file)
+repodir = joinpath(testdir,"TestApp")
+function run_driver(procs,file,sysimage)
   mpiexec() do cmd
-    run(`$cmd -n $procs $(Base.julia_cmd()) --project=$repodir $(joinpath(mpidir,file))`)
+    if sysimage!=nothing
+       extra_args="-J$(sysimage)"
+       run(`$cmd -n $procs $(Base.julia_cmd()) $(extra_args) --project=$repodir $(joinpath(mpidir,file))`)
+    else
+       run(`$cmd -n $procs $(Base.julia_cmd()) --project=$repodir $(joinpath(mpidir,file))`)
+    end
     @test true
   end
 end
 
-run_driver(4,"runtests_np4.jl")
-run_driver(1,"runtests_np4.jl") # Check that the degenerated case works
+run_driver(4,"runtests_np4.jl",sysimage)
+run_driver(1,"runtests_np4.jl",sysimage) # Check that the degenerated case works
 
 
 end # module
diff --git a/test/mpi/runtests_np4.jl b/test/mpi/runtests_np4.jl
index e7cbd800..7ca2595f 100644
--- a/test/mpi/runtests_np4.jl
+++ b/test/mpi/runtests_np4.jl
@@ -1,6 +1,7 @@
 module NP4
 # All test running on 4 procs here
 
+using TestApp
 using PartitionedArrays
 const PArrays = PartitionedArrays
 using MPI
@@ -9,13 +10,6 @@ if ! MPI.Initialized()
   MPI.Init()
 end
 
-include("../GeometryTests.jl")
-include("../CellDataTests.jl")
-include("../FESpacesTests.jl")
-include("../MultiFieldTests.jl")
-include("../PoissonTests.jl")
-include("../PLaplacianTests.jl")
-
 if MPI.Comm_size(MPI.COMM_WORLD) == 4
   parts = get_part_ids(mpi,(2,2))
 elseif MPI.Comm_size(MPI.COMM_WORLD) == 1
@@ -24,30 +18,7 @@ else
   error()
 end
 
-display(parts)
-
-t = PArrays.PTimer(parts,verbose=true)
-PArrays.tic!(t)
-
-GeometryTests.main(parts)
-PArrays.toc!(t,"Geometry")
-
-CellDataTests.main(parts)
-PArrays.toc!(t,"CellData")
-
-FESpacesTests.main(parts)
-PArrays.toc!(t,"FESpaces")
-
-MultiFieldTests.main(parts)
-PArrays.toc!(t,"MultiField")
-
-PoissonTests.main(parts)
-PArrays.toc!(t,"Poisson")
-
-PLaplacianTests.main(parts)
-PArrays.toc!(t,"PLaplacian")
-
-display(t)
+include("runtests_np4_body.jl")
 
 MPI.Finalize()
 
diff --git a/test/mpi/runtests_np4_body.jl b/test/mpi/runtests_np4_body.jl
new file mode 100644
index 00000000..d3f5db14
--- /dev/null
+++ b/test/mpi/runtests_np4_body.jl
@@ -0,0 +1,24 @@
+display(parts)
+
+t = PArrays.PTimer(parts,verbose=true)
+PArrays.tic!(t)
+
+TestApp.GeometryTests.main(parts)
+PArrays.toc!(t,"Geometry")
+
+TestApp.CellDataTests.main(parts)
+PArrays.toc!(t,"CellData")
+
+TestApp.FESpacesTests.main(parts)
+PArrays.toc!(t,"FESpaces")
+
+TestApp.MultiFieldTests.main(parts)
+PArrays.toc!(t,"MultiField")
+
+TestApp.PoissonTests.main(parts)
+PArrays.toc!(t,"Poisson")
+
+TestApp.PLaplacianTests.main(parts)
+PArrays.toc!(t,"PLaplacian")
+
+display(t)
diff --git a/test/sequential/CellDataTests.jl b/test/sequential/CellDataTests.jl
index e3475d02..64678837 100644
--- a/test/sequential/CellDataTests.jl
+++ b/test/sequential/CellDataTests.jl
@@ -1,10 +1,9 @@
 module CellDataTestsSeq
 
 using PartitionedArrays
-
-include("../CellDataTests.jl")
+using TestApp
 
 parts = get_part_ids(sequential,(2,2))
-CellDataTests.main(parts)
+TestApp.CellDataTests.main(parts)
 
 end # module
diff --git a/test/sequential/FESpacesTests.jl b/test/sequential/FESpacesTests.jl
index b604fc30..919c4e11 100644
--- a/test/sequential/FESpacesTests.jl
+++ b/test/sequential/FESpacesTests.jl
@@ -1,11 +1,9 @@
 module FESpacesTestsSeq
 
 using PartitionedArrays
-
-include("../FESpacesTests.jl")
+using TestApp
 
 parts = get_part_ids(sequential,(2,2))
-FESpacesTests.main(parts)
+TestApp.FESpacesTests.main(parts)
 
 end # module
-
diff --git a/test/sequential/GeometryTests.jl b/test/sequential/GeometryTests.jl
index f3c641cd..d53efa41 100644
--- a/test/sequential/GeometryTests.jl
+++ b/test/sequential/GeometryTests.jl
@@ -1,13 +1,12 @@
 module GeometryTestsSeq
 
 using PartitionedArrays
-
-include("../GeometryTests.jl")
+using TestApp
 
 parts = get_part_ids(sequential,(2,2))
-GeometryTests.main(parts)
+TestApp.GeometryTests.main(parts)
 
 parts = get_part_ids(sequential,(2,2,2))
-GeometryTests.main(parts)
+TestApp.GeometryTests.main(parts)
 
 end
diff --git a/test/sequential/MultiFieldTests.jl b/test/sequential/MultiFieldTests.jl
index 7967dfa8..8efdf8c0 100644
--- a/test/sequential/MultiFieldTests.jl
+++ b/test/sequential/MultiFieldTests.jl
@@ -1,11 +1,9 @@
 module MultiFieldTestsSeq
 
 using PartitionedArrays
-
-include("../MultiFieldTests.jl")
+using TestApp
 
 parts = get_part_ids(sequential,(2,2))
-MultiFieldTests.main(parts)
+TestApp.MultiFieldTests.main(parts)
 
 end # module
-
diff --git a/test/sequential/PLaplacianTests.jl b/test/sequential/PLaplacianTests.jl
index ced09577..427b6855 100644
--- a/test/sequential/PLaplacianTests.jl
+++ b/test/sequential/PLaplacianTests.jl
@@ -1,10 +1,9 @@
 module PLaplacianTestsSeq
 
 using PartitionedArrays
-
-include("../PLaplacianTests.jl")
+using TestApp
 
 parts = get_part_ids(sequential,(2,2))
-PLaplacianTests.main(parts)
+TestApp.PLaplacianTests.main(parts)
 
 end # module
diff --git a/test/sequential/PoissonTests.jl b/test/sequential/PoissonTests.jl
index 2ada4780..d8c11b59 100644
--- a/test/sequential/PoissonTests.jl
+++ b/test/sequential/PoissonTests.jl
@@ -1,12 +1,9 @@
 module PoissonTestsSeq
 
+using TestApp
 using PartitionedArrays
 
-include("../PoissonTests.jl")
-
 parts = get_part_ids(sequential,(2,2))
-PoissonTests.main(parts)
+TestApp.PoissonTests.main(parts)
 
 end # module
-
-