diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1d77b56932f..0ff49f8d3fd 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -7,8 +7,30 @@ name: ci
 on: [push, pull_request]
 
 jobs:
-  riscv-tests:
-    name: riscv-tests
+  build-riscv-tests:
+    name: build-riscv-tests
+    runs-on: ubuntu-latest
+    env:
+      RISCV: /riscv
+      NUM_JOBS: 4
+    steps:
+    - uses: actions/checkout@v2
+      with:
+        submodules: recursive
+    - name: Prepare
+      run: |
+          ci/setup.sh
+          tar -cf tools.tar tools
+          tar -cf tmp.tar tmp
+    - name: Archive production artifacts
+      uses: actions/upload-artifact@v3
+      with:
+        name: compiled-tools
+        path: |
+          tools.tar
+          tmp.tar
+  execute-riscv-tests:
+    name: execute-riscv-tests
     runs-on: ubuntu-latest
     strategy:
       matrix:
@@ -16,11 +38,19 @@ jobs:
         target: [cv64a6_imafdc_sv39, cv64a6_imafdc_sv39_wb]
     env:
       RISCV: /riscv
+    needs:
+      build-riscv-tests
     steps:
     - uses: actions/checkout@v2
       with:
         submodules: recursive
-    - name: Prepare
-      run: ci/setup.sh
-    - name: run tests
-      run: make run-${{ matrix.testcase}}-verilator target=${{ matrix.target }}
+    - name: Download a single artifact
+      uses: actions/download-artifact@v3
+      with:
+        name: compiled-tools
+    - name: Run Tests
+      run: |
+          tar xf tools.tar
+          tar xf tmp.tar
+          source verif/regress/install-cva6.sh
+          make run-${{ matrix.testcase}}-verilator target=${{ matrix.target }}
diff --git a/Makefile b/Makefile
index e78ebf7e2c2..c90baa71542 100644
--- a/Makefile
+++ b/Makefile
@@ -25,7 +25,8 @@ VCOM ?= vcom$(questa_version)
 VLIB ?= vlib$(questa_version)
 VMAP ?= vmap$(questa_version)
 # verilator version
-verilator      ?= $(PWD)/tmp/verilator-v5.008/verilator/bin/verilator
+VERILATOR_INSTALL_DIR ?= $(PWD)/tmp/verilator-v5.008/verilator/
+verilator             ?= verilator
 # traget option
 target-options ?=
 # additional defines
diff --git a/ci/setup.sh b/ci/setup.sh
index 47b1a528740..0340187188d 100755
--- a/ci/setup.sh
+++ b/ci/setup.sh
@@ -1,6 +1,7 @@
 #!/bin/bash
 set -e
-ROOT=$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)
+export ROOT=$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)
+export ROOT_PROJECT=$ROOT
 
 export PATH=$RISCV/bin:/bin:$PATH
 export LIBRARY_PATH=$RISCV/lib
@@ -15,13 +16,14 @@ sudo apt install device-tree-compiler
 
 ci/make-tmp.sh
 
-ci/install-verilator.sh
-
 sudo mkdir -p $RISCV && sudo chmod 777 $RISCV
 RISCV64_UNKNOWN_ELF_GCC=riscv64-unknown-elf-gcc-8.3.0-2020.04.0-x86_64-linux-ubuntu14.tar.gz
 if [ ! -f "$RISCV64_UNKNOWN_ELF_GCC" ]; then
   wget https://static.dev.sifive.com/dev-tools/$RISCV64_UNKNOWN_ELF_GCC
 fi
 tar -x -f $RISCV64_UNKNOWN_ELF_GCC --strip-components=1 -C $RISCV
-ci/install-fesvr.sh
+
+sudo apt install libfl-dev help2man
+
+verif/regress/install-cva6.sh
 ci/build-riscv-tests.sh
diff --git a/verif/regress/install-verilator.sh b/verif/regress/install-verilator.sh
index 26ed703e4d3..82e89634430 100755
--- a/verif/regress/install-verilator.sh
+++ b/verif/regress/install-verilator.sh
@@ -8,7 +8,7 @@
 # Original Author: Jean-Roch COULON - Thales
 
 if [ -z "$NUM_JOBS" ]; then
-    NUM_JOBS=1
+    NUM_JOBS=4
 fi
 
 # Ensure the location of tools is known (usually, .../core-v-verif/tools).
@@ -51,6 +51,7 @@ if [ ! -f "$VERILATOR_INSTALL_DIR/bin/verilator" ]; then
     echo "VERILATOR_BRANCH=$VERILATOR_BRANCH"
     echo "VERILATOR_HASH=$VERILATOR_HASH"
     echo "VERILATOR_PATCH=$VERILATOR_PATCH"
+    echo "NUM_JOBS=$NUM_JOBS"
     mkdir -p $VERILATOR_BUILD_DIR
     cd $VERILATOR_BUILD_DIR
     # Clone only if the ".git" directory does not exist.