diff --git a/.github/workflows/mingw-ci.yml b/.github/workflows/mingw-ci.yml
index f886c93..8067363 100644
--- a/.github/workflows/mingw-ci.yml
+++ b/.github/workflows/mingw-ci.yml
@@ -46,4 +46,4 @@ jobs:
           cd build32
           cmake  -DFASTFLOAT_TEST=ON ..
           cmake --build .   --verbose
-          ctest -j4 --output-on-failure -R basictest
\ No newline at end of file
+          ctest --output-on-failure -R basictest
\ No newline at end of file
diff --git a/.github/workflows/mingw64-ci.yml b/.github/workflows/mingw64-ci.yml
index f476f2b..e8cbb0d 100644
--- a/.github/workflows/mingw64-ci.yml
+++ b/.github/workflows/mingw64-ci.yml
@@ -46,4 +46,4 @@ jobs:
           cd build64
           cmake  -DFASTFLOAT_TEST=ON ..
           cmake --build .   --verbose
-          ctest -j4 --output-on-failure -R basictest
\ No newline at end of file
+          ctest --verbose --output-on-failure -R basictest
\ No newline at end of file
diff --git a/.github/workflows/ubuntu18.yml b/.github/workflows/ubuntu18.yml
index a029f30..13b7eee 100644
--- a/.github/workflows/ubuntu18.yml
+++ b/.github/workflows/ubuntu18.yml
@@ -9,21 +9,21 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - {cxx: -DCMAKE_CXX_COMPILER=g++-5, arch:                         }
-          - {cxx: -DCMAKE_CXX_COMPILER=g++-6, arch:                         }
+          #- {cxx: -DCMAKE_CXX_COMPILER=g++-5, arch:                         }
+          #- {cxx: -DCMAKE_CXX_COMPILER=g++-6, arch:                         }
           - {cxx:                           , arch:                         } # default=gcc7
-          - {cxx:                           , arch: -DCMAKE_CXX_FLAGS="-m32"} # default=gcc7
+          #- {cxx:                           , arch: -DCMAKE_CXX_FLAGS="-m32"} # default=gcc7
     steps:
       - uses: actions/checkout@v2
       - name: Setup cmake
         uses: jwlawson/actions-setup-cmake@v1.4
         with:
           cmake-version: '3.11.x'
-      - name: Install older compilers
-        run: |
-          sudo -E dpkg --add-architecture i386
-          sudo -E apt-get update
-          sudo -E apt-get install -y --force-yes g++-5 g++-6 g++-5-multilib g++-6-multilib g++-multilib linux-libc-dev:i386 libc6:i386 libc6-dev:i386 libc6-dbg:i386
+      #- name: Install older compilers
+      #  run: |
+      #    sudo -E dpkg --add-architecture i386
+      #    sudo -E apt-get update
+      #    sudo -E apt-get install -y --force-yes g++-5 g++-6 g++-5-multilib g++-6-multilib g++-multilib linux-libc-dev:i386 libc6:i386 libc6-dev:i386 libc6-dbg:i386
       - name: Prepare build dir
         run: mkdir build
       - name: Configure
diff --git a/.github/workflows/ubuntu20.yml b/.github/workflows/ubuntu20.yml
index f026366..a0f519f 100644
--- a/.github/workflows/ubuntu20.yml
+++ b/.github/workflows/ubuntu20.yml
@@ -9,20 +9,20 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - {cxx: -DCMAKE_CXX_COMPILER=g++-8, arch:                         }
+          #- {cxx: -DCMAKE_CXX_COMPILER=g++-8, arch:                         }
           - {cxx:                           , arch:                         } # default=gcc9
-          - {cxx:                           , arch: -DCMAKE_CXX_FLAGS="-m32"} # default=gcc9
+          #- {cxx:                           , arch: -DCMAKE_CXX_FLAGS="-m32"} # default=gcc9
     steps:
       - uses: actions/checkout@v2
       - name: Setup cmake
         uses: jwlawson/actions-setup-cmake@v1.4
         with:
           cmake-version: '3.11.x'
-      - name: install older compilers
-        run: |
-          sudo -E dpkg --add-architecture i386
-          sudo -E apt-get update
-          sudo -E apt-get install -y g++-8 g++-8-multilib g++-multilib linux-libc-dev:i386 libc6:i386 libc6-dev:i386 libc6-dbg:i386
+      #- name: install older compilers
+      #  run: |
+      #    sudo -E dpkg --add-architecture i386
+      #    sudo -E apt-get update
+      #    sudo -E apt-get install -y g++-8 g++-8-multilib g++-multilib linux-libc-dev:i386 libc6:i386 libc6-dev:i386 libc6-dbg:i386
       - name: Prepare build dir
         run: mkdir build
       - name: Configure