diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index b96bf8ba2..000000000
--- a/.travis.yml
+++ /dev/null
@@ -1,128 +0,0 @@
-# Travis CI is used to test platforms that github-actions currently doesn't support
-# without either self-hosting or some finnicky work-around. Also, some tests
-# are troublesome to migrate since GH Actions runs tests not in a tty.
-language: c
-
-git:
-  depth: 1
-
-branches:
-  only:
-  - dev
-  - release
-  - master
-  - travisTest
-
-addons:
-  apt:
-    update: true
-
-env:
-  global:
-    - FUZZERTEST=-T1mn
-      ZSTREAM_TESTTIME=-T1mn
-      DECODECORPUS_TESTTIME=-T1mn
-
-matrix:
-  fast_finish: true
-  include:
-    - name: S390X (big endian) + Fuzz test
-      dist: trusty
-      arch: s390x
-      script:
-        - FUZZER_FLAGS=--no-big-tests make -C tests fuzztest
-
-    - name: S390X (big endian) + Fuzz test + no intrinsics
-      dist: trusty
-      arch: s390x
-      script:
-        - MOREFLAGS="-DZSTD_NO_INTRINSICS" FUZZER_FLAGS=--no-big-tests make -C tests fuzztest
-
-    - name: arm64    # ~2.5 mn
-      os: linux
-      arch: arm64
-      script:
-        - make check
-
-    - name: arm64fuzz
-      os: linux
-      arch: arm64
-      script:
-        - make -C tests fuzztest
-
-    # TODO: migrate to GH Actions once newest clang staticanalyze warnings are fixed
-    - name: static analyzer scanbuild    # ~8mn
-      dist: trusty  # note : it's important to pin down a version of static analyzer, since different versions report different false positives
-      script:
-        - make staticAnalyze
-
-    # GH actions can't run this command on OS-X, non-tty issues
-    - name: OS-X make all lib
-      os: osx
-      script:
-        - make -C lib all
-
-    # Introduced to check compat with old toolchains, to prevent e.g. #1872
-    - name: ARM Build Test (on Trusty)
-      dist: trusty
-      script:
-        - make arminstall
-        - make armbuild
-
-    # check release number (release/new tag only)
-    - name: Tag-Specific Test
-      if: tag =~ ^v[0-9]\.[0-9]
-      script:
-        - make -C tests checkTag
-        - tests/checkTag "$TRAVIS_BRANCH"
-
-    - name: PPC64LE + Fuzz test  # ~13mn
-      arch: ppc64le
-      env:
-        - FUZZER_FLAGS=--no-big-tests
-        - MOREFLAGS="-static"
-      script:
-        - cat /proc/cpuinfo
-        - make -C tests fuzztest
-
-    # This test currently fails on GA specifically, for no obvious reason
-    # (it works fine on travisCI, and on local test platforms).
-    - name: Versions Compatibility Test   # ~6mn
-      script:
-        - make -C tests versionsTest
-
-    # meson dedicated test
-    - name: Focal (Meson + clang)    # ~15mn
-      dist: focal
-      language: cpp
-      compiler: clang
-      install:
-        - sudo apt-get install -qq liblz4-dev valgrind tree
-        - |
-          travis_retry curl -o ~/ninja.zip -L 'https://github.com/ninja-build/ninja/releases/download/v1.9.0/ninja-linux.zip' &&
-          unzip ~/ninja.zip -d ~/.local/bin
-        - |
-          travis_retry curl -o ~/get-pip.py -L 'https://bootstrap.pypa.io/pip/3.6/get-pip.py' &&
-          python3 ~/get-pip.py --user &&
-          pip3 install --user meson
-      script:
-        - |
-          meson setup \
-            --buildtype=debugoptimized \
-            -Db_lundef=false \
-            -Dauto_features=enabled \
-            -Dbin_programs=true \
-            -Dbin_tests=true \
-            -Dbin_contrib=true \
-            -Ddefault_library=both \
-             build/meson builddir
-        - pushd builddir
-        - ninja
-        - meson test --verbose --no-rebuild
-        - DESTDIR=./staging ninja install
-        - tree ./staging
-      after_failure:
-        - cat "$TRAVIS_BUILD_DIR"/builddir/meson-logs/testlog.txt
-
-  allow_failures:
-    - env: ALLOW_FAILURES=true
diff --git a/appveyor.yml b/appveyor.yml
deleted file mode 100644
index c58ef91a1..000000000
--- a/appveyor.yml
+++ /dev/null
@@ -1,205 +0,0 @@
-# Following tests are run _only_ on `release` branch
-# and on selected feature branch named `appveyorTest` or `visual*`
-
--
-  version: 1.0.{build}
-  branches:
-    only:
-    - release
-    - master
-    - /appveyor*/
-    - /visual*/
-  environment:
-    matrix:
-    - COMPILER: "gcc"
-      HOST:     "mingw"
-      PLATFORM: "x64"
-      SCRIPT:   "make allzstd MOREFLAGS=-static"
-      ARTIFACT: "true"
-      BUILD:    "true"
-    - COMPILER: "gcc"
-      HOST:     "mingw"
-      PLATFORM: "x86"
-      SCRIPT:   "make allzstd MOREFLAGS=-static"
-      ARTIFACT: "true"
-      BUILD:    "true"
-
-    - COMPILER: "clang-cl"
-      HOST:     "cmake-visual"
-      PLATFORM: "x64"
-      CONFIGURATION: "Release"
-      CMAKE_GENERATOR: "Visual Studio 15 2017"
-      CMAKE_GENERATOR_PLATFORM: "x64"
-      CMAKE_GENERATOR_TOOLSET: "LLVM"
-      APPVEYOR_BUILD_WORKER_IMAGE: "Visual Studio 2017"
-
-  install:
-  - ECHO Installing %COMPILER% %PLATFORM% %CONFIGURATION%
-  - SET PATH_ORIGINAL=%PATH%
-  - if [%HOST%]==[mingw] (
-      SET "PATH_MINGW32=C:\mingw-w64\i686-6.3.0-posix-dwarf-rt_v5-rev1\mingw32\bin" &&
-      SET "PATH_MINGW64=C:\mingw-w64\x86_64-6.3.0-posix-seh-rt_v5-rev1\mingw64\bin" &&
-      COPY C:\msys64\usr\bin\make.exe C:\mingw-w64\i686-6.3.0-posix-dwarf-rt_v5-rev1\mingw32\bin\make.exe &&
-      COPY C:\msys64\usr\bin\make.exe C:\mingw-w64\x86_64-6.3.0-posix-seh-rt_v5-rev1\mingw64\bin\make.exe
-    )
-  - IF [%HOST%]==[visual] IF [%PLATFORM%]==[x64] (
-      SET ADDITIONALPARAM=/p:LibraryPath="C:\Program Files\Microsoft SDKs\Windows\v7.1\lib\x64;c:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\lib\amd64;C:\Program Files (x86)\Microsoft Visual Studio 10.0\;C:\Program Files (x86)\Microsoft Visual Studio 10.0\lib\amd64;"
-    )
-
-  build_script:
-  - if [%HOST%]==[mingw] (
-      ( if [%PLATFORM%]==[x64] (
-        SET "PATH=%PATH_MINGW64%;%PATH_ORIGINAL%"
-      ) else if [%PLATFORM%]==[x86] (
-        SET "PATH=%PATH_MINGW32%;%PATH_ORIGINAL%"
-      ) )
-    )
-  - if [%HOST%]==[mingw] if [%BUILD%]==[true] (
-      make -v &&
-      sh -c "%COMPILER% -v" &&
-      ECHO Building zlib to static link &&
-      SET "CC=%COMPILER%" &&
-      sh -c "cd .. && git clone --depth 1 --branch v1.2.11 https://github.com/madler/zlib" &&
-      sh -c "cd ../zlib && make -f win32/Makefile.gcc libz.a"
-      ECHO Building zstd &&
-      SET "CPPFLAGS=-I../../zlib" &&
-      SET "LDFLAGS=../../zlib/libz.a" &&
-      sh -c "%SCRIPT%" &&
-      ( if [%COMPILER%]==[gcc] if [%ARTIFACT%]==[true]
-          ECHO Creating artifacts &&
-          ECHO %cd% &&
-          lib\dll\example\build_package.bat &&
-          make -C programs DEBUGFLAGS= clean zstd &&
-          cd programs\ && 7z a -tzip -mx9 zstd-win-binary-%PLATFORM%.zip zstd.exe &&
-          appveyor PushArtifact zstd-win-binary-%PLATFORM%.zip &&
-          cp zstd.exe ..\bin\zstd.exe &&
-          git clone --depth 1 --branch release https://github.com/facebook/zstd &&
-          cd zstd &&
-          git archive --format=tar release -o zstd-src.tar &&
-          ..\zstd -19 zstd-src.tar &&
-          appveyor PushArtifact zstd-src.tar.zst &&
-          certUtil -hashfile zstd-src.tar.zst SHA256 > zstd-src.tar.zst.sha256.sig &&
-          appveyor PushArtifact zstd-src.tar.zst.sha256.sig &&
-          cd ..\..\bin\ &&
-          7z a -tzip -mx9 zstd-win-release-%PLATFORM%.zip * &&
-          appveyor PushArtifact zstd-win-release-%PLATFORM%.zip
-      )
-    )
-  - if [%HOST%]==[cmake-visual] (
-      ECHO *** &&
-      ECHO *** Building %CMAKE_GENERATOR% ^(%CMAKE_GENERATOR_TOOLSET%^) %PLATFORM%\%CONFIGURATION% &&
-      PUSHD build\cmake &&
-      cmake -DBUILD_TESTING=ON . &&
-      cmake --build . --config %CONFIGURATION% -j4 &&
-      POPD &&
-      ECHO ***
-    )
-
-  test_script:
-  - ECHO Testing %COMPILER% %PLATFORM% %CONFIGURATION%
-  - SET "CC=gcc"
-  - SET "CXX=g++"
-  - if [%TEST%]==[cmake] (
-      mkdir build\cmake\build &&
-      cd build\cmake\build &&
-      SET FUZZERTEST=-T2mn &&
-      SET ZSTREAM_TESTTIME=-T2mn &&
-      cmake -G "Visual Studio 14 2015 Win64" .. &&
-      cd ..\..\.. &&
-      make clean
-    )
-
-
-# The following tests are for regular pushes
-# into `dev` or some feature branch
-# There run less tests, for shorter feedback loop
-
--
-  version: 1.0.{build}
-  environment:
-    matrix:
-    - COMPILER: "visual"
-      HOST:     "visual"
-      PLATFORM: "x64"
-      CONFIGURATION: "Debug"
-    - COMPILER: "visual"
-      HOST:     "visual"
-      PLATFORM: "Win32"
-      CONFIGURATION: "Debug"
-    - COMPILER: "visual"
-      HOST:     "visual"
-      PLATFORM: "x64"
-      CONFIGURATION: "Release"
-    - COMPILER: "visual"
-      HOST:     "visual"
-      PLATFORM: "Win32"
-      CONFIGURATION: "Release"
-
-    - COMPILER: "gcc"
-      HOST:     "cygwin"
-      PLATFORM: "x64"
-
-    - COMPILER: "clang-cl"
-      HOST:     "cmake-visual"
-      PLATFORM: "x64"
-      CONFIGURATION: "Release"
-      CMAKE_GENERATOR: "Visual Studio 15 2017"
-      CMAKE_GENERATOR_PLATFORM: "x64"
-      CMAKE_GENERATOR_TOOLSET: "LLVM"
-      APPVEYOR_BUILD_WORKER_IMAGE: "Visual Studio 2017"
-
-  install:
-  - ECHO Installing %COMPILER% %PLATFORM% %CONFIGURATION%
-  - SET PATH_ORIGINAL=%PATH%
-  - if [%HOST%]==[cygwin] (
-      ECHO Installing Cygwin Packages &&
-      C:\cygwin64\setup-x86_64.exe -qnNdO -R "C:\cygwin64" -g -P ^
-        gcc,^
-        cmake,^
-        make
-    )
-  - IF [%HOST%]==[visual] IF [%PLATFORM%]==[x64] (
-      SET ADDITIONALPARAM=/p:LibraryPath="C:\Program Files\Microsoft SDKs\Windows\v7.1\lib\x64;c:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\lib\amd64;C:\Program Files (x86)\Microsoft Visual Studio 10.0\;C:\Program Files (x86)\Microsoft Visual Studio 10.0\lib\amd64;"
-    )
-
-  build_script:
-  - ECHO Building %COMPILER% %PLATFORM% %CONFIGURATION%
-  - if [%HOST%]==[cygwin] (
-      set CHERE_INVOKING=yes &&
-      set CC=%COMPILER% &&
-      C:\cygwin64\bin\bash --login -c "
-        set -e;
-        cd build/cmake;
-        CFLAGS='-Werror' cmake -G 'Unix Makefiles' -DCMAKE_BUILD_TYPE=Debug -DZSTD_BUILD_TESTS:BOOL=ON -DZSTD_FUZZER_FLAGS=-T20s -DZSTD_ZSTREAM_FLAGS=-T20s -DZSTD_FULLBENCH_FLAGS=-i0 .;
-        make VERBOSE=1 -j;
-        ctest -V -L Medium;
-      "
-    )
-  - if [%HOST%]==[cmake-visual] (
-      ECHO *** &&
-      ECHO *** Building %CMAKE_GENERATOR% ^(%CMAKE_GENERATOR_TOOLSET%^) %PLATFORM%\%CONFIGURATION% &&
-      PUSHD build\cmake &&
-      cmake -DBUILD_TESTING=ON . &&
-      cmake --build . --config %CONFIGURATION% -j4 &&
-      POPD &&
-      ECHO ***
-    )
-  - if [%HOST%]==[visual] (
-      ECHO *** &&
-      ECHO *** Building Visual Studio 2012 %PLATFORM%\%CONFIGURATION% &&
-      ECHO *** &&
-      msbuild "build\VS2010\zstd.sln" /m /verbosity:minimal /property:PlatformToolset=v110 /p:ForceImportBeforeCppTargets=%APPVEYOR_BUILD_FOLDER%\build\VS2010\CompileAsCpp.props /t:Clean,Build /p:Platform=%PLATFORM% /p:Configuration=%CONFIGURATION% /logger:"C:\Program Files\AppVeyor\BuildAgent\Appveyor.MSBuildLogger.dll" &&
-      DIR build\VS2010\bin\%PLATFORM%_%CONFIGURATION%\*.exe &&
-      msbuild "build\VS2010\zstd.sln" /m /verbosity:minimal /property:PlatformToolset=v110 /t:Clean,Build /p:Platform=%PLATFORM% /p:Configuration=%CONFIGURATION% /logger:"C:\Program Files\AppVeyor\BuildAgent\Appveyor.MSBuildLogger.dll" &&
-      DIR build\VS2010\bin\%PLATFORM%_%CONFIGURATION%\*.exe
-    )
-
-
-  test_script:
-  - ECHO Testing %COMPILER% %PLATFORM% %CONFIGURATION%
-  - SET "FUZZERTEST=-T10s"
-  - if [%HOST%]==[mingw] (
-      set "CC=%COMPILER%" &&
-      make clean &&
-      make check
-    )
\ No newline at end of file