diff --git a/README.md b/README.md
index 2e6950f269..b6733fa2fa 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-[AppVeyor](https://ci.appveyor.com/project/dstebila/liboqs): ![Build status image](https://ci.appveyor.com/api/projects/status/9d2ts78x88r8wnii/branch/main?svg=true), [CircleCI](https://circleci.com/gh/open-quantum-safe/liboqs/tree/main): ![Build status image](https://circleci.com/gh/open-quantum-safe/liboqs/tree/main.svg?style=svg), [TravisCI](https://travis-ci.com/github/open-quantum-safe/liboqs): [![Build Status](https://travis-ci.com/open-quantum-safe/liboqs.svg?branch=main)](https://travis-ci.com/open-quantum-safe/liboqs)
+[CircleCI](https://circleci.com/gh/open-quantum-safe/liboqs/tree/main): ![Build status image](https://circleci.com/gh/open-quantum-safe/liboqs/tree/main.svg?style=svg), [TravisCI](https://travis-ci.com/github/open-quantum-safe/liboqs): [![Build Status](https://travis-ci.com/open-quantum-safe/liboqs.svg?branch=main)](https://travis-ci.com/open-quantum-safe/liboqs)
 
 liboqs
 ======================
diff --git a/appveyor.yml b/appveyor.yml
deleted file mode 100644
index 5a8f3052b5..0000000000
--- a/appveyor.yml
+++ /dev/null
@@ -1,66 +0,0 @@
-version: 1.0.{build}
-
-# TODO: Support Visual Studio 2017
-image: Visual Studio 2019
-
-platform: x64
-
-branches:
-  except:
-    - /main-new-.*/
-    - /ghactionsonly-.*/
-
-environment:
-  matrix:
-    - BUILD_SHARED: ON
-      COMPILER: cygwin
-      OQS_ALGS_ENABLED: All
-    - BUILD_SHARED: OFF
-      COMPILER: cygwin
-      OQS_ALGS_ENABLED: STD
-    - BUILD_SHARED: ON
-      OQS_USE_OPENSSL: ON
-      COMPILER: cygwin
-      OQS_ALGS_ENABLED: NIST_R4
-    - BUILD_SHARED: OFF
-      COMPILER: msvc2019
-      OQS_ALGS_ENABLED: NIST_R4
-    - BUILD_SHARED: OFF
-      COMPILER: msvc2019
-      OQS_USE_OPENSSL: ON
-      OQS_ALGS_ENABLED: All
-    - BUILD_SHARED: ON
-      COMPILER: msvc2019
-    - BUILD_SHARED: OFF
-      COMPILER: msys2
-    - BUILD_SHARED: ON
-      COMPILER: msys2
-
-for:
-  - matrix:
-      only:
-        - OQS_USE_OPENSSL: ON
-    before_build:
-      - cmd: |-
-             choco install openssl
-             SET "OPENSSL_ROOT_DIR=C:\OpenSSL-Win64"
-
-build_script:
-  - cmd: '%APPVEYOR_BUILD_FOLDER%\appveyor_build.bat'
-
-before_test:
-  - cmd: |-
-         SET "PATH=C:\Python37-x64;C:\Python37-x64\Scripts;%PATH%"
-         pip.exe install pytest pytest-xdist pyyaml
-
-test_script:
-  - cmd: |-
-         cd %APPVEYOR_BUILD_FOLDER%
-         set PATH=%APPVEYOR_BUILD_FOLDER%\build\bin;c:\cygwin64\bin;%PATH%
-         if not exist tmp (mkdir tmp) 
-         python -m pytest --numprocesses=auto -vv --maxfail=10 --ignore=tests/test_code_conventions.py --junitxml=build\test-results\pytest\test-results.xml
-
-after_test:
-  - ps: |-
-        $wc = New-Object 'System.Net.WebClient'
-        $wc.UploadFile("https://ci.appveyor.com/api/testresults/xunit/$($env:APPVEYOR_JOB_ID)", (Resolve-Path .\build\test-results\pytest\test-results.xml))
diff --git a/appveyor_build.bat b/appveyor_build.bat
deleted file mode 100644
index b24261bc6a..0000000000
--- a/appveyor_build.bat
+++ /dev/null
@@ -1,19 +0,0 @@
-@echo off
-IF %COMPILER%==cygwin (
-    @echo on
-    SET "PATH=C:\cywin64\bin;c:\cygwin64;%PATH%"
-    c:\cygwin64\bin\bash.exe -lc "setup-x86_64.exe -qnNdO -R C:/cygwin64 -l C:/cygwin/var/cache/setup -P openssl -P libssl-devel -P ninja -P cmake -P gcc && cd ${APPVEYOR_BUILD_FOLDER} && openssl version && cygcheck -c && pwd && mkdir build && cd build && cmake .. -GNinja -DCMAKE_C_COMPILER=gcc -DOQS_DIST_BUILD=ON -DBUILD_SHARED_LIBS=%BUILD_SHARED% -DOQS_USE_OPENSSL=%OQS_USE_OPENSSL% -DOQS_ALGS_ENABLED=%OQS_ALGS_ENABLED% && ninja "
-)
-IF %COMPILER%==msys2 (
-    @echo on
-    SET "PATH=C:\msys64\mingw64\bin;%PATH%"
-    bash -lc "cd ${APPVEYOR_BUILD_FOLDER} && mkdir build && cd build && cmake .. -GNinja -DOQS_DIST_BUILD=ON -DBUILD_SHARED_LIBS=%BUILD_SHARED% -DOQS_USE_OPENSSL=%OQS_USE_OPENSSL% -DOQS_ALGS_ENABLED=%OQS_ALGS_ENABLED% && ninja"
-)
-IF %COMPILER%==msvc2019 (
-    @echo on
-    CALL "C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Auxiliary\Build\vcvars64.bat"
-    mkdir build
-    cd build
-    cmake .. -GNinja -DOQS_DIST_BUILD=ON -DBUILD_SHARED_LIBS=%BUILD_SHARED% -DOQS_USE_OPENSSL=%OQS_USE_OPENSSL% -DOQS_ALGS_ENABLED=%OQS_ALGS_ENABLED%
-    ninja
-)
diff --git a/tests/helpers.py b/tests/helpers.py
index a12ebce842..fc22ef809f 100644
--- a/tests/helpers.py
+++ b/tests/helpers.py
@@ -137,9 +137,6 @@ def get_current_build_dir_name():
 
 def path_to_executable(program_name):
     path = "."
-    if sys.platform.startswith("win"):
-        if 'APPVEYOR_BUILD_FOLDER' not in os.environ: os.environ['APPVEYOR_BUILD_FOLDER'] = "."
-        path = os.path.join(path, os.environ['APPVEYOR_BUILD_FOLDER'])
     path = os.path.join(path, get_current_build_dir_name(), "tests")
     for executable in [
         os.path.join(path, program_name),
diff --git a/tests/test_cmdline.py b/tests/test_cmdline.py
index e146ee063d..5575fd4ffd 100644
--- a/tests/test_cmdline.py
+++ b/tests/test_cmdline.py
@@ -24,9 +24,6 @@ def test_kem(kem_name):
 @pytest.mark.parametrize('sig_name', helpers.available_sigs_by_name())
 def test_sig(sig_name):
     if not(helpers.is_sig_enabled_by_name(sig_name)): pytest.skip('Not enabled')
-    if sys.platform.startswith("win") and 'APPVEYOR' in os.environ:
-        if 'SPHINCS' in sig_name and ('192f' in sig_name or '192s' in sig_name or '256f' in sig_name or '256s' in sig_name):
-            pytest.skip('Skipping SPHINCS+ 192s and 256s tests on Windows AppVeyor builds')
     helpers.run_subprocess(
         [helpers.path_to_executable('test_sig'), sig_name],
     )