diff --git a/appveyor.yml b/appveyor.yml
index 2c5e09a5..9f9c5b76 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -20,6 +20,7 @@ configuration:
 environment:
     VCPKG_SCRIPT: scripts/buildsystems/vcpkg.cmake
     ENABLE_CODE_COVERAGE: OFF
+    HAVE_PRECISE_TIMER: ON
 
 matrix:
     allow_failures:
@@ -47,7 +48,7 @@ for:
     environment:
         WS: /Users/appveyor/projects
         TRIPLET: $PLATFORM-osx
-#        ENABLE_CODE_COVERAGE: ON
+        HAVE_PRECISE_TIMER: OFF
     cache:
         #- $WS/vcpkg
         - $WS/vcpkg/installed
@@ -56,20 +57,8 @@ for:
         - sh: brew install p7zip #lcov
         - sh: cd $WS && git clone https://github.com/Microsoft/vcpkg.git
         - sh: cd $APPVEYOR_BUILD_FOLDER
-        # /Library/Developer/CommandLineTools/usr/bin/llvm-cov
-        #- sh: sudo find / -name llvm-cov 2> /dev/null
-        #- sh: llvm-cov --help
     test_script:
         - sh: ctest -V
-        #- sh: find . -name *.gcda
-        #- sh:  echo '#!/bin/bash' > g.sh
-        #- sh: echo 'exec  /Library/Developer/CommandLineTools/usr/bin/llvm-cov gcov "$@"' >> g.sh
-        #- sh: chmod +x g.sh
-        #- sh: ./g.sh -f -b -u $(find . -name *.gcda)
-        #- sh: lcov --directory . --base-directory . --gcov-tool ./g.sh --capture -o cov.info
-        #- sh: lcov --remove cov.info '/Applications/*' --output-file coverage.info
-        #- sh: lcov --list coverage.info
-        #- sh: bash <(curl -s https://codecov.io/bash) -f coverage.info -t b8f07100-6985-49f7-aa4c-14e36f29ac80
 
 skip_commits:
   files:
@@ -83,7 +72,6 @@ skip_commits:
 cache:
     - C:\tools\vcpkg\installed
 
-
 install:
     - cmd: if "%PLATFORM%" == "x64" call "C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Auxiliary\Build\vcvars64.bat"
     - cmd: if "%PLATFORM%" == "x86" call "C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Auxiliary\Build\vcvars32.bat"
@@ -104,7 +92,7 @@ build_script:
     - mkdir out
     - cd out
     - cmd: cmake -G "Ninja" -DCMAKE_BUILD_TYPE=%CONFIGURATION% -DWITH_SDL2_STATIC=OFF -DBUILD_SNAPSHOT=OFF  -DCMAKE_TOOLCHAIN_FILE=c:/tools/vcpkg/%VCPKG_SCRIPT% ..
-    - sh : cmake -DCMAKE_BUILD_TYPE=$CONFIGURATION -DWITH_SDL2_STATIC=ON -DBUILD_SNAPSHOT=OFF -DENABLE_CODE_COVERAGE=$ENABLE_CODE_COVERAGE -DCMAKE_TOOLCHAIN_FILE=$WS/vcpkg/$VCPKG_SCRIPT ..   
+    - sh : cmake -DCMAKE_BUILD_TYPE=$CONFIGURATION -DWITH_SDL2_STATIC=ON -DBUILD_SNAPSHOT=OFF -DENABLE_CODE_COVERAGE=$ENABLE_CODE_COVERAGE -DHAVE_PRECISE_TIMER=$HAVE_PRECISE_TIMER -DCMAKE_TOOLCHAIN_FILE=$WS/vcpkg/$VCPKG_SCRIPT ..   
     - cmake --build .
 
 test_script: