diff --git a/appveyor.yml b/appveyor.yml
index 40b6a22b..afcf89f2 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -23,7 +23,6 @@ build_script:
 - tools\build.bat %CONFIGURATION%
 
 test_script:
-- rem for %%f in ("build\VStudio\build\%CONFIGURATION%\winfsp-*.msi") do start /wait msiexec /i %%f /qn INSTALLLEVEL=1000
 - choco install winfsp -s build\VStudio\build\%CONFIGURATION%
 - if %TESTING%==Func appveyor DownloadFile http://www.secfs.net/winfsp/resources/Test.Filter.Driver.zip && 7z x Test.Filter.Driver.zip
 - if %TESTING%==Func start /wait msiexec /i "Test.Filter.Driver\HCK Filter.Driver Content-x86_en-us.msi" /qn
@@ -32,6 +31,7 @@ test_script:
 - if %TESTING%==Func tools\run-tests.bat %CONFIGURATION% ifstest
 - if %TESTING%==Func tools\run-tests.bat %CONFIGURATION% sample
 - if %TESTING%==Perf tools\run-perf-tests.bat %CONFIGURATION% baseline > perf-tests.csv && type perf-tests.csv & appveyor PushArtifact perf-tests.csv
+- choco uninstall winfsp
 - if exist %SystemRoot%\memory.dmp exit 1
 
 on_finish: