diff --git a/contrib/appveyor.yml b/contrib/appveyor.yml
index a5b0ab98b0..bcb410559b 100644
--- a/contrib/appveyor.yml
+++ b/contrib/appveyor.yml
@@ -15,7 +15,7 @@ environment:
     GENERATOR: Visual Studio 16
     CMAKE_PATH_PREFIX: C:\Qt\5.15\msvc2019_64\lib\cmake
 configuration:
-- RelWithDebInfo
+- Debug
 matrix:
   fast_finish: false
 install:
@@ -32,14 +32,14 @@ build_script:
 - echo %PATH%
 - mkdir build
 - cd build
-- cmake -G "%GENERATOR%" -DCMAKE_PREFIX_PATH="%CMAKE_PATH_PREFIX%" -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=../INSTALL %EXTRA_CMAKE_ARGS% ..
-- cmake --build . --config Release --target install
+- cmake -G "%GENERATOR%" -DCMAKE_PREFIX_PATH="%CMAKE_PATH_PREFIX%" -DCMAKE_BUILD_TYPE=Debug -DCMAKE_INSTALL_PREFIX=../INSTALL %EXTRA_CMAKE_ARGS% ..
+- cmake --build . --config Debug --target install
 - cpack --verbose -G WIX
 test_script:
 - set PATH=%QTPATH%;%QTPATH%/bin;%PATH%
 - echo %PATH%
 - cd "%APPVEYOR_BUILD_FOLDER%"/build
-- ctest -VV -C Release
+- ctest -VV -C Debug
 - ps: (Get-Item "$($env:APPVEYOR_BUILD_FOLDER)\INSTALL\bin\nvim-qt.exe").VersionInfo
 artifacts:
 - path: INSTALL
@@ -55,5 +55,5 @@ deploy:
     prerelease: false
     on:
       appveyor_repo_tag: true
-      configuration: RelWithDebInfo
+      configuration: Debug
       release_artifact: true