diff --git a/appveyor.yml b/appveyor.yml
index d3a74148..9b7e4e69 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -5,7 +5,7 @@ configuration:
 install:
   - ps: Invoke-WebRequest -UserAgent wget -Uri http://sourceforge.net/projects/mingw-w64/files/Toolchains%20targetting%20Win64/Personal%20Builds/mingw-builds/4.9.0/threads-win32/seh/x86_64-4.9.0-release-win32-seh-rt_v3-rev2.7z/download -OutFile mingw.7z
   - dir
-  - 7z x -oC:\ mingw.7z
+  - 7z x -oC:\ mingw.7z > nul
   - set PATH=C:\Program Files (x86)\MSBuild\12.0\bin\;%PATH%;C:\wingw64\bin
 
 before_build: cmake -DFMT_EXTRA_TESTS=ON .