diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index e682c4123d..757c43c5f4 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -209,6 +209,9 @@ phases:
        init "$sdk_path" "https://dev.azure.com/git-for-windows/git-sdk-64/_git/git-sdk-64" 0
        init usr\src\build-extra https://github.com/git-for-windows/build-extra 1
 
+       # Let Git ignore the SDK and the test-cache
+       "/git-sdk-64/`n/test-cache/`n" | Out-File -NoNewLine -Encoding ascii -Append "$(Build.SourcesDirectory)\.git\info\exclude"
+
        # Help MSYS2 runtime startup by initializing /etc/passwd
        & "$sdk_path\git-cmd" --command=usr\\bin\\bash.exe -lc "mkpasswd -c >>/etc/passwd"; c
     displayName: 'Initialize the Git for Windows SDK'