diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 38f7eb2..1f56c9f 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -115,6 +115,8 @@ jobs:
           extensions: pecl_http
       - name: Build ${{ env.PACKAGE_NAME }} + consumers
         run: |
+          composer require pcov/clobber
+          vendor/bin/pcov clobber
           cd ..\
           git clone https://github.com/Microsoft/php-sdk-binary-tools.git php-sdk
           .\php-sdk\phpsdk-vs16-x64.bat -t .\aws-crt-php\win_build.bat --task-args %CD%\aws-crt-php