diff --git a/Taskfile.yml b/Taskfile.yml
index 20693b86c..1314afddb 100644
--- a/Taskfile.yml
+++ b/Taskfile.yml
@@ -162,6 +162,7 @@ tasks:
     cmds:
       - yarn webpack-dev
       - "{{.VIRTUAL_ENV}}/bin/python3 --version"
+      - bash -c 'rm -rf ./out/test-resources ./out/ext'
       - ' {{.XVFB}} bash -c ''source "{{.VIRTUAL_ENV}}/bin/activate" && yarn _coverage-ui-with-mock-lightspeed-server'''
     interactive: true
   test-unit: