diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index 08526574..522df23b 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -61,6 +61,15 @@ stages:
         displayName: 'Runner Tests'
         timeoutInMinutes: 100
         steps:
+          - script: |
+              echo '=== disk usage before cleanup ==='
+              df -h /
+              sudo du -sh /usr/share/dotnet /usr/local/lib/android /opt/ghc /usr/local/.ghcup /opt/hostedtoolcache 2>/dev/null | sort -h || true
+              sudo rm -rf /usr/share/dotnet /usr/local/lib/android /opt/ghc /usr/local/.ghcup /opt/hostedtoolcache/CodeQL
+              docker system prune -af || true
+              echo '=== disk usage after cleanup ==='
+              df -h /
+            displayName: 'Free disk space'
           - script: |
               docker compose build --pull
               docker compose run tests ./vendor/bin/phpunit --testsuite runner-tests