diff --git a/lighthouse-core/scripts/c8.sh b/lighthouse-core/scripts/c8.sh
index f73f08306900..4343ec1e809c 100644
--- a/lighthouse-core/scripts/c8.sh
+++ b/lighthouse-core/scripts/c8.sh
@@ -11,9 +11,10 @@ set -euxo pipefail
 echo $*
 
 node node_modules/.bin/c8 \
-  --include '{lighthouse-core,lighthouse-cli,lighthouse-viewer,lighthouse-treemap}' \
+  --include '{lighthouse-core,lighthouse-cli,lighthouse-viewer,lighthouse-treemap,report,flow-report}' \
   --exclude third_party \
   --exclude '**/test/' \
   --exclude '**/scripts/' \
   --exclude 'lighthouse-core/lib/page-functions.js' \
+  --temp-directory 'coverage/tmp' \
   $*