diff --git a/.github/workflows/people.yml b/.github/workflows/people.yml
index f85b81f..df08008 100644
--- a/.github/workflows/people.yml
+++ b/.github/workflows/people.yml
@@ -126,6 +126,10 @@ jobs:
         run: |
           make migrate
 
+      - name: Add dummy data
+        run: |
+          make demo FLUSH_ARGS='--no-input'
+
       - name: Setup Node.js
         uses: actions/setup-node@v4
         with:
diff --git a/Makefile b/Makefile
index 052d03a..c440dea 100644
--- a/Makefile
+++ b/Makefile
@@ -204,9 +204,10 @@ dbshell: ## connect to database shell
 	docker compose exec app-dev python manage.py dbshell
 .PHONY: dbshell
 
+resetdb: FLUSH_ARGS ?=
 resetdb: ## flush database and create a superuser "admin"
 	@echo "$(BOLD)Flush database$(RESET)"
-	@$(MANAGE) flush
+	@$(MANAGE) flush $(FLUSH_ARGS)
 	@${MAKE} superuser
 .PHONY: resetdb