diff --git a/Makefile b/Makefile
index 87e0a8f0..0eea204a 100644
--- a/Makefile
+++ b/Makefile
@@ -265,7 +265,9 @@ code-check-userfront-e2e-tests:
 		(cd "$$tmp_dir/userfront-e2e" && $(PLAYWRIGHT_INSTALL_CHROMIUM)) || status=$$?; \
 	fi; \
 	if [ $$status -eq 0 ]; then \
-		(cd "$$tmp_dir/userfront-e2e" && npm test) || status=$$?; \
+		port="$$(node -e "const net=require('node:net'); const s=net.createServer(); s.listen(0,'127.0.0.1',()=>{console.log(s.address().port); s.close();});")"; \
+		echo "==> userfront-e2e using PORT=$$port"; \
+		(cd "$$tmp_dir/userfront-e2e" && PORT=$$port npm test) || status=$$?; \
 	fi; \
 	[ -d "$$tmp_dir/userfront-e2e/playwright-report" ] && cp -R "$$tmp_dir/userfront-e2e/playwright-report" reports/userfront-e2e/ || true; \
 	[ -d "$$tmp_dir/userfront-e2e/test-results" ] && cp -R "$$tmp_dir/userfront-e2e/test-results" reports/userfront-e2e/ || true; \