diff --git a/.buildbot/node/Dockerfile b/.buildbot/node/Dockerfile
index 24e1f58..84a2a2f 100644
--- a/.buildbot/node/Dockerfile
+++ b/.buildbot/node/Dockerfile
@@ -1,7 +1,8 @@
 FROM node:18-bullseye
 
 RUN apt-get update
-RUN apt-get install -yq --no-install-suggests --no-install-recommends xauth xvfb
+RUN apt-get install -yq --no-install-suggests --no-install-recommends \
+    xauth xvfb chromium firefox-esr
 
 WORKDIR /app
 COPY package*.json binding.gyp *.cc ./
diff --git a/.buildbot/node/test.sh b/.buildbot/node/test.sh
index b41801e..2ae9d71 100755
--- a/.buildbot/node/test.sh
+++ b/.buildbot/node/test.sh
@@ -1,3 +1,3 @@
 #!/bin/sh
 
-npm test
+CHROME_BIN=/usr/bin/chromium npm test