diff --git a/Dockerfile b/Dockerfile
index c2b1ceb..697e7f6 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,6 +4,7 @@ FROM --platform=$TARGETPLATFORM ruby:3.2.2-slim
 RUN apt-get update && apt-get install -y --no-install-recommends \
     build-essential \
     chromium \
+    xvfb \
     chromium-driver \
     libpq-dev \
  && rm -rf /var/lib/apt/lists/*
diff --git a/README.md b/README.md
index 5404f22..b2fac41 100644
--- a/README.md
+++ b/README.md
@@ -41,6 +41,14 @@ This command launches the container with the current working directory set
 to `/app`, where your tests are mounted. From there you can run any
 commands you need, such as `bundle exec cucumber` or `bundle exec rspec`.
 
+
+If your tests require an X server, you can prefix the test command with
+`xvfb-run` to run them in a virtual framebuffer. For example:
+
+```bash
+xvfb-run bundle exec rspec
+```
+
 ## Testing Watir
 
 You can quickly verify that Watir is working inside the container by running a small script.
@@ -58,5 +66,4 @@ Run the script inside the container with:
 
 ```bash
 bundle exec ruby test_browser.rb
-```
-
+```
\ No newline at end of file