diff --git a/.pa11yci.js b/.pa11yci.js
new file mode 100644
index 0000000000..51d007655b
--- /dev/null
+++ b/.pa11yci.js
@@ -0,0 +1,20 @@
+const relativeUrls = require('./pa11y-ci-urls');
+
+const chromiumBin = process.env.CHROMIUM_BIN;
+if (!chromiumBin) {
+  throw new Error('CHROME_BIN environment variable is not set');
+}
+
+const baseUrl = 'http://localhost:4000';
+
+module.exports = {
+  defaults: {
+    chromeLaunchConfig: {
+      executablePath: chromiumBin,
+    },
+    ignore: [
+      'WCAG2AA.Principle1.Guideline1_4.1_4_3.G18.Fail', // colour contrast, which is a known issue
+    ],
+  },
+  urls: relativeUrls.map((url) => `${baseUrl}${url}`),
+};