diff --git a/test/palemoon/Dockerfile b/test/palemoon/Dockerfile
new file mode 100644
index 00000000..24b8ff52
--- /dev/null
+++ b/test/palemoon/Dockerfile
@@ -0,0 +1,14 @@
+FROM golang:alpine AS build
+
+RUN go install github.com/mattn/goreman@latest
+
+FROM debian:latest AS run
+RUN apt-get update -y && \
+  apt-get install -y tigervnc-standalone-server dwm xterm && \
+  rm -rf /var/lib/apt/lists
+ENV VNC_DESKTOP_NAME="Xtigervnc"
+ENV VNC_GEOMETRY=1280x800
+COPY app/ /app/
+COPY --from=build /go/bin/goreman /usr/bin/goreman
+
+CMD ["/app/main.sh"]
\ No newline at end of file
diff --git a/test/palemoon/Dockerfile.palemoon b/test/palemoon/Dockerfile.palemoon
new file mode 100644
index 00000000..afc045f4
--- /dev/null
+++ b/test/palemoon/Dockerfile.palemoon
@@ -0,0 +1,8 @@
+FROM debian:latest
+
+RUN apt-get update \
+  && apt-get -y install ca-certificates
+COPY palemoon.list /etc/apt/sources.list.d/palemoon.list
+COPY veit@kannegieser.net.gpg /usr/share/keyrings/veit@kannegieser.net.gpg
+RUN apt-get update \
+  && apt-get install -y palemoon veit-kannegieser-archive-keyring
\ No newline at end of file
diff --git a/test/palemoon/README.md b/test/palemoon/README.md
new file mode 100644
index 00000000..397182d6
--- /dev/null
+++ b/test/palemoon/README.md
@@ -0,0 +1,5 @@
+# Pale Moon CI tests
+
+Pale Moon has exposed [some pretty bad bugs](https://anubis.techaro.lol/blog/release/v1.21.1#fix-event-loop-thrashing-when-solving-a-proof-of-work-challenge) in Anubis. As such, we're running Pale Moon against Anubis in CI to ensure that it keeps working.
+
+This test is a fork of [dtinth/xtigervnc-docker](https://github.com/dtinth/xtigervnc-docker) but focused on Pale Moon.
diff --git a/test/palemoon/anubis/anubis.yaml b/test/palemoon/anubis/anubis.yaml
new file mode 100644
index 00000000..bc840ba4
--- /dev/null
+++ b/test/palemoon/anubis/anubis.yaml
@@ -0,0 +1,12 @@
+bots:
+  - name: palemoon
+    user_agent_regex: PaleMoon
+    action: CHALLENGE
+    challenge:
+      difficulty: 4
+      report_as: 4
+      algorithm: fast
+
+status_codes:
+  CHALLENGE: 401
+  DENY: 403
diff --git a/test/palemoon/app/Procfile b/test/palemoon/app/Procfile
new file mode 100644
index 00000000..26fedb14
--- /dev/null
+++ b/test/palemoon/app/Procfile
@@ -0,0 +1,2 @@
+xtigervnc: ./xtigervnc.sh
+dwm: ./dwm.sh
\ No newline at end of file
diff --git a/test/palemoon/app/dwm.sh b/test/palemoon/app/dwm.sh
new file mode 100755
index 00000000..2551daf7
--- /dev/null
+++ b/test/palemoon/app/dwm.sh
@@ -0,0 +1,6 @@
+#!/bin/bash
+export DISPLAY=:0
+while true; do
+    dwm
+    sleep 1
+done
diff --git a/test/palemoon/app/main.sh b/test/palemoon/app/main.sh
new file mode 100755
index 00000000..7d00e82c
--- /dev/null
+++ b/test/palemoon/app/main.sh
@@ -0,0 +1,3 @@
+#!/bin/bash -e
+cd /app
+goreman start
diff --git a/test/palemoon/app/xtigervnc.sh b/test/palemoon/app/xtigervnc.sh
new file mode 100755
index 00000000..6a298166
--- /dev/null
+++ b/test/palemoon/app/xtigervnc.sh
@@ -0,0 +1,2 @@
+#!/bin/bash -e
+exec Xtigervnc -desktop "$VNC_DESKTOP_NAME" -geometry "$VNC_GEOMETRY" -listen tcp -ac -SecurityTypes None -AlwaysShared -AcceptKeyEvents -AcceptPointerEvents -SendCutText -AcceptCutText :0
\ No newline at end of file
diff --git a/test/palemoon/docker-compose.yml b/test/palemoon/docker-compose.yml
new file mode 100644
index 00000000..71d28cdd
--- /dev/null
+++ b/test/palemoon/docker-compose.yml
@@ -0,0 +1,26 @@
+services:
+  display:
+    build: .
+    volumes:
+      - ./app:/app:ro
+  novnc:
+    image: geek1011/easy-novnc
+    command: -a :5800 -h display --no-url-password
+    ports:
+      - 5800:5800
+  palemoon-386:
+    hostname: i386
+    platform: linux/386
+    build:
+      dockerfile: Dockerfile.palemoon
+    command: sleep inf
+    environment:
+      DISPLAY: display:0
+  palemoon-amd64:
+    hostname: amd64
+    platform: linux/amd64
+    build:
+      dockerfile: Dockerfile.palemoon
+    command: sleep inf
+    environment:
+      DISPLAY: display:0
diff --git a/test/palemoon/palemoon.list b/test/palemoon/palemoon.list
new file mode 100644
index 00000000..7fd97aca
--- /dev/null
+++ b/test/palemoon/palemoon.list
@@ -0,0 +1 @@
+deb [           signed-by=/usr/share/keyrings/veit@kannegieser.net.gpg] https://kannegieser.net/palemoon mx23_gtk3 main
\ No newline at end of file
diff --git a/test/palemoon/test.sh b/test/palemoon/test.sh
new file mode 100644
index 00000000..f601227e
--- /dev/null
+++ b/test/palemoon/test.sh
@@ -0,0 +1,9 @@
+export VERSION=$GITHUB_COMMIT-test
+export KO_DOCKER_REPO=ko.local
+
+set -u
+
+(
+  cd ../.. &&
+    ko build --platform=all --base-import-paths --tags="latest" --image-user=1000 --image-annotation="" --image-label="" ./cmd/anubis -L
+)
diff --git a/test/palemoon/veit@kannegieser.net.gpg b/test/palemoon/veit@kannegieser.net.gpg
new file mode 100644
index 00000000..a335b5b4
Binary files /dev/null and b/test/palemoon/veit@kannegieser.net.gpg differ