diff --git a/autobahn/docker/autobahn/Dockerfile b/autobahn/docker/autobahn/Dockerfile
index 0726c39..e2e6a52 100644
--- a/autobahn/docker/autobahn/Dockerfile
+++ b/autobahn/docker/autobahn/Dockerfile
@@ -1,16 +1,6 @@
-# Based on https://github.com/crossbario/autobahn-testsuite/blob/09cfbf74b0c8e335c6fc7df88e5c88349ca66879/docker/Dockerfile
-
-FROM pypy:2-slim
-
-# make "pypy" available as "python"
-RUN ln -s /usr/local/bin/pypy /usr/local/bin/python
-
-# We need this to fix pip & cryptography
-RUN apt-get update && apt-get install -y build-essential libssl-dev
-
-# install Autobahn|Testsuite
-RUN pip install -U pip typing && \
-	pip install autobahntestsuite=='0.8.2'
+# Use the upstream Autobahn|Testsuite image, pinned by version so that CI runs
+# are reproducible; bump it deliberately.
+FROM crossbario/autobahn-testsuite:25.10.1
 
 VOLUME /config
 VOLUME /report
diff --git a/autobahn/docker/server/Dockerfile b/autobahn/docker/server/Dockerfile
index e457c61..01757a5 100644
--- a/autobahn/docker/server/Dockerfile
+++ b/autobahn/docker/server/Dockerfile
@@ -1,4 +1,8 @@
-FROM golang:1.20.2-alpine3.17
+# GO_VERSION is passed by autobahn/script/test.sh from the host's
+# `go env GOVERSION`, so the server under test is built with the same Go as the
+# CI matrix entry. The default is only a fallback for manual builds.
+ARG GO_VERSION=1.27
+FROM golang:${GO_VERSION}-alpine
 
 WORKDIR /go/src/github.com/gobwas/ws
 
diff --git a/autobahn/script/test.sh b/autobahn/script/test.sh
index 99fe120..a4785a5 100755
--- a/autobahn/script/test.sh
+++ b/autobahn/script/test.sh
@@ -2,6 +2,14 @@
 
 FOLLOW_LOGS=0
 
+# Build the server image with the same Go version as the host (e.g. the CI
+# matrix entry). GO_VERSION may be set explicitly to override it.
+GO_VERSION="${GO_VERSION:-$(go env GOVERSION 2>/dev/null | sed 's/^go//')}"
+SERVER_BUILD_ARGS=()
+if [[ -n "$GO_VERSION" ]]; then
+	SERVER_BUILD_ARGS+=(--build-arg "GO_VERSION=$GO_VERSION")
+fi
+
 while [[ $# -gt 0 ]]; do
 	key="$1"
 	case $key in
@@ -13,16 +21,16 @@ while [[ $# -gt 0 ]]; do
 		--build)
 		case "$2" in
 			autobahn)
-				docker build . --file autobahn/docker/autobahn/Dockerfile --tag ws-autobahn
+				docker build . --file autobahn/docker/autobahn/Dockerfile --tag ws-autobahn || exit 1
 				shift
 			;;
 			server)
-				docker build . --file autobahn/docker/server/Dockerfile --tag ws-server
+				docker build . --file autobahn/docker/server/Dockerfile --tag ws-server "${SERVER_BUILD_ARGS[@]}" || exit 1
 				shift
 			;;
 			*)
-				docker build . --file autobahn/docker/autobahn/Dockerfile --tag ws-autobahn
-				docker build . --file autobahn/docker/server/Dockerfile --tag ws-server
+				docker build . --file autobahn/docker/autobahn/Dockerfile --tag ws-autobahn || exit 1
+				docker build . --file autobahn/docker/server/Dockerfile --tag ws-server "${SERVER_BUILD_ARGS[@]}" || exit 1
 			;;
 		esac
 		;;