diff --git a/test/docker/Dockerfile b/test/docker/Dockerfile
index 5e318b40..c7ed1dba 100644
--- a/test/docker/Dockerfile
+++ b/test/docker/Dockerfile
@@ -23,6 +23,7 @@ RUN pacman -Sy
 RUN pacman --noconfirm -S rubygems ruby-rdoc pacutils expect aur
 RUN sudo -u aconfmgr gem install bashcov
 
+ENV ACONFMGR_IN_CONTAINER=1
 RUN /opt/aur/setup.sh
 
 RUN useradd billy
diff --git a/test/docker/Dockerfile.arch b/test/docker/Dockerfile.arch
index 44d22688..15e50e6c 100644
--- a/test/docker/Dockerfile.arch
+++ b/test/docker/Dockerfile.arch
@@ -8,8 +8,9 @@ FROM scratch
 
 COPY --from=rootfs /root.x86_64/ /
 
-RUN pacman-key --init
-RUN pacman-key --populate
+# Signatures are not timestamped, therefore always
+# become invalid after some time when the key expires
+RUN sed -i "s/^SigLevel.*/SigLevel = Never/" /etc/pacman.conf
 
 ARG arch_date
 RUN echo 'Server=https://archive.archlinux.org/repos/'"${arch_date}"'/$repo/os/$arch' > /etc/pacman.d/mirrorlist
diff --git a/test/docker/aur/PKGBUILD b/test/docker/aur/PKGBUILD
index d8b7da63..a31dbb72 100644
--- a/test/docker/aur/PKGBUILD
+++ b/test/docker/aur/PKGBUILD
@@ -21,8 +21,8 @@ md5sums=('SKIP'
          '9cd425efe85356ca36f08e2dc773f31f'
          'f0e1159864a04bad3b1f903bc7301d80'
          '718c816fdaedb644f5b4d0cd742dbc97'
-         '05f52abd3c84a79f4ef10681d9e5a133'
-         '12c4adba5530e989c8d9067972cbcbae')
+         '465c05c00d4127eca4ba49e9122ca492'
+         '5b0d438efd0d35ca3a1ee2331db0985c')
 
 _aur_uid=500
 _aur_gid=500
diff --git a/test/docker/aur/setup.sh b/test/docker/aur/setup.sh
index 305ba79f..3a3eba29 100644
--- a/test/docker/aur/setup.sh
+++ b/test/docker/aur/setup.sh
@@ -1,7 +1,7 @@
 #!/bin/bash
 set -eEuo pipefail
 
-if [[ ! -f /.dockerenv ]]
+if [[ ! -v ACONFMGR_IN_CONTAINER ]]
 then
 	echo 'Refusing to run setup outside Docker.'
 	exit 1
diff --git a/test/docker/aur/start.sh b/test/docker/aur/start.sh
index 47bd5b5c..2a01937e 100644
--- a/test/docker/aur/start.sh
+++ b/test/docker/aur/start.sh
@@ -1,7 +1,7 @@
 #!/bin/bash
 set -eEuo pipefail
 
-if [[ ! -f /.dockerenv ]]
+if [[ ! -v ACONFMGR_IN_CONTAINER ]]
 then
 	echo 'Refusing to start outside Docker.'
 	exit 1
diff --git a/test/docker/build-aur.sh b/test/docker/build-aur.sh
index 95926416..00486a36 100755
--- a/test/docker/build-aur.sh
+++ b/test/docker/build-aur.sh
@@ -19,6 +19,7 @@ pacman_opts+=(--noconfirm)
 mkdir /aconfmgr-packages
 
 chown -R nobody: aur
+chmod +x /aconfmgr{,/test{,/docker{,/aur}}}
 env -i -C aur su -s /bin/bash nobody -c 'makepkg --printsrcinfo' > aur/.SRCINFO
 AconfMakePkgDir aur false false "$PWD"/aur
 
diff --git a/test/t/lib-funcs-integ.bash b/test/t/lib-funcs-integ.bash
index 96d32db2..4bdbbea9 100644
--- a/test/t/lib-funcs-integ.bash
+++ b/test/t/lib-funcs-integ.bash
@@ -374,8 +374,13 @@ function TestInitAUR() {
 
 	LogEnter 'Initializing AUR support...\n'
 
+	if [[ ! -v ACONFMGR_IN_CONTAINER ]]
+	then
+		FatalError 'Refusing to start outside Docker.\n'
+	fi
+
 	LogEnter 'Starting AUR...\n'
-	command sudo /opt/aur/start.sh
+	command sudo env ACONFMGR_IN_CONTAINER=1 /opt/aur/start.sh
 	LogLeave
 
 	LogEnter 'Generating a SSH key...\n'