2 files changed, 8 insertions, 4 deletions
diff --git a/tests/docker/dockerfiles/centos7.docker b/tests/docker/dockerfiles/centos7.docker
index cdd72de7eb..9a2a2e515d 100644
--- a/tests/docker/dockerfiles/centos7.docker
+++ b/tests/docker/dockerfiles/centos7.docker
@@ -2,6 +2,8 @@ FROM centos:7
 RUN yum install -y epel-release centos-release-xen-48
 
 RUN yum -y update
+
+# Please keep this list sorted alphabetically
 ENV PACKAGES \
     bison \
     bzip2 \
@@ -19,6 +21,7 @@ ENV PACKAGES \
     libepoxy-devel \
     libfdt-devel \
     librdmacm-devel \
+    libzstd-devel \
     lzo-devel \
     make \
     mesa-libEGL-devel \
@@ -33,7 +36,6 @@ ENV PACKAGES \
     tar \
     vte-devel \
     xen-devel \
-    zlib-devel \
-    libzstd-devel
+    zlib-devel
 RUN yum install -y $PACKAGES
 RUN rpm -q $PACKAGES | sort > /packages.txt
diff --git a/tests/docker/dockerfiles/fedora.docker b/tests/docker/dockerfiles/fedora.docker
index a6522228c0..019eb12dcb 100644
--- a/tests/docker/dockerfiles/fedora.docker
+++ b/tests/docker/dockerfiles/fedora.docker
@@ -1,4 +1,6 @@
 FROM fedora:30
+
+# Please keep this list sorted alphabetically
 ENV PACKAGES \
     bc \
     bison \
@@ -38,6 +40,7 @@ ENV PACKAGES \
     libubsan \
     libusbx-devel \
     libxml2-devel \
+    libzstd-devel \
     llvm \
     lzo-devel \
     make \
@@ -92,8 +95,7 @@ ENV PACKAGES \
     vte291-devel \
     which \
     xen-devel \
-    zlib-devel \
-    libzstd-devel
+    zlib-devel
 ENV QEMU_CONFIGURE_OPTS --python=/usr/bin/python3
 
 RUN dnf install -y $PACKAGES