While at it remove the bogus :latest tag for cris cross compiler. It
tends to break caching and cause confusion.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>

diff --git a/tests/docker/dockerfiles/fedora-cris-cross.docker b/tests/docker/dockerfiles/fedora-cris-cross.docker
index b168ada615..09e7e449f9 100644
--- a/tests/docker/dockerfiles/fedora-cris-cross.docker
+++ b/tests/docker/dockerfiles/fedora-cris-cross.docker
@@ -2,7 +2,7 @@
 # Cross compiler for cris system tests
 #
 
-FROM fedora:latest
+FROM fedora:30
 ENV PACKAGES gcc-cris-linux-gnu
 RUN dnf install -y $PACKAGES
 RUN rpm -q $PACKAGES | sort > /packages.txt
diff --git a/tests/docker/dockerfiles/fedora-i386-cross.docker b/tests/docker/dockerfiles/fedora-i386-cross.docker
index eb8108d118..9106cf9ebe 100644
--- a/tests/docker/dockerfiles/fedora-i386-cross.docker
+++ b/tests/docker/dockerfiles/fedora-i386-cross.docker
@@ -1,4 +1,4 @@
-FROM fedora:29
+FROM fedora:30
 ENV PACKAGES \
     gcc \
     glib2-devel.i686 \
-- 
2.20.1