diff --git a/.github/workflows/tests.yaml b/.github/workflows/tests.yaml
index a3b37ce..e277843 100644
--- a/.github/workflows/tests.yaml
+++ b/.github/workflows/tests.yaml
@@ -58,6 +58,10 @@ jobs:
                           CYLC_VERSION=8 rose version && \
                           fcm version && \
                           svn --version && \
-                          gfortran --version | grep 4.8.5 || fcm test-battery t/fcm-make && \
-                          fcm test-battery t/fcm-conflicts && \
+                          fcm test-battery t/fcm-make && \
                           which at"
+
+      - name: Test fcm conflicts
+        run: |
+          export VAGRANT_VAGRANTFILE=Vagrantfile.${{ matrix.os }}
+          vagrant ssh -c "fcm test-battery t/fcm-conflicts"
diff --git a/install.sh b/install.sh
index ed6f109..3fdad55 100755
--- a/install.sh
+++ b/install.sh
@@ -20,6 +20,8 @@ if [[ $collections =~ desktop ]]; then
 fi
 
 if [[ $dist == redhat && $release == centos* ]]; then
+  # Stream 8 now EOL
+  sed -i -e "s|mirrorlist=|#mirrorlist=|g" -e "s|#baseurl=http://mirror.centos.org|baseurl=http://vault.centos.org|g" /etc/yum.repos.d/CentOS-*
   # Add the EPEL repository
   yum install -y epel-release || error
 fi