diff --git a/test/vm.install b/test/vm.install
index c6c01196..91bd188c 100644
--- a/test/vm.install
+++ b/test/vm.install
@@ -5,8 +5,9 @@ SRPM="$1"
 # Grow root partition to make room for images. This only works on Fedora right now.
 echo ", +" | sfdisk -N 2 -f /dev/vda
 partprobe
-pvresize /dev/vda2
-lvresize fedora/root -l+100%FREE -r
+pvs --noheadings -opv_name | xargs pvresize
+rootlv=$(findmnt --noheadings -oSOURCE /)
+lvresize $rootlv -l+100%FREE -r
 
 rm -rf build-results
 su builder -c "/usr/bin/mock --no-clean --resultdir build-results --rebuild $SRPM"