diff --git a/tests/testsuite.at b/tests/testsuite.at
index cc7c363..f63060a 100644
--- a/tests/testsuite.at
+++ b/tests/testsuite.at
@@ -125,8 +125,9 @@ dnl  Check for a BookmarkFS filesystem.
 dnl
 m4_define([ATX_CHECK_FS], [
     ATX_CHECK_SIMPLE([
-        ATX_FEAT_PREREQ([bookmarkfs-mount], [backend-$1])
+        ATX_FEAT_PREREQ([bookmarkfs-mount])
         $5
+        ATX_FEAT_IF([backend-$1], , [exit])
         "$buildsrcdir/mount.bookmarkfs" -F  \
                 -o "backend=ATX_OPT_MODULE([backend_$1])"  \
                 -o "fsname=check-$1,no_sandbox,$2"  \
@@ -153,8 +154,9 @@ dnl  created with mkfs.bookmarkfs.
 dnl
 m4_define([ATX_CHECK_FS_NEW], [
     ATX_CHECK_FS([$1], [rw,$2], [bookmarks-$1], [$3], [
-        ATX_FEAT_PREREQ([bookmarkfs-mkfs], [backend-$1-write])
+        ATX_FEAT_PREREQ([bookmarkfs-mkfs])
         $4
+        ATX_FEAT_IF([backend-$1-write], , [exit])
         "$buildsrcdir/mkfs.bookmarkfs"  \
                 -o "backend=ATX_OPT_MODULE([backend_$1]),force"  \
                 "bookmarks-$1" || exit 1