diff --git a/tests/luks/test-key-option-inspect-luks-on-lvm.sh b/tests/luks/test-key-option-inspect-luks-on-lvm.sh
index 932862b17..2b60c7975 100755
--- a/tests/luks/test-key-option-inspect-luks-on-lvm.sh
+++ b/tests/luks/test-key-option-inspect-luks-on-lvm.sh
@@ -119,3 +119,20 @@ eval "$fish_ref"
 
 # Repeat the test.
 check_filesystems
+
+# Exit the current guestfish background process.
+guestfish --remote -- exit
+GUESTFISH_PID=
+
+# Test the --key all:... selector.
+keys_by_mapper_lvname=(
+  --key all:key:FEDORA-Root
+  --key all:key:FEDORA-LV1
+  --key all:key:FEDORA-LV2
+  --key all:key:FEDORA-LV3
+)
+fish_ref=$("${guestfish[@]}" "${keys_by_mapper_lvname[@]}")
+eval "$fish_ref"
+
+# Repeat the test.
+check_filesystems