diff --git a/test/shell/profiles-thin.sh b/test/shell/profiles-thin.sh
index 704ef2d11..3519985f0 100644
--- a/test/shell/profiles-thin.sh
+++ b/test/shell/profiles-thin.sh
@@ -34,7 +34,7 @@ vgcreate $vg "$dev1"
 lvcreate -L8m -T $vg/pool_generic
 check lv_field $vg/pool_generic profile ""
 check lv_field $vg/pool_generic chunk_size 64.00k
-check lv_field $vg/pool_generic zero 1
+check lv_field $vg/pool_generic zero "zero"
 
 # If "thin-performance" profile is used, the "performance"
 # policy is used to calculate chunk size which is 512KiB
@@ -44,7 +44,7 @@ check lv_field $vg/pool_generic zero 1
 lvcreate --profile thin-performance -L8m -T $vg/pool_performance
 check lv_field $vg/pool_performance profile "thin-performance"
 check lv_field $vg/pool_performance chunk_size 1.00m
-check lv_field $vg/pool_performance zero 0
+check lv_field $vg/pool_performance zero ""
 
 vgremove -ff $vg
 
@@ -56,4 +56,4 @@ lvcreate -L8m -T $vg/pool_performance_inherited
 check vg_field $vg profile "thin-performance"
 check lv_field $vg/pool_performance_inherited profile ""
 check lv_field $vg/pool_performance_inherited chunk_size 1.00m
-check lv_field $vg/pool_performance_inherited zero 0
+check lv_field $vg/pool_performance_inherited zero ""
diff --git a/test/shell/thin-defaults.sh b/test/shell/thin-defaults.sh
index 4f873cc18..3a681a1f1 100644
--- a/test/shell/thin-defaults.sh
+++ b/test/shell/thin-defaults.sh
@@ -30,6 +30,6 @@ lvcreate -T -L8M $vg/pool1
 
 check lv_field $vg/pool1 chunksize "128.00k"
 check lv_field $vg/pool1 discards "ignore"
-check lv_field $vg/pool1 zero 0
+check lv_field $vg/pool1 zero ""
 
 vgremove -f $vg