diff --git a/snapshots/devmapper/pool_device_test.go b/snapshots/devmapper/pool_device_test.go
index b54d21470..e570230d0 100644
--- a/snapshots/devmapper/pool_device_test.go
+++ b/snapshots/devmapper/pool_device_test.go
@@ -40,8 +40,8 @@ const (
 	thinDevice1 = "thin-1"
 	thinDevice2 = "thin-2"
 	snapDevice1 = "snap-1"
-	device1Size = 100000
-	device2Size = 200000
+	device1Size = 1000000
+	device2Size = 2000000
 	testsPrefix = "devmapper-snapshotter-tests-"
 )