diff --git a/test/nvmf/target/filesystem.sh b/test/nvmf/target/filesystem.sh
index cd1523794..f4fbdec12 100755
--- a/test/nvmf/target/filesystem.sh
+++ b/test/nvmf/target/filesystem.sh
@@ -9,7 +9,7 @@ source $rootdir/test/setup/common.sh
 source $rootdir/test/common/autotest_common.sh
 source $rootdir/test/nvmf/common.sh
 
-MALLOC_BDEV_SIZE=128
+MALLOC_BDEV_SIZE=512
 MALLOC_BLOCK_SIZE=512
 
 nvmftestinit