diff --git a/include/sys/fs/zfs.h b/include/sys/fs/zfs.h
index 5d43750594cd..a6b704ec87a0 100644
--- a/include/sys/fs/zfs.h
+++ b/include/sys/fs/zfs.h
@@ -1225,7 +1225,7 @@ typedef struct ddt_histogram {
 #define	ZVOL_DEV_NAME		"zd"
 
 #define	ZVOL_PROP_NAME		"name"
-#define	ZVOL_DEFAULT_BLOCKSIZE	8192
+#define	ZVOL_DEFAULT_BLOCKSIZE	16384
 
 typedef enum {
 	VDEV_INITIALIZE_NONE,
diff --git a/man/man7/zfsprops.7 b/man/man7/zfsprops.7
index 3f3ddcebf320..fcf086f0c271 100644
--- a/man/man7/zfsprops.7
+++ b/man/man7/zfsprops.7
@@ -527,7 +527,7 @@ cannot be changed once the volume has been written, so it should be set at
 volume creation time.
 The default
 .Sy blocksize
-for volumes is 8 Kbytes.
+for volumes is 16 Kbytes.
 Any power of 2 from 512 bytes to 128 Kbytes is valid.
 .Pp
 This property can also be referred to by its shortened column name,
diff --git a/tests/zfs-tests/tests/functional/cli_root/zfs_create/zfs_create.cfg b/tests/zfs-tests/tests/functional/cli_root/zfs_create/zfs_create.cfg
index 9bf25327ef8d..785d5a001603 100644
--- a/tests/zfs-tests/tests/functional/cli_root/zfs_create/zfs_create.cfg
+++ b/tests/zfs-tests/tests/functional/cli_root/zfs_create/zfs_create.cfg
@@ -62,4 +62,4 @@ set -A size "8k" "8K" "35K" "1m" "1M" "1mb" "1mB" "1Mb" "1MB" "1g" "1G" \
 # explicitly check that its size has been rounded up to the nearest multiple
 # The volume with the exact size must exist in the "size" array above
 set -A explicit_size_check "35K"
-set -A expected_rounded_size "40960"
+set -A expected_rounded_size "49152"
diff --git a/tests/zfs-tests/tests/functional/nopwrite/nopwrite_volume.ksh b/tests/zfs-tests/tests/functional/nopwrite/nopwrite_volume.ksh
index a118b982240c..66ac29277ef0 100755
--- a/tests/zfs-tests/tests/functional/nopwrite/nopwrite_volume.ksh
+++ b/tests/zfs-tests/tests/functional/nopwrite/nopwrite_volume.ksh
@@ -45,14 +45,14 @@ log_assert "nopwrite works on volumes"
 
 log_must zfs set compress=on $origin
 log_must zfs set checksum=sha256 $origin
-dd if=/dev/urandom of=$vol bs=8192 count=4096 conv=notrunc >/dev/null \
+dd if=/dev/urandom of=$vol bs=16384 count=2048 conv=notrunc >/dev/null \
     2>&1 || log_fail "dd into $origin failed."
 zfs snapshot $origin@a || log_fail "zfs snap failed"
 log_must zfs clone $origin@a $clone
 log_must zfs set compress=on $clone
 log_must zfs set checksum=sha256 $clone
 block_device_wait
-dd if=$vol of=$volclone bs=8192 count=4096 conv=notrunc >/dev/null 2>&1 || \
+dd if=$vol of=$volclone bs=16384 count=2048 conv=notrunc >/dev/null 2>&1 || \
     log_fail "dd into $clone failed."
 log_must verify_nopwrite $origin $origin@a $clone
 
diff --git a/tests/zfs-tests/tests/functional/reservation/reservation.shlib b/tests/zfs-tests/tests/functional/reservation/reservation.shlib
index 49ee3b992dcc..47bd70f7cbcc 100644
--- a/tests/zfs-tests/tests/functional/reservation/reservation.shlib
+++ b/tests/zfs-tests/tests/functional/reservation/reservation.shlib
@@ -108,7 +108,7 @@ function create_multiple_fs # num_fs base_fs_name base_mnt_name
 
 #
 # This function compute the largest volume size which is multiple of volume
-# block size (default 8K) and not greater than the largest expected volsize.
+# block size (default 16K) and not greater than the largest expected volsize.
 #
 # $1 The largest expected volume size.
 # $2 The volume block size
@@ -116,7 +116,7 @@ function create_multiple_fs # num_fs base_fs_name base_mnt_name
 function floor_volsize #<largest_volsize> [volblksize]
 {
 	typeset largest_volsize=$1
-	typeset volblksize=${2:-8192}
+	typeset volblksize=${2:-16384}
 
 	if ((largest_volsize < volblksize)); then
 		log_fail "The largest_volsize must be greater than volblksize."
@@ -157,7 +157,7 @@ function volsize_to_reservation
 		typeset volblocksize=$(get_prop volblocksize $vol)
 	else
 		typeset ncopies=1
-		typeset volblocksize=8192
+		typeset volblocksize=16384
 	fi
 	typeset nblocks=$((volsize / volblocksize))