diff --git a/tests/generic/015 b/tests/generic/015
index 10423a29..f6804897 100755
--- a/tests/generic/015
+++ b/tests/generic/015
@@ -31,7 +31,7 @@ _require_no_large_scratch_dev
 
 # btrfs needs at least 256MB (with upward round off) to create a non-mixed mode
 # fs. Ref: btrfs-progs: btrfs_min_dev_size()
-_scratch_mkfs_sized $((256 * 1024 * 1024)) >> $seqres.full 2>&1 \
+_scratch_mkfs_sized $((512 * 1024 * 1024)) >> $seqres.full 2>&1 \
     || _fail "mkfs failed"
 _scratch_mount
 out=$SCRATCH_MNT/fillup.$$
diff --git a/tests/generic/027 b/tests/generic/027
index 47f1981d..ad8175c1 100755
--- a/tests/generic/027
+++ b/tests/generic/027
@@ -35,7 +35,7 @@ _require_scratch
 
 echo "Silence is golden"
 
-_scratch_mkfs_sized $((256 * 1024 * 1024)) >>$seqres.full 2>&1
+_scratch_mkfs_sized $((512 * 1024 * 1024)) >>$seqres.full 2>&1
 _scratch_mount
 
 echo "Reserve 2M space" >>$seqres.full
diff --git a/tests/generic/077 b/tests/generic/077
index 94d89fae..639564ed 100755
--- a/tests/generic/077
+++ b/tests/generic/077
@@ -49,7 +49,7 @@ echo "*** create filesystem"
 _scratch_unmount >/dev/null 2>&1
 echo "*** MKFS ***"                         >>$seqres.full
 echo ""                                     >>$seqres.full
-fs_size=$((256 * 1024 * 1024))
+fs_size=$((512 * 1024 * 1024))
 _scratch_mkfs_sized $fs_size >> $seqres.full 2>&1 || _fail "mkfs failed"
 _scratch_mount
 mkdir $SCRATCH_MNT/subdir
diff --git a/tests/generic/081 b/tests/generic/081
index 22ac94de..8b481cb5 100755
--- a/tests/generic/081
+++ b/tests/generic/081
@@ -62,9 +62,9 @@ snapname=snap_$seq
 mnt=$TEST_DIR/mnt_$seq
 mkdir -p $mnt
 
-# make sure there's enough disk space for 256M lv, test for 300M here in case
+# make sure there's enough disk space for 256M lv, test for 512M here in case
 # lvm uses some space for metadata
-_scratch_mkfs_sized $((300 * 1024 * 1024)) >>$seqres.full 2>&1
+_scratch_mkfs_sized $((512 * 1024 * 1024)) >>$seqres.full 2>&1
 $LVM_PROG vgcreate -f $vgname $SCRATCH_DEV >>$seqres.full 2>&1
 # We use yes pipe instead of 'lvcreate --yes' because old version of lvm
 # (like 2.02.95 in RHEL6) don't support --yes option
diff --git a/tests/generic/083 b/tests/generic/083
index 2a5af3cc..4c79538c 100755
--- a/tests/generic/083
+++ b/tests/generic/083
@@ -62,7 +62,7 @@ workout()
 
 echo "*** test out-of-space handling for random write operations"
 
-filesize=`expr 256 \* 1024 \* 1024`
+filesize=`expr 512 \* 1024 \* 1024`
 agcount=6
 numprocs=15
 numops=1500
diff --git a/tests/generic/085 b/tests/generic/085
index 786d8e6f..006fcb5d 100755
--- a/tests/generic/085
+++ b/tests/generic/085
@@ -50,7 +50,7 @@ setup_dmdev()
 
 echo "Silence is golden"
 
-size=$((256 * 1024 * 1024))
+size=$((512 * 1024 * 1024))
 size_in_sector=$((size / 512))
 _scratch_mkfs_sized $size >>$seqres.full 2>&1
 
diff --git a/tests/generic/204 b/tests/generic/204
index a33a090f..3589b084 100755
--- a/tests/generic/204
+++ b/tests/generic/204
@@ -30,7 +30,7 @@ _require_scratch
 # time solves this problem.
 [ $FSTYP = "xfs" ] && MKFS_OPTIONS="$MKFS_OPTIONS -l size=16m -i maxpct=50"
 
-SIZE=`expr 115 \* 1024 \* 1024`
+SIZE=`expr 512 \* 1024 \* 1024`
 _scratch_mkfs_sized $SIZE 2> /dev/null > $tmp.mkfs.raw
 cat $tmp.mkfs.raw | _filter_mkfs 2> $tmp.mkfs > /dev/null
 _scratch_mount
diff --git a/tests/generic/226 b/tests/generic/226
index 34434730..d814b365 100755
--- a/tests/generic/226
+++ b/tests/generic/226
@@ -19,7 +19,7 @@ _require_odirect
 
 _scratch_unmount 2>/dev/null
 echo "--> mkfs 256m filesystem"
-_scratch_mkfs_sized `expr 256 \* 1024 \* 1024` >> $seqres.full 2>&1
+_scratch_mkfs_sized `expr 512 \* 1024 \* 1024` >> $seqres.full 2>&1
 _scratch_mount
 
 loops=16
diff --git a/tests/generic/250 b/tests/generic/250
index 97e9522f..bd1c6ffd 100755
--- a/tests/generic/250
+++ b/tests/generic/250
@@ -32,7 +32,7 @@ _require_odirect
 # bitmap consuming all the free space in our small data device.
 unset SCRATCH_RTDEV
 
-fssize=$((196 * 1048576))
+fssize=$((512 * 1048576))
 echo "Format and mount"
 $XFS_IO_PROG -d -c "pwrite -S 0x69 -b 1048576 0 $fssize" $SCRATCH_DEV >> $seqres.full
 _scratch_mkfs_sized $fssize > $seqres.full 2>&1
diff --git a/tests/generic/252 b/tests/generic/252
index 8c5adb53..93ab5242 100755
--- a/tests/generic/252
+++ b/tests/generic/252
@@ -33,7 +33,7 @@ AIO_TEST="$here/src/aio-dio-regress/aiocp"
 # bitmap consuming all the free space in our small data device.
 unset SCRATCH_RTDEV
 
-fssize=$((196 * 1048576))
+fssize=$((512 * 1048576))
 echo "Format and mount"
 $XFS_IO_PROG -d -c "pwrite -S 0x69 -b 1048576 0 $fssize" $SCRATCH_DEV >> $seqres.full
 _scratch_mkfs_sized $fssize > $seqres.full 2>&1
diff --git a/tests/generic/371 b/tests/generic/371
index a2fdaf7b..538df647 100755
--- a/tests/generic/371
+++ b/tests/generic/371
@@ -20,7 +20,7 @@ _require_scratch
 _require_xfs_io_command "falloc"
 test "$FSTYP" = "xfs" && _require_xfs_io_command "extsize"
 
-_scratch_mkfs_sized $((256 * 1024 * 1024)) >> $seqres.full 2>&1
+_scratch_mkfs_sized $((512 * 1024 * 1024)) >> $seqres.full 2>&1
 _scratch_mount
 
 # Disable speculative post-EOF preallocation on XFS, which can grow fast enough
diff --git a/tests/generic/387 b/tests/generic/387
index 25ca86bb..0546b7de 100755
--- a/tests/generic/387
+++ b/tests/generic/387
@@ -19,7 +19,7 @@ _supported_fs generic
 _require_scratch_reflink
 
 #btrfs needs 256mb to create default blockgroup fs
-_scratch_mkfs_sized $((256 * 1024 * 1024)) >> $seqres.full 2>&1
+_scratch_mkfs_sized $((512 * 1024 * 1024)) >> $seqres.full 2>&1
 _scratch_mount
 
 testfile=$SCRATCH_MNT/testfile
diff --git a/tests/generic/416 b/tests/generic/416
index deb05f07..24fdb737 100755
--- a/tests/generic/416
+++ b/tests/generic/416
@@ -21,7 +21,7 @@ _begin_fstest auto enospc
 _supported_fs generic
 _require_scratch
 
-fs_size=$((128 * 1024 * 1024))
+fs_size=$((512 * 1024 * 1024))
 page_size=$(get_page_size)
 
 # We will never reach this number though
diff --git a/tests/generic/427 b/tests/generic/427
index 26385d36..4f44c2ea 100755
--- a/tests/generic/427
+++ b/tests/generic/427
@@ -27,7 +27,7 @@ _require_aiodio aio-dio-eof-race
 _require_no_compress
 
 # limit the filesystem size, to save the time of filling filesystem
-_scratch_mkfs_sized $((256 * 1024 * 1024)) >>$seqres.full 2>&1
+_scratch_mkfs_sized $((512 * 1024 * 1024)) >>$seqres.full 2>&1
 _scratch_mount
 
 # try to write more bytes than filesystem size to fill the filesystem,
diff --git a/tests/generic/449 b/tests/generic/449
index 2b77a6a4..aebb5620 100755
--- a/tests/generic/449
+++ b/tests/generic/449
@@ -24,7 +24,7 @@ _require_test
 _require_acls
 _require_attrs trusted
 
-_scratch_mkfs_sized $((256 * 1024 * 1024)) >> $seqres.full 2>&1
+_scratch_mkfs_sized $((512 * 1024 * 1024)) >> $seqres.full 2>&1
 _scratch_mount || _fail "mount failed"
 
 # This is a test of xattr behavior when we run out of disk space for xattrs,
diff --git a/tests/generic/511 b/tests/generic/511
index 058d8401..8b1209d3 100755
--- a/tests/generic/511
+++ b/tests/generic/511
@@ -19,7 +19,7 @@ _require_scratch
 _require_xfs_io_command "falloc" "-k"
 _require_xfs_io_command "fzero"
 
-_scratch_mkfs_sized $((1024 * 1024 * 256)) >>$seqres.full 2>&1
+_scratch_mkfs_sized $((1024 * 1024 * 512)) >>$seqres.full 2>&1
 _scratch_mount
 
 $XFS_IO_PROG -fc "pwrite 0 256m" -c fsync $SCRATCH_MNT/file >>$seqres.full 2>&1
diff --git a/tests/generic/520 b/tests/generic/520
index ad6764c7..2a96dce1 100755
--- a/tests/generic/520
+++ b/tests/generic/520
@@ -24,8 +24,8 @@ _cleanup()
 . ./common/filter
 . ./common/dmflakey
 
-# 256MB in byte
-fssize=$((2**20 * 256))
+# 512MB in byte
+fssize=$((2**20 * 512))
 
 # real QA test starts here
 _supported_fs generic
diff --git a/tests/generic/536 b/tests/generic/536
index 986ea1ee..aac05587 100755
--- a/tests/generic/536
+++ b/tests/generic/536
@@ -21,7 +21,7 @@ _require_scratch
 _require_scratch_shutdown
 
 # create a small fs and initialize free blocks with a unique pattern
-_scratch_mkfs_sized $((1024 * 1024 * 100)) >> $seqres.full 2>&1
+_scratch_mkfs_sized $((1024 * 1024 * 512)) >> $seqres.full 2>&1
 _scratch_mount
 $XFS_IO_PROG -f -c "pwrite -S 0xab 0 100m" -c fsync $SCRATCH_MNT/spc \
 	>> $seqres.full 2>&1
diff --git a/tests/generic/619 b/tests/generic/619
index 6e42d677..1e883394 100755
--- a/tests/generic/619
+++ b/tests/generic/619
@@ -26,7 +26,7 @@
 . ./common/preamble
 _begin_fstest auto rw enospc
 
-FS_SIZE=$((240*1024*1024)) # 240MB
+FS_SIZE=$((512*1024*1024)) # 512MB
 DEBUG=1 # set to 0 to disable debug statements in shell and c-prog
 FACT=0.7
 
diff --git a/tests/generic/626 b/tests/generic/626
index 7e577798..a0411f01 100755
--- a/tests/generic/626
+++ b/tests/generic/626
@@ -22,7 +22,7 @@ _supported_fs generic
 _require_scratch
 _require_renameat2 whiteout
 
-_scratch_mkfs_sized $((256 * 1024 * 1024)) >> $seqres.full 2>&1
+_scratch_mkfs_sized $((512 * 1024 * 1024)) >> $seqres.full 2>&1
 _scratch_mount
 
 # Create lots of files, to help to trigger the bug easily
diff --git a/tests/xfs/015 b/tests/xfs/015
index 2bb7b8d5..1f487cae 100755
--- a/tests/xfs/015
+++ b/tests/xfs/015
@@ -43,7 +43,7 @@ _scratch_mount
 _require_fs_space $SCRATCH_MNT 131072
 _scratch_unmount
 
-_scratch_mkfs_sized $((32 * 1024 * 1024)) > $tmp.mkfs.raw || _fail "mkfs failed"
+_scratch_mkfs_sized $((512 * 1024 * 1024)) > $tmp.mkfs.raw || _fail "mkfs failed"
 cat $tmp.mkfs.raw | _filter_mkfs >$seqres.full 2>$tmp.mkfs
 # get original data blocks number and agcount
 . $tmp.mkfs
diff --git a/tests/xfs/107 b/tests/xfs/107
index 1ea9c492..e1f9b537 100755
--- a/tests/xfs/107
+++ b/tests/xfs/107
@@ -23,9 +23,9 @@ _require_scratch
 _require_xfs_io_command allocsp		# detect presence of ALLOCSP ioctl
 _require_test_program allocstale
 
-# Create a 256MB filesystem to avoid running into mkfs problems with too-small
+# Create a 512MB filesystem to avoid running into mkfs problems with too-small
 # filesystems.
-size_mb=256
+size_mb=512
 
 # Write a known pattern to the disk so that we can detect stale disk blocks
 # being mapped into the file.  In the test author's experience, the bug will
diff --git a/tests/xfs/118 b/tests/xfs/118
index 03755b28..6fc3cdaa 100755
--- a/tests/xfs/118
+++ b/tests/xfs/118
@@ -27,8 +27,8 @@ _require_scratch
 _require_command "$XFS_FSR_PROG" "xfs_fsr"
 _require_xfs_io_command "falloc"
 
-# 50M
-_scratch_mkfs_sized $((50 * 1024 * 1024)) >> $seqres.full 2>&1
+# 512M
+_scratch_mkfs_sized $((512 * 1024 * 1024)) >> $seqres.full 2>&1
 _scratch_mount
 
 echo "Silence is golden"
diff --git a/tests/xfs/227 b/tests/xfs/227
index cd927dc4..5f5f519e 100755
--- a/tests/xfs/227
+++ b/tests/xfs/227
@@ -122,7 +122,7 @@ create_target_attr_last()
 }
 
 # use a small filesystem so we can control freespace easily
-_scratch_mkfs_sized $((50 * 1024 * 1024)) >> $seqres.full 2>&1
+_scratch_mkfs_sized $((512 * 1024 * 1024)) >> $seqres.full 2>&1
 _scratch_mount
 fragment_freespace
 
diff --git a/tests/xfs/233 b/tests/xfs/233
index 2b2b8666..573b7a17 100755
--- a/tests/xfs/233
+++ b/tests/xfs/233
@@ -18,7 +18,7 @@ _require_xfs_scratch_rmapbt
 _require_no_large_scratch_dev
 
 echo "Format and mount"
-_scratch_mkfs_sized $((2 * 4096 * 4096)) > $seqres.full 2>&1
+_scratch_mkfs_sized $((32 * 4096 * 4096)) > $seqres.full 2>&1
 _scratch_mount >> $seqres.full 2>&1
 
 testdir=$SCRATCH_MNT/test-$seq
