diff --git a/tests/generic/157 b/tests/generic/157
index a43fb0d..f68ff52 100755
--- a/tests/generic/157
+++ b/tests/generic/157
@@ -75,10 +75,18 @@ mkdir "$TESTDIR1/dir1"
 seq 1 $((2 * BLKSZ / 250)) | while read f; do
 	touch "$TESTDIR1/dir1/$f"
 done
-mknod "$TESTDIR1/dev1" b 8 0
+mknod "$TESTDIR1/dev1" c 1 3
 mkfifo "$TESTDIR1/fifo1"
 sync
 
+_filter_enotty() {
+	sed -e 's/Inappropriate ioctl for device/Invalid argument/g'
+}
+
+_filter_einval() {
+	sed -e 's/Invalid argument/Bad file descriptor/g'
+}
+
 echo "Try cross-device reflink"
 _reflink_range "$TESTDIR1/file1" 0 "$TESTDIR2/file1" 0 $BLKSZ
 
@@ -98,16 +106,16 @@ echo "Try to reflink a device"
 _reflink_range "$TESTDIR1/dev1" 0 "$TESTDIR1/file2" 0 $BLKSZ
 
 echo "Try to reflink to a dir"
-_reflink_range "$TESTDIR1/file1" 0 "$TESTDIR1/dir1" 0 $BLKSZ
+_reflink_range "$TESTDIR1/file1" 0 "$TESTDIR1/dir1" 0 $BLKSZ 2>&1 | _filter_test_dir
 
 echo "Try to reflink to a device"
-_reflink_range "$TESTDIR1/file1" 0 "$TESTDIR1/dev1" 0 $BLKSZ
+_reflink_range "$TESTDIR1/file1" 0 "$TESTDIR1/dev1" 0 $BLKSZ 2>&1 | _filter_enotty
 
 echo "Try to reflink to a fifo"
-_reflink_range "$TESTDIR1/file1" 0 "$TESTDIR1/fifo1" 0 $BLKSZ -n
+_reflink_range "$TESTDIR1/file1" 0 "$TESTDIR1/fifo1" 0 $BLKSZ -n 2>&1 | _filter_enotty
 
 echo "Try to reflink an append-only file"
-_reflink_range "$TESTDIR1/file1" 0 "$TESTDIR1/file3" 0 $BLKSZ -a
+_reflink_range "$TESTDIR1/file1" 0 "$TESTDIR1/file3" 0 $BLKSZ -a 2>&1 | _filter_einval
 
 echo "Reflink two files"
 _reflink_range "$TESTDIR1/file1" 0 "$TESTDIR1/file2" 0 $BLKSZ >> "$seqres.full"
diff --git a/tests/generic/157.out b/tests/generic/157.out
index 177e7f8..ac3c440 100644
--- a/tests/generic/157.out
+++ b/tests/generic/157.out
@@ -14,11 +14,11 @@ XFS_IOC_CLONE_RANGE: Is a directory
 Try to reflink a device
 XFS_IOC_CLONE_RANGE: Invalid argument
 Try to reflink to a dir
-/mnt/test-157/dir1: Is a directory
+TEST_DIR/test-157/dir1: Is a directory
 Try to reflink to a device
-XFS_IOC_CLONE_RANGE: Operation not supported
+XFS_IOC_CLONE_RANGE: Invalid argument
 Try to reflink to a fifo
-XFS_IOC_CLONE_RANGE: Operation not supported
+XFS_IOC_CLONE_RANGE: Invalid argument
 Try to reflink an append-only file
 XFS_IOC_CLONE_RANGE: Bad file descriptor
 Reflink two files
diff --git a/tests/generic/158 b/tests/generic/158
index a499b21..749b186 100755
--- a/tests/generic/158
+++ b/tests/generic/158
@@ -76,10 +76,18 @@ mkdir "$TESTDIR1/dir1"
 seq 1 $((2 * BLKSZ / 250)) | while read f; do
 	touch "$TESTDIR1/dir1/$f"
 done
-mknod "$TESTDIR1/dev1" b 8 0
+mknod "$TESTDIR1/dev1" c 1 3
 mkfifo "$TESTDIR1/fifo1"
 sync
 
+_filter_enotty() {
+	sed -e 's/Inappropriate ioctl for device/Invalid argument/g'
+}
+
+_filter_eperm() {
+	sed -e 's/Permission denied/Invalid argument/g'
+}
+
 echo "Try cross-device dedupe"
 _dedupe_range "$TESTDIR1/file1" 0 "$TESTDIR2/file1" 0 $BLKSZ
 
@@ -96,16 +104,16 @@ echo "Try to dedupe a dir"
 _dedupe_range "$TESTDIR1/dir1" 0 "$TESTDIR1/file2" 0 $BLKSZ
 
 echo "Try to dedupe a device"
-_dedupe_range "$TESTDIR1/dev1" 0 "$TESTDIR1/file2" 0 $BLKSZ
+_dedupe_range "$TESTDIR1/dev1" 0 "$TESTDIR1/file2" 0 $BLKSZ 2>&1 | _filter_enotty
 
 echo "Try to dedupe to a dir"
-_dedupe_range "$TESTDIR1/file1" 0 "$TESTDIR1/dir1" 0 $BLKSZ
+_dedupe_range "$TESTDIR1/file1" 0 "$TESTDIR1/dir1" 0 $BLKSZ 2>&1 | _filter_test_dir
 
 echo "Try to dedupe to a device"
-_dedupe_range "$TESTDIR1/file1" 0 "$TESTDIR1/dev1" 0 $BLKSZ
+_dedupe_range "$TESTDIR1/file1" 0 "$TESTDIR1/dev1" 0 $BLKSZ 2>&1 | _filter_eperm
 
 echo "Try to dedupe to a fifo"
-_dedupe_range "$TESTDIR1/file1" 0 "$TESTDIR1/fifo1" 0 $BLKSZ -n
+_dedupe_range "$TESTDIR1/file1" 0 "$TESTDIR1/fifo1" 0 $BLKSZ -n 2>&1 | _filter_eperm
 
 echo "Try to dedupe an append-only file"
 _dedupe_range "$TESTDIR1/file1" 0 "$TESTDIR1/file3" 0 $BLKSZ -a >> "$seqres.full"
diff --git a/tests/generic/158.out b/tests/generic/158.out
index 36a3f1f..dff3692 100644
--- a/tests/generic/158.out
+++ b/tests/generic/158.out
@@ -12,13 +12,13 @@ dedupe: Invalid argument
 Try to dedupe a dir
 XFS_IOC_FILE_EXTENT_SAME: Is a directory
 Try to dedupe a device
-XFS_IOC_FILE_EXTENT_SAME: Permission denied
+XFS_IOC_FILE_EXTENT_SAME: Invalid argument
 Try to dedupe to a dir
-/mnt/test-158/dir1: Is a directory
+TEST_DIR/test-158/dir1: Is a directory
 Try to dedupe to a device
-dedupe: Permission denied
+dedupe: Invalid argument
 Try to dedupe to a fifo
-dedupe: Permission denied
+dedupe: Invalid argument
 Try to dedupe an append-only file
 Dedupe two files
 Check scratch fs
