diff --git a/tests/generic/138 b/tests/generic/138
index 1037ed3e..d061ac34 100755
--- a/tests/generic/138
+++ b/tests/generic/138
@@ -35,37 +35,37 @@ echo "Create the original files"
 blksz=65536
 _pwrite_byte 0x61 0 $((blksz * 48 - 3)) $testdir/file1 >> $seqres.full
 _cp_reflink $testdir/file1 $testdir/file2 >> $seqres.full
-_pwrite_byte 0x61 0 $((blksz * 48 - 3)) $testdir/file3 >> $seqres.full
+_pwrite_byte 0x61 0 $((blksz * 48 - 3)) $testdir/file2.chk >> $seqres.full
 _test_cycle_mount
 
 echo "Compare files"
 md5sum $testdir/file1 | _filter_test_dir
 md5sum $testdir/file2 | _filter_test_dir
-md5sum $testdir/file3 | _filter_test_dir
+md5sum $testdir/file2.chk | _filter_test_dir
 
-cmp -s $testdir/file1 $testdir/file2 || echo "Files 1-2 do not match"
-cmp -s $testdir/file1 $testdir/file3 || echo "Files 1-3 do not match"
-cmp -s $testdir/file2 $testdir/file3 || echo "Files 2-3 do not match"
+cmp -s $testdir/file1 $testdir/file2 || echo "file1 and file2 do not match"
+cmp -s $testdir/file1 $testdir/file2.chk || echo "file1 and file2.chk do not match"
+cmp -s $testdir/file2 $testdir/file2.chk || echo "file1 and file2.chk do not match"
 
 echo "pagecache CoW the second file"
 _pwrite_byte 0x62 0 17 $testdir/file2 >> $seqres.full
-_pwrite_byte 0x62 0 17 $testdir/file3 >> $seqres.full
+_pwrite_byte 0x62 0 17 $testdir/file2.chk >> $seqres.full
 
 _pwrite_byte 0x62 $((blksz * 16 - 34)) 17 $testdir/file2 >> $seqres.full
-_pwrite_byte 0x62 $((blksz * 16 - 34)) 17 $testdir/file3 >> $seqres.full
+_pwrite_byte 0x62 $((blksz * 16 - 34)) 17 $testdir/file2.chk >> $seqres.full
 
 _pwrite_byte 0x62 $((blksz * 48 - 8)) 17 $testdir/file2 >> $seqres.full
-_pwrite_byte 0x62 $((blksz * 48 - 8)) 17 $testdir/file3 >> $seqres.full
+_pwrite_byte 0x62 $((blksz * 48 - 8)) 17 $testdir/file2.chk >> $seqres.full
 _test_cycle_mount
 
 echo "Compare files"
 md5sum $testdir/file1 | _filter_test_dir
 md5sum $testdir/file2 | _filter_test_dir
-md5sum $testdir/file3 | _filter_test_dir
+md5sum $testdir/file2.chk | _filter_test_dir
 
-cmp -s $testdir/file1 $testdir/file2 || echo "Files 1-2 do not match (intentional)"
-cmp -s $testdir/file1 $testdir/file3 || echo "Files 1-3 do not match (intentional)"
-cmp -s $testdir/file2 $testdir/file3 || echo "Files 2-3 do not match"
+cmp -s $testdir/file1 $testdir/file2 || echo "file1 and file2 do not match (intentional)"
+cmp -s $testdir/file1 $testdir/file2.chk || echo "file1 and file2.chk do not match (intentional)"
+cmp -s $testdir/file2 $testdir/file2.chk || echo "file2 and file2.chk do not match"
 
 echo "Compare the CoW'd section to the before file"
 _compare_range $testdir/file1 0 $testdir/file2 0 17 \
@@ -80,47 +80,47 @@ _compare_range  $testdir/file1 $((blksz * 48 - 8)) \
        || echo "End sections do not match (intentional)"
 
 echo "Compare the CoW'd section to the after file"
-_compare_range $testdir/file2 0 $testdir/file3 0 17 \
+_compare_range $testdir/file2 0 $testdir/file2.chk 0 17 \
        || echo "Start sections do not match"
 
 _compare_range  $testdir/file2 $((blksz * 16 - 34)) \
-		$testdir/file3 $((blksz * 16 - 34)) 17 \
+		$testdir/file2.chk $((blksz * 16 - 34)) 17 \
        || echo "Middle sections do not match"
 
 _compare_range  $testdir/file2 $((blksz * 48 - 8)) \
-		$testdir/file3 $((blksz * 48 - 8)) 17 \
+		$testdir/file2.chk $((blksz * 48 - 8)) 17 \
        || echo "End sections do not match"
 
 echo "Compare the not CoW'd sections"
 _compare_range $testdir/file1 18 $testdir/file2 18 17 \
-       || echo "Start sections of 1-2 do not match"
+       || echo "Start sections of file1 and file2 do not match"
 
-_compare_range $testdir/file2 18 $testdir/file3 18 17 \
-       || echo "Start sections of 2-3 do not match"
+_compare_range $testdir/file2 18 $testdir/file2.chk 18 17 \
+       || echo "Start sections of file2 and file2.chk do not match"
 
 _compare_range  $testdir/file1 $((blksz * 16 - 17)) \
 		$testdir/file2 $((blksz * 16 - 17)) 82 \
-       || echo "Middle sections of 1-2 do not match"
+       || echo "Middle sections of file1 and file2 do not match"
 
 _compare_range  $testdir/file2 $((blksz * 16 - 17)) \
-		$testdir/file3 $((blksz * 16 - 17)) 82 \
-       || echo "Middle sections of 2-3 do not match"
+		$testdir/file2.chk $((blksz * 16 - 17)) 82 \
+       || echo "Middle sections of file2 and file2.chk do not match"
 
 _compare_range  $testdir/file1 $((blksz * 48 - 108)) \
 		$testdir/file2 $((blksz * 48 - 108)) 100 \
-       || echo "End sections of 1-2 do not match"
+       || echo "End sections of file1 and file2 do not match"
 
 _compare_range  $testdir/file2 $((blksz * 48 - 108)) \
-		$testdir/file3 $((blksz * 48 - 108)) 100 \
-       || echo "End sections of 2-3 do not match"
+		$testdir/file2.chk $((blksz * 48 - 108)) 100 \
+       || echo "End sections of file2 and file2.chk do not match"
 
 _compare_range  $testdir/file1 $((blksz * 14)) \
 		$testdir/file2 $((blksz * 14)) $blksz \
-       || echo "Untouched sections of 1-2 do not match"
+       || echo "Untouched sections of file1 and file2 do not match"
 
 _compare_range  $testdir/file2 $((blksz * 14)) \
-		$testdir/file3 $((blksz * 14)) $blksz \
-       || echo "Untouched sections of 2-3 do not match"
+		$testdir/file2.chk $((blksz * 14)) $blksz \
+       || echo "Untouched sections of file2 and file2.chk do not match"
 
 # success, all done
 status=0
diff --git a/tests/generic/138.out b/tests/generic/138.out
index b0cafabe..60cd876e 100644
--- a/tests/generic/138.out
+++ b/tests/generic/138.out
@@ -3,14 +3,14 @@ Create the original files
 Compare files
 60ebe700450b6015c17fa15cacb9493b  TEST_DIR/test-138/file1
 60ebe700450b6015c17fa15cacb9493b  TEST_DIR/test-138/file2
-60ebe700450b6015c17fa15cacb9493b  TEST_DIR/test-138/file3
+60ebe700450b6015c17fa15cacb9493b  TEST_DIR/test-138/file2.chk
 pagecache CoW the second file
 Compare files
 60ebe700450b6015c17fa15cacb9493b  TEST_DIR/test-138/file1
 4a879c2f322121f6f4b8ebede1909a7c  TEST_DIR/test-138/file2
-4a879c2f322121f6f4b8ebede1909a7c  TEST_DIR/test-138/file3
-Files 1-2 do not match (intentional)
-Files 1-3 do not match (intentional)
+4a879c2f322121f6f4b8ebede1909a7c  TEST_DIR/test-138/file2.chk
+file1 and file2 do not match (intentional)
+file1 and file2.chk do not match (intentional)
 Compare the CoW'd section to the before file
 Start sections do not match (intentional)
 Middle sections do not match (intentional)
diff --git a/tests/generic/139 b/tests/generic/139
index 6422f66a..0bbc222c 100755
--- a/tests/generic/139
+++ b/tests/generic/139
@@ -36,37 +36,37 @@ echo "Create the original files"
 blksz=65536
 _pwrite_byte 0x61 0 $((blksz * 48 - 3)) $testdir/file1 >> $seqres.full
 _cp_reflink $testdir/file1 $testdir/file2 >> $seqres.full
-_pwrite_byte 0x61 0 $((blksz * 48 - 3)) $testdir/file3 >> $seqres.full
+_pwrite_byte 0x61 0 $((blksz * 48 - 3)) $testdir/file2.chk >> $seqres.full
 _test_cycle_mount
 
 echo "Compare files"
 md5sum $testdir/file1 | _filter_test_dir
 md5sum $testdir/file2 | _filter_test_dir
-md5sum $testdir/file3 | _filter_test_dir
+md5sum $testdir/file2.chk | _filter_test_dir
 
-cmp -s $testdir/file1 $testdir/file2 || echo "Files 1-2 should match"
-cmp -s $testdir/file1 $testdir/file3 || echo "Files 1-3 should match"
-cmp -s $testdir/file2 $testdir/file3 || echo "Files 2-3 should match"
+cmp -s $testdir/file1 $testdir/file2 || echo "file1 and file2 should match"
+cmp -s $testdir/file1 $testdir/file2.chk || echo "file1 and file2.chk should match"
+cmp -s $testdir/file2 $testdir/file2.chk || echo "file2 and file2.chk should match"
 
 echo "directio CoW the second file"
 _pwrite_byte 0x62 0 $blksz $testdir/file2 -d >> $seqres.full
-_pwrite_byte 0x62 0 $blksz $testdir/file3 -d >> $seqres.full
+_pwrite_byte 0x62 0 $blksz $testdir/file2.chk -d >> $seqres.full
 
 _pwrite_byte 0x62 $((blksz * 16 - 512)) 512 $testdir/file2 -d >> $seqres.full
-_pwrite_byte 0x62 $((blksz * 16 - 512)) 512 $testdir/file3 -d >> $seqres.full
+_pwrite_byte 0x62 $((blksz * 16 - 512)) 512 $testdir/file2.chk -d >> $seqres.full
 
 _pwrite_byte 0x62 $((blksz * 48)) $blksz $testdir/file2 -d >> $seqres.full
-_pwrite_byte 0x62 $((blksz * 48)) $blksz $testdir/file3 -d >> $seqres.full
+_pwrite_byte 0x62 $((blksz * 48)) $blksz $testdir/file2.chk -d >> $seqres.full
 _test_cycle_mount
 
 echo "Compare files"
 md5sum $testdir/file1 | _filter_test_dir
 md5sum $testdir/file2 | _filter_test_dir
-md5sum $testdir/file3 | _filter_test_dir
+md5sum $testdir/file2.chk | _filter_test_dir
 
-cmp -s $testdir/file1 $testdir/file2 || echo "Files 1-2 should not match (intentional)"
-cmp -s $testdir/file1 $testdir/file3 || echo "Files 1-3 should not match (intentional)"
-cmp -s $testdir/file2 $testdir/file3 || echo "Files 2-3 should match"
+cmp -s $testdir/file1 $testdir/file2 || echo "file1 and file2 should not match (intentional)"
+cmp -s $testdir/file1 $testdir/file2.chk || echo "file1 and file2.chk should not match (intentional)"
+cmp -s $testdir/file2 $testdir/file2.chk || echo "file2 and file2.chk should match"
 
 echo "Compare the CoW'd section to the before file"
 _compare_range $testdir/file1 0 $testdir/file2 0 $blksz \
@@ -81,46 +81,46 @@ _compare_range  $testdir/file1 $((blksz * 48 - 512)) \
        || echo "End sections do not match (intentional)"
 
 echo "Compare the CoW'd section to the after file"
-_compare_range $testdir/file2 0 $testdir/file3 0 $blksz \
+_compare_range $testdir/file2 0 $testdir/file2.chk 0 $blksz \
        || echo "Start sections do not match"
 
 _compare_range  $testdir/file2 $((blksz * 16 - 512)) \
-		$testdir/file3 $((blksz * 16 - 512)) 512 \
+		$testdir/file2.chk $((blksz * 16 - 512)) 512 \
        || echo "Middle sections do not match"
 
 _compare_range  $testdir/file2 $((blksz * 48 - 512)) \
-		$testdir/file3 $((blksz * 48 - 512)) $blksz \
+		$testdir/file2.chk $((blksz * 48 - 512)) $blksz \
        || echo "End sections do not match"
 
 echo "Compare the not CoW'd sections"
 _compare_range $testdir/file1 $blksz $testdir/file2 $blksz 512 \
-       || echo "Start sections of 1-2 do not match"
-_compare_range $testdir/file2 $blksz $testdir/file3 $blksz 512 \
-       || echo "Start sections of 2-3 do not match"
+       || echo "Start sections of file1 and file2 do not match"
+_compare_range $testdir/file2 $blksz $testdir/file2.chk $blksz 512 \
+       || echo "Start sections of file2 and file2.chk do not match"
 
 _compare_range  $testdir/file1 $((blksz * 16 - 1024)) \
 		$testdir/file2 $((blksz * 16 - 1024)) 512 \
-       || echo "Middle sections of 1-2 do not match"
+       || echo "Middle sections of file1 and file2 do not match"
 
 _compare_range  $testdir/file2 $((blksz * 16 - 1024)) \
-		$testdir/file3 $((blksz * 16 - 1024)) 512 \
-       || echo "Middle sections of 2-3 do not match"
+		$testdir/file2.chk $((blksz * 16 - 1024)) 512 \
+       || echo "Middle sections of file2 and file2.chk do not match"
 
 _compare_range  $testdir/file1 $((blksz * 48 - 1024)) \
 		$testdir/file2 $((blksz * 48 - 1024)) 512 \
-       || echo "End sections of 1-2 do not match"
+       || echo "End sections of file1 and file2 do not match"
 
 _compare_range  $testdir/file2 $((blksz * 48 - 1024)) \
-		$testdir/file3 $((blksz * 48 - 1024)) 512 \
-       || echo "End sections of 2-3 do not match"
+		$testdir/file2.chk $((blksz * 48 - 1024)) 512 \
+       || echo "End sections of file2 and file2.chk do not match"
 
 _compare_range  $testdir/file1 $((blksz * 16)) \
 		$testdir/file2 $((blksz * 16)) 512 \
-       || echo "Untouched sections of 1-2 do not match"
+       || echo "Untouched sections of file1 and file2 do not match"
 
 _compare_range  $testdir/file2 $((blksz * 16)) \
-		$testdir/file3 $((blksz * 16)) 512 \
-       || echo "Untouched sections of 2-3 do not match"
+		$testdir/file2.chk $((blksz * 16)) 512 \
+       || echo "Untouched sections of file2 and file2.chk do not match"
 
 # success, all done
 status=0
diff --git a/tests/generic/139.out b/tests/generic/139.out
index 28d04f5f..56d6c9f9 100644
--- a/tests/generic/139.out
+++ b/tests/generic/139.out
@@ -3,14 +3,14 @@ Create the original files
 Compare files
 60ebe700450b6015c17fa15cacb9493b  TEST_DIR/test-139/file1
 60ebe700450b6015c17fa15cacb9493b  TEST_DIR/test-139/file2
-60ebe700450b6015c17fa15cacb9493b  TEST_DIR/test-139/file3
+60ebe700450b6015c17fa15cacb9493b  TEST_DIR/test-139/file2.chk
 directio CoW the second file
 Compare files
 60ebe700450b6015c17fa15cacb9493b  TEST_DIR/test-139/file1
 ff5626fb6c71b242d6b1a43de25c9a85  TEST_DIR/test-139/file2
-ff5626fb6c71b242d6b1a43de25c9a85  TEST_DIR/test-139/file3
-Files 1-2 should not match (intentional)
-Files 1-3 should not match (intentional)
+ff5626fb6c71b242d6b1a43de25c9a85  TEST_DIR/test-139/file2.chk
+file1 and file2 should not match (intentional)
+file1 and file2.chk should not match (intentional)
 Compare the CoW'd section to the before file
 Start sections do not match (intentional)
 Middle sections do not match (intentional)
diff --git a/tests/generic/140 b/tests/generic/140
index 6cba5791..52cf07dc 100755
--- a/tests/generic/140
+++ b/tests/generic/140
@@ -35,37 +35,37 @@ echo "Create the original files"
 blksz=65536
 _pwrite_byte 0x61 0 $((blksz * 48 - 3)) $testdir/file1 >> $seqres.full
 _cp_reflink $testdir/file1 $testdir/file2 >> $seqres.full
-_pwrite_byte 0x61 0 $((blksz * 48 - 3)) $testdir/file3 >> $seqres.full
+_pwrite_byte 0x61 0 $((blksz * 48 - 3)) $testdir/file2.chk >> $seqres.full
 _test_cycle_mount
 
 echo "Compare files"
 md5sum $testdir/file1 | _filter_test_dir
 md5sum $testdir/file2 | _filter_test_dir
-md5sum $testdir/file3 | _filter_test_dir
+md5sum $testdir/file2.chk | _filter_test_dir
 
-cmp -s $testdir/file1 $testdir/file2 || echo "Files 1-2 do not match"
-cmp -s $testdir/file1 $testdir/file3 || echo "Files 1-3 do not match"
-cmp -s $testdir/file2 $testdir/file3 || echo "Files 2-3 do not match"
+cmp -s $testdir/file1 $testdir/file2 || echo "file1 and file2 do not match"
+cmp -s $testdir/file1 $testdir/file2.chk || echo "file1 and file2.chk do not match"
+cmp -s $testdir/file2 $testdir/file2.chk || echo "file2 and file2.chk do not match"
 
 echo "mmap CoW the second file"
 _mwrite_byte 0x62 0 17 $((blksz * 48 - 3)) $testdir/file2 >> $seqres.full
-_mwrite_byte 0x62 0 17 $((blksz * 48 - 3)) $testdir/file3 >> $seqres.full
+_mwrite_byte 0x62 0 17 $((blksz * 48 - 3)) $testdir/file2.chk >> $seqres.full
 
 _mwrite_byte 0x62 $((blksz * 16 - 34)) 17 $((blksz * 48 - 3)) $testdir/file2 >> $seqres.full
-_mwrite_byte 0x62 $((blksz * 16 - 34)) 17 $((blksz * 48 - 3)) $testdir/file3 >> $seqres.full
+_mwrite_byte 0x62 $((blksz * 16 - 34)) 17 $((blksz * 48 - 3)) $testdir/file2.chk >> $seqres.full
 
 _mwrite_byte 0x62 $((blksz * 48 - 20)) 17 $((blksz * 48 - 3)) $testdir/file2 >> $seqres.full
-_mwrite_byte 0x62 $((blksz * 48 - 20)) 17 $((blksz * 48 - 3)) $testdir/file3 >> $seqres.full
+_mwrite_byte 0x62 $((blksz * 48 - 20)) 17 $((blksz * 48 - 3)) $testdir/file2.chk >> $seqres.full
 _test_cycle_mount
 
 echo "Compare files"
 md5sum $testdir/file1 | _filter_test_dir
 md5sum $testdir/file2 | _filter_test_dir
-md5sum $testdir/file3 | _filter_test_dir
+md5sum $testdir/file2.chk | _filter_test_dir
 
-cmp -s $testdir/file1 $testdir/file2 || echo "Files 1-2 do not match (intentional)"
-cmp -s $testdir/file1 $testdir/file3 || echo "Files 1-3 do not match (intentional)"
-cmp -s $testdir/file2 $testdir/file3 || echo "Files 2-3 do not match"
+cmp -s $testdir/file1 $testdir/file2 || echo "file1 and file2 do not match (intentional)"
+cmp -s $testdir/file1 $testdir/file2.chk || echo "file1 and file2.chk do not match (intentional)"
+cmp -s $testdir/file2 $testdir/file2.chk || echo "file2 and file2.chk do not match"
 
 echo "Compare the CoW'd section to the before file"
 _compare_range $testdir/file1 0 $testdir/file2 0 17 \
@@ -80,47 +80,47 @@ _compare_range  $testdir/file1 $((blksz * 48 - 20)) \
        || echo "End sections do not match (intentional)"
 
 echo "Compare the CoW'd section to the after file"
-_compare_range $testdir/file2 0 $testdir/file3 0 17 \
+_compare_range $testdir/file2 0 $testdir/file2.chk 0 17 \
        || echo "Start sections do not match"
 
 _compare_range  $testdir/file2 $((blksz * 16 - 34)) \
-		$testdir/file3 $((blksz * 16 - 34)) 17 \
+		$testdir/file2.chk $((blksz * 16 - 34)) 17 \
        || echo "Middle sections do not match"
 
 _compare_range  $testdir/file2 $((blksz * 48 - 20)) \
-		$testdir/file3 $((blksz * 48 - 20)) 17 \
+		$testdir/file2.chk $((blksz * 48 - 20)) 17 \
        || echo "End sections do not match"
 
 echo "Compare the not CoW'd sections"
 _compare_range $testdir/file1 18 $testdir/file2 18 17 \
-       || echo "Start sections of 1-2 do not match"
+       || echo "Start sections of file1 and file2 do not match"
 
-_compare_range $testdir/file2 18 $testdir/file3 18 17 \
-       || echo "Start sections of 2-3 do not match"
+_compare_range $testdir/file2 18 $testdir/file2.chk 18 17 \
+       || echo "Start sections of file2 and file2.chk do not match"
 
 _compare_range  $testdir/file1 $((blksz * 16 - 17)) \
 		$testdir/file2 $((blksz * 16 - 17)) 82 \
-       || echo "Middle sections of 1-2 do not match"
+       || echo "Middle sections of file1 and file2 do not match"
 
 _compare_range  $testdir/file2 $((blksz * 16 - 17)) \
-		$testdir/file3 $((blksz * 16 - 17)) 82 \
-       || echo "Middle sections of 2-3 do not match"
+		$testdir/file2.chk $((blksz * 16 - 17)) 82 \
+       || echo "Middle sections of file2 and file2.chk do not match"
 
 _compare_range  $testdir/file1 $((blksz * 48 - 120)) \
 		$testdir/file2 $((blksz * 48 - 120)) 100 \
-       || echo "End sections of 1-2 do not match"
+       || echo "End sections of file1 and file2 do not match"
 
 _compare_range  $testdir/file2 $((blksz * 48 - 120)) \
-		$testdir/file3 $((blksz * 48 - 120)) 100 \
-       || echo "End sections of 2-3 do not match"
+		$testdir/file2.chk $((blksz * 48 - 120)) 100 \
+       || echo "End sections of file2 and file2.chk do not match"
 
 _compare_range  $testdir/file1 $((blksz * 14)) \
 		$testdir/file2 $((blksz * 14)) $blksz \
-       || echo "Untouched sections of 1-2 do not match"
+       || echo "Untouched sections of file1 and file2 do not match"
 
 _compare_range  $testdir/file2 $((blksz * 14)) \
-		$testdir/file3 $((blksz * 14)) $blksz \
-       || echo "Untouched sections of 2-3 do not match"
+		$testdir/file2.chk $((blksz * 14)) $blksz \
+       || echo "Untouched sections of file2 and file2.chk do not match"
 
 # success, all done
 status=0
diff --git a/tests/generic/140.out b/tests/generic/140.out
index 51a5b854..89389001 100644
--- a/tests/generic/140.out
+++ b/tests/generic/140.out
@@ -3,14 +3,14 @@ Create the original files
 Compare files
 60ebe700450b6015c17fa15cacb9493b  TEST_DIR/test-140/file1
 60ebe700450b6015c17fa15cacb9493b  TEST_DIR/test-140/file2
-60ebe700450b6015c17fa15cacb9493b  TEST_DIR/test-140/file3
+60ebe700450b6015c17fa15cacb9493b  TEST_DIR/test-140/file2.chk
 mmap CoW the second file
 Compare files
 60ebe700450b6015c17fa15cacb9493b  TEST_DIR/test-140/file1
 795ecfd281dbda4916431376228e4187  TEST_DIR/test-140/file2
-795ecfd281dbda4916431376228e4187  TEST_DIR/test-140/file3
-Files 1-2 do not match (intentional)
-Files 1-3 do not match (intentional)
+795ecfd281dbda4916431376228e4187  TEST_DIR/test-140/file2.chk
+file1 and file2 do not match (intentional)
+file1 and file2.chk do not match (intentional)
 Compare the CoW'd section to the before file
 Start sections do not match (intentional)
 Middle sections do not match (intentional)
