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diff --git a/test/zerodamage.test b/test/zerodamage.test
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+# 2011 December 21
+#
+# The author disclaims copyright to this source code.  In place of
+# a legal notice, here is a blessing:
+#
+#    May you do good and not evil.
+#    May you find forgiveness for yourself and forgive others.
+#    May you share freely, never taking more than you give.
+#
+#***********************************************************************
+# 
+# This file implements tests of the SQLITE_IOCAP_POWERSAFE_OVERWRITE property
+# and the SQLITE_FCNTL_POWERSAFE_OVERWRITE file-control for manipulating it.
+#
+# The name of this file comes from the fact that we used to call the
+# POWERSAFE_OVERWRITE property ZERO_DAMAGE.
+#
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+set testprefix zerodamage
+
+ifcapable !vtab {
+  finish_test
+  return
+}
+
+# POWERSAFE_OVERWRITE defaults to true
+#
+do_test zerodamage-1.0 {
+  file_control_powersafe_overwrite db -1
+} {0 1}
+
+# Check the ability to turn zero-damage on and off.
+#
+do_test zerodamage-1.1 {
+  file_control_powersafe_overwrite db 0
+  file_control_powersafe_overwrite db -1
+} {0 0}
+do_test zerodamage-1.2 {
+  file_control_powersafe_overwrite db 1
+  file_control_powersafe_overwrite db -1
+} {0 1}
+
+# Run a transaction with zero-damage on, a small page size and a much larger
+# sectorsize.  Verify that the maximum journal size is small - that the
+# rollback journal is not being padded.
+#
+do_test zerodamage-2.0 {
+  db close
+  testvfs tv -default 1
+  tv sectorsize 8192
+  sqlite3 db file:test.db?psow=TRUE -uri 1
+  unset -nocomplain ::max_journal_size
+  set ::max_journal_size 0
+  proc xDeleteCallback {method file args} {
+    set sz [file size $file]
+    if {$sz>$::max_journal_size} {set ::max_journal_size $sz}
+  }
+  tv filter xDelete
+  tv script xDeleteCallback
+  load_static_extension db wholenumber
+  db eval {
+    PRAGMA page_size=1024;
+    PRAGMA journal_mode=DELETE;
+    PRAGMA cache_size=5;
+    CREATE VIRTUAL TABLE nums USING wholenumber;
+    CREATE TABLE t1(x, y);
+    INSERT INTO t1 SELECT value, randomblob(100) FROM nums
+                    WHERE value BETWEEN 1 AND 400;
+  }
+  set ::max_journal_size 0
+  db eval {
+    UPDATE t1 SET y=randomblob(50) WHERE x=123;
+  }
+  concat [file_control_powersafe_overwrite db -1] [set ::max_journal_size]
+} [list 0 1 [expr ([atomic_batch_write test.db]==0)*2576]]
+
+# Repeat the previous step with zero-damage turned off.  This time the
+# maximum rollback journal size should be much larger.
+#
+do_test zerodamage-2.1 {
+  set ::max_journal_size 0
+  db close
+  sqlite3 db file:test.db?psow=FALSE -uri 1
+  db eval {
+    UPDATE t1 SET y=randomblob(50) WHERE x=124;
+  }
+  concat [file_control_powersafe_overwrite db -1] [set ::max_journal_size]
+} [list 0 0 [expr ([atomic_batch_write test.db]==0)*24704]]
+
+if {[wal_is_capable]} {
+  # Run a WAL-mode transaction with POWERSAFE_OVERWRITE on to verify that the
+  # WAL file does not get too big.
+  #
+  do_test zerodamage-3.0 {
+    db eval {
+       PRAGMA journal_mode=WAL;
+    }
+    db close
+    sqlite3 db file:test.db?psow=TRUE -uri 1
+    db eval {
+       UPDATE t1 SET y=randomblob(50) WHERE x=124;
+    }
+    file size test.db-wal
+  } {1080}
+
+  # Repeat the previous with POWERSAFE_OVERWRITE off.  Verify that the WAL file
+  # is padded.
+  #
+  do_test zerodamage-3.1 {
+    db close
+    sqlite3 db file:test.db?psow=FALSE -uri 1
+    db eval {
+       PRAGMA synchronous=FULL;
+       UPDATE t1 SET y=randomblob(50) WHERE x=124;
+    }
+    file size test.db-wal
+  } {16800}
+}
+
+finish_test