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diff --git a/test/attach4.test b/test/attach4.test
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+# 200 July 1
+#
+# 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 regression tests for SQLite library.  The
+# focus of this script is attaching many database files to a single
+# connection.
+#
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+
+set testprefix attach4
+
+ifcapable !attach {
+  finish_test
+  return
+}
+
+puts "Testing with SQLITE_MAX_ATTACHED=$SQLITE_MAX_ATTACHED"
+
+set files {main test.db}
+for {set ii 0} {$ii < $SQLITE_MAX_ATTACHED} {incr ii} {
+  lappend files aux$ii "test.db$ii"
+}
+
+do_test 1.1 {
+  sqlite3_limit db SQLITE_LIMIT_ATTACHED -1
+} $SQLITE_MAX_ATTACHED
+
+do_test 1.2.1 {
+  db close
+  foreach {name f} $files { forcedelete $f }
+  sqlite3 db test.db
+  
+  foreach {name f} $files {
+    if {$name == "main"} continue
+    execsql "ATTACH '$f' AS $name"
+  }
+
+  db eval {PRAGMA database_list} {
+    lappend L $name [file tail $file]
+  }
+  set L
+} $files
+
+do_catchsql_test 1.2.2 {
+  ATTACH 'x.db' AS next;
+} [list 1 "too many attached databases - max $SQLITE_MAX_ATTACHED"]
+
+do_test 1.3 {
+  execsql BEGIN;
+  foreach {name f} $files {
+    execsql "CREATE TABLE $name.tbl(x)"
+    execsql "INSERT INTO $name.tbl VALUES('$f')"
+  }
+  execsql COMMIT;
+} {}
+
+do_test 1.4 {
+  set L [list]
+  foreach {name f} $files {
+    lappend L $name [execsql "SELECT x FROM $name.tbl"]
+  }
+  set L
+} $files
+
+set L [list]
+set S ""
+foreach {name f} $files {
+  if {[permutation] == "journaltest"} {
+    set mode delete
+  } else {
+    set mode wal
+  }
+  ifcapable !wal { set mode delete }
+  lappend L $mode
+  append S "
+    PRAGMA $name.journal_mode = WAL;
+    UPDATE $name.tbl SET x = '$name';
+  "
+}
+do_execsql_test 1.5 $S $L
+
+do_test 1.6 {
+  set L [list]
+  foreach {name f} $files {
+    lappend L [execsql "SELECT x FROM $name.tbl"] $f
+  }
+  set L
+} $files
+
+do_test 1.7 {
+  execsql BEGIN;
+  foreach {name f} $files {
+    execsql "UPDATE $name.tbl SET x = '$f'"
+  }
+  execsql COMMIT;
+} {}
+
+do_test 1.8 {
+  set L [list]
+  foreach {name f} $files {
+    lappend L $name [execsql "SELECT x FROM $name.tbl"]
+  }
+  set L
+} $files
+
+db close
+foreach {name f} $files { forcedelete $f }
+
+#-------------------------------------------------------------------------
+reset_db
+do_execsql_test 2.0 {
+  ATTACH DATABASE '' AS aux;
+  CREATE TABLE IF NOT EXISTS aux.t1(a, b);
+  CREATE TEMPORARY TRIGGER tr1 DELETE ON t1 BEGIN 
+    DELETE FROM t1; 
+  END;
+  CREATE TABLE temp.t1(a, b);
+}
+
+do_execsql_test 2.1 {
+  DETACH DATABASE aux;
+}
+
+do_execsql_test 2.2 {
+  DROP TRIGGER tr1;
+}
+
+finish_test