diff --git a/ext/fts5/test/fts5secure3.test b/ext/fts5/test/fts5secure3.test
index 70c2028..bc56e08 100644
--- a/ext/fts5/test/fts5secure3.test
+++ b/ext/fts5/test/fts5secure3.test
@@ -9,6 +9,8 @@
 #
 #*************************************************************************
 #
+# TESTRUNNER: slow
+#
 
 source [file join [file dirname [info script]] fts5_common.tcl]
 ifcapable !fts5 { finish_test ; return }
@@ -142,8 +144,10 @@
     DELETE FROM fff WHERE rowid=$ii;
   }
   #if {$iTest==1} { dump fff }
-  do_execsql_test 3.1.$iTest.$ii.ic {
-    INSERT INTO fff(fff) VALUES('integrity-check');
+  if {($iTest % 20)==0} {
+    do_execsql_test 3.1.$iTest.$ii.ic {
+      INSERT INTO fff(fff) VALUES('integrity-check');
+    }
   }
   #if {$iTest==1} { break }
   incr iTest
diff --git a/ext/fts5/test/fts5secure4.test b/ext/fts5/test/fts5secure4.test
index b6a3be5..48d9242 100644
--- a/ext/fts5/test/fts5secure4.test
+++ b/ext/fts5/test/fts5secure4.test
@@ -14,6 +14,10 @@
 return_if_no_fts5
 set ::testprefix fts5secure4
 
+#-------------------------------------------------------------------------
+# Test using the 'delete' command to attempt to delete a token that 
+# is not present in the index in secure-delete mode.
+#
 do_execsql_test 1.0 {
   CREATE VIRTUAL TABLE t1 USING fts5(a, b, content=x1);
 
@@ -49,6 +53,84 @@
   INSERT INTO t1(t1) VALUES('integrity-check');
 }
 
+#-------------------------------------------------------------------------
+# Test using secure-delete with detail=none or detail=col.
+#
+foreach {tn d} {1 full 2 none 3 column} {
+  reset_db
+  do_execsql_test 2.$tn.1 "
+    CREATE VIRTUAL TABLE x1 USING fts5(xx, yy, zz, detail=$d, prefix='1,2');
+    INSERT INTO x1(x1, rank) VALUES('pgsz', 64);
+  "
+
+  do_execsql_test 2.$tn.2 {
+    BEGIN;
+      INSERT INTO x1 VALUES('a b c', 'd e f', 'a b c');
+      INSERT INTO x1 VALUES('a b c', 'd e f', 'a b c');
+      INSERT INTO x1 VALUES('a b c', 'd e f', 'a b c');
+      INSERT INTO x1 VALUES('a b c', 'd e f', 'a b c');
+      INSERT INTO x1 VALUES('a b c', 'd e f', 'a b c');
+    COMMIT;
+  }
+
+  do_execsql_test 2.$tn.3 {
+    DELETE FROM x1 WHERE rowid IN (2, 4, 6);
+    INSERT INTO x1(x1) VALUES('integrity-check');
+  }
+
+  do_execsql_test 2.$tn.4 {
+    DELETE FROM x1 WHERE rowid IN (1, 3, 5);
+    INSERT INTO x1(x1) VALUES('integrity-check');
+  }
+
+  do_execsql_test 2.$tn.5 {
+    WITH s(i) AS (
+      SELECT 1 UNION ALL SELECT i+1 FROM s WHERE i<100
+    )
+    INSERT INTO x1 
+      SELECT 'seems to be', 'used brew to', 'everything is working' FROM s
+        UNION ALL
+      SELECT 'used brew to', 'everything is working', 'seems to be' FROM s
+        UNION ALL
+      SELECT 'everything is working', 'seems to be', 'used brew to' FROM s
+        UNION ALL
+      SELECT 'abc', 'zzz', 'a b c d'
+        UNION ALL
+      SELECT 'z', 'z', 'z' FROM s
+  }
+
+  do_test 2.$tn.6 {
+    for {set i 300} {$i > 200} {incr i -1} {
+      execsql {
+        DELETE FROM x1 WHERE rowid=$i;
+        INSERT INTO x1(x1) VALUES('integrity-check');
+      }
+    }
+  } {}
+
+  do_test 2.$tn.7 {
+    for {set i 1} {$i < 100} {incr i} {
+      execsql {
+        DELETE FROM x1 WHERE rowid=$i;
+        INSERT INTO x1(x1) VALUES('integrity-check');
+      }
+    }
+  } {}
+
+  do_test 2.$tn.8 {
+    foreach i [db eval {SELECT rowid FROM x1}] {
+      execsql {
+        DELETE FROM x1 WHERE rowid=$i;
+        INSERT INTO x1(x1) VALUES('integrity-check');
+      }
+    }
+  } {}
+
+  do_execsql_test 2.$tn.9 {
+    SELECT * FROM x1
+  } {}
+}
+
 
 finish_test
 
diff --git a/manifest b/manifest
index 889cc1e..44ea6b4 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Add\sextra\sOOM\stest\sfor\sthe\snew\scode\son\sthis\sbranch.
-D 2023-04-14T17:00:29.247
+C Further\stests\sfor\sfts5\ssecure-delete\smode.
+D 2023-04-14T18:00:03.868
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -189,8 +189,8 @@
 F ext/fts5/test/fts5savepoint.test fc02929f238d02a22df4172625704e029f7c1e0e92e332d654375690f8e6e43f
 F ext/fts5/test/fts5secure.test 214a561519d1b1817f146efd1057e2a97cc896e75c2accc77157d874154bda64
 F ext/fts5/test/fts5secure2.test 2e961d7eef939f294c56b5d895cac7f1c3a60b934ee2cfd5e5e620bdf1ba6bbc
-F ext/fts5/test/fts5secure3.test fd73b98a6e11038960b84109fed42f9e0a098a31338c94d07c163244d4bd7254
-F ext/fts5/test/fts5secure4.test 3eed9eaece133fa4921b4383b13f71db1c0e415324cd86bb9dc5ac91609d5776
+F ext/fts5/test/fts5secure3.test c7e1080a6912f2a3ac68f2e05b88b72a99de38543509b2bbf427cac5c9c1c610
+F ext/fts5/test/fts5secure4.test 17ac602024db3953401c3e51ad8e03de3b972c1770554585f63812ca4083550e
 F ext/fts5/test/fts5securefault.test d18e3cab7a3c4a66f44812202e1b0ea0b4bd0f9ee766951749737cfbab100e7e
 F ext/fts5/test/fts5simple.test a298670508c1458b88ce6030440f26a30673931884eb5f4094ac1773b3ba217b
 F ext/fts5/test/fts5simple2.test 258a1b0c590409bfa5271e872c79572b319d2a56554d0585f68f146a0da603f0
@@ -2057,8 +2057,8 @@
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 0268d1a59316d169927cbd4c562725e46a9023b7d7123ade911c12203e222adf
-R d8f750d5cff7a2eb655ae379ef3df034
+P 846ae7e099ce67dab6b5df0ad5648a01d7bf7f2acf8312d817ed8505d4ea5aec
+R 288b188c0f389f12eebf550efb7220b6
 U dan
-Z babd8fc4a31fce6ad5175a62742eb085
+Z 9dffa1950ad50c2fc3482bbd0532371a
 # Remove this line to create a well-formed Fossil manifest.
diff --git a/manifest.uuid b/manifest.uuid
index 294d07f..72e3e9e 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-846ae7e099ce67dab6b5df0ad5648a01d7bf7f2acf8312d817ed8505d4ea5aec
\ No newline at end of file
+c5a47063b7971868ebbb3f0718434dd6bd22d01c43697f48941df9aae3885abc
\ No newline at end of file