diff --git a/manifest b/manifest
index dc4df5870e..d4d8df874f 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Fix\sproblems\swith\stest\sscripts\spreventing\sthem\sfrom\srunning\swith\sSQLITE_DEFAULT_MEMSTATUS=0\sbuilds.\sOr\sbuilds\swithout\sSQLITE_ENABLE_STAT4.
-D 2023-02-06T11:02:31.024
+C Add\sthe\s--fuzztest\soption\sto\stestrunner.tcl.\sAlso,\shave\sit\sprint\swhitespace\sover\sthe\stop\sof\sthe\sold\sreport\sline\sbefore\swriting\sthe\snew.
+D 2023-02-06T11:43:22.002
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -1566,7 +1566,7 @@ F test/temptable2.test 76821347810ecc88203e6ef0dd6897b6036ac788e9dd3e6b04fd4d163
 F test/temptable3.test d11a0974e52b347e45ee54ef1923c91ed91e4637
 F test/temptrigger.test 38f0ca479b1822d3117069e014daabcaacefffcc
 F test/tester.tcl 8d54d40a55e12554b4509bc12078b201b233c8e842a7543629094a21b1ba956d
-F test/testrunner.tcl 3723cfa0e01b69bc3c6a4c2f4a35f8fcec23e3cd048c5f827fcf15b189d2a92a
+F test/testrunner.tcl fb6249e9538470959b4957a39e80376a2fb9f157c67dde2c020273a2b96af947
 F test/testrunner_data.tcl 8169c68654ac8906833b8a6aadca973358a441ebf88270dd05c153e5f96f76b8
 F test/thread001.test a0985c117eab62c0c65526e9fa5d1360dd1cac5b03bde223902763274ce21899
 F test/thread002.test c24c83408e35ba5a952a3638b7ac03ccdf1ce4409289c54a050ac4c5f1de7502
@@ -2048,8 +2048,8 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 81c118d90b281b30f40b3eeefaeb2c8350aa40080b4fe7de8f21d263986c6acb
-R 68c36f7c3bbb0cdfa62cb3d6ed79f926
+P c0fbc89ed26b6eb361c1a05e2fb0d78d101fe2daf2947bbe5e0e58e0c2a779a2
+R ca675ab264210e4a6c7241a547c972b1
 U dan
-Z c7cd20985880e33926ac0c89209760a5
+Z a02e7b99f420dffa9a6626f8f58a89b3
 # Remove this line to create a well-formed Fossil manifest.
diff --git a/manifest.uuid b/manifest.uuid
index 0ffc21a2a5..8885cbe64c 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-c0fbc89ed26b6eb361c1a05e2fb0d78d101fe2daf2947bbe5e0e58e0c2a779a2
\ No newline at end of file
+d83ce01fe1f21edcc93ad4c6308026156f235bab75e16e15389e27ad388fb274
\ No newline at end of file
diff --git a/test/testrunner.tcl b/test/testrunner.tcl
index 0802ca7024..8052860b6b 100644
--- a/test/testrunner.tcl
+++ b/test/testrunner.tcl
@@ -23,6 +23,7 @@ Usage:
 
   where SWITCHES are:
     --jobs NUMBER-OF-JOBS
+    --fuzztest
 
 Interesting values for PERMUTATION are:
 
@@ -45,6 +46,11 @@ If a PERMUTATION is specified and is followed by the path to a Tcl script
 instead of a list of patterns, then that single Tcl test script is run
 with the specified permutation.
 
+The --fuzztest option is ignored if the PERMUTATION is "release". Otherwise,
+if it is present, then "make -C <dir> fuzztest" is run as part of the tests,
+where <dir> is the directory containing the testfixture binary used to
+run the script.
+
 The "status" and "njob" commands are designed to be run from the same
 directory as a running testrunner.tcl script that is running tests. The
 "status" command prints a report describing the current state and progress 
@@ -99,6 +105,7 @@ set TRG(nJob)    [default_njob]     ;# Default number of helper processes
 set TRG(patternlist) [list]
 set TRG(cmdline) $argv
 set TRG(reporttime) 2000
+set TRG(fuzztest) 0                 ;# is the fuzztest option present.
 
 switch -nocase -glob -- $tcl_platform(os) {
   *darwin* {
@@ -114,7 +121,7 @@ switch -nocase -glob -- $tcl_platform(os) {
   *win* {
     set TRG(platform) win
     set TRG(make)     make.bat
-    set TRG(makecmd)     make.bat
+    set TRG(makecmd)  make.bat
   }
   default {
     error "cannot determine platform!"
@@ -335,6 +342,8 @@ for {set ii 0} {$ii < [llength $argv]} {incr ii} {
       incr ii
       set TRG(nJob) [lindex $argv $ii]
       if {$isLast} { usage }
+    } elseif {($n>2 && [string match "$a*" --fuzztest]) || $a=="-f"} {
+      set TRG(fuzztest) 1
     } else {
       usage
     }
@@ -422,6 +431,7 @@ proc build_to_dirname {bname} {
 #    {BUILD CONFIG FILENAME} {BUILD CONFIG FILENAME} ...
 #
 proc testset_patternlist {patternlist} {
+  global TRG
 
   set testset [list]              ;# return value
 
@@ -452,6 +462,8 @@ proc testset_patternlist {patternlist} {
       }
     }
 
+    set TRG(fuzztest) 0           ;# ignore --fuzztest option in this case
+
   } elseif {$first=="all"} {
 
     set clist [trd_all_configs]
@@ -468,6 +480,10 @@ proc testset_patternlist {patternlist} {
   } else {
     testset_append testset "" full $patternlist
   }
+  if {$TRG(fuzztest)} {
+    if {$TRG(platform)=="win"} { error "todo" }
+    lappend testset [list "" make fuzztest]
+  }
 
   set testset
 }
@@ -586,6 +602,11 @@ proc make_new_testset {} {
         close $fd
       }
 
+      if {$c=="make" && $b==""} {
+        # --fuzztest option
+        set slow 1
+      }
+
       if {$c=="veryquick"} {
         set c ""
       }
@@ -698,9 +719,20 @@ proc launch_another_job {iJob} {
     set dir $builddir
 
   } elseif {$c=="make"} {
-    set builddir [build_to_dirname $b]
-    copy_dir $builddir $dir
-    set cmd "$TRG(makecmd) $f"
+    if {$b==""} {
+      if {$f!="fuzztest"} { error "corruption in testrunner.db!" }
+      # Special case - run [make fuzztest] 
+      set makedir [file dirname $testfixture]
+      if {$TRG(platform)=="win"} {
+        error "how?"
+      } else {
+        set cmd [list make -C $makedir fuzztest]
+      }
+    } else {
+      set builddir [build_to_dirname $b]
+      copy_dir $builddir $dir
+      set cmd "$TRG(makecmd) $f"
+    }
   } else {
     if {$b==""} {
       set testfixture [info nameofexec]
@@ -763,8 +795,14 @@ proc one_line_report {} {
     lappend text "$j: ($fin/$t($j)) f=$v(failed,$j) r=$v(running,$j)"
   }
 
-  puts -nonewline "${tm}s: [join $text { || }]\r"
+  if {[info exists TRG(reportlength)]} {
+    puts -nonewline "[string repeat " " $TRG(reportlength)]\r"
+  }
+  set report "${tm}s: [join $text { || }]"
+  set TRG(reportlength) [string length $report]
+  puts -nonewline "$report\r"
   flush stdout
+
   after $TRG(reporttime) one_line_report
 }