Index: test/crash8.test
==================================================================
--- test/crash8.test
+++ test/crash8.test
@@ -350,11 +350,15 @@
 
 #
 # Since the following tests (crash8-5.*) rely upon being able
 # to copy a file while open, they will not work on Windows.
 #
-if {$::tcl_platform(platform)=="unix"} {
+# They also depend on being able to copy the journal file, which
+# is not created on F2FS file-systems that support atomic
+# write. So do not run these tests in that case either.
+#
+if {$::tcl_platform(platform)=="unix" && [atomic_batch_write test.db]==0 } {
   for {set i 1} {$i < 10} {incr i} {
     catch { db close }
     forcedelete test.db test.db-journal
     sqlite3 db test.db
     do_test crash8-5.$i.1 {

Index: test/speed4p.test
==================================================================
--- test/speed4p.test
+++ test/speed4p.test
@@ -166,11 +166,10 @@
 # Single-row updates performance.
 #
 set script {
   db eval BEGIN
   for {set ii 1} {$ii < 10000} {incr ii} {
-    set v [expr {$ii*3}]
     db eval {UPDATE t1 SET i=i+1 WHERE rowid=$ii}
   }
   db eval COMMIT
 }
 speed_trial_tcl speed4p-rowid-update 10000 stmt $script