t/extsearch.t             | 2 ++
 t/purge.t                 | 1 +
 t/replace.t               | 1 +
 t/v1reindex.t             | 1 +
 t/v2-add-remove-add.t     | 1 +
 t/v2mirror.t              | 1 +
 t/v2reindex.t             | 1 +
 t/v2writable.t            | 1 +
 t/watch_filter_rubylang.t | 2 ++
 t/watch_maildir_v2.t      | 1 +

diff --git a/t/extsearch.t b/t/extsearch.t
index d199fc7b9804055fec9c79f2a79ed1a4d3f7489c..ae889ac67837969c214c98d8fdc5652460308f0f 100644
--- a/t/extsearch.t
+++ b/t/extsearch.t
@@ -236,6 +236,7 @@ }
 
 if ('reindex catches missed messages') {
 	my $v2ibx = $cfg->lookup_name('v2test');
+	$v2ibx->{-no_fsync} = 1;
 	my $im = PublicInbox::InboxWritable->new($v2ibx)->importer(0);
 	my $cmt_a = $v2ibx->mm->last_commit_xap($schema_version, 0);
 	my $eml = eml_load('t/data/0001.patch');
@@ -296,6 +297,7 @@
 if ('reindex catches content bifurcation') {
 	use PublicInbox::MID qw(mids);
 	my $v2ibx = $cfg->lookup_name('v2test');
+	$v2ibx->{-no_fsync} = 1;
 	my $im = PublicInbox::InboxWritable->new($v2ibx)->importer(0);
 	my $eml = eml_load('t/data/message_embed.eml');
 	my $cmt_a = $v2ibx->mm->last_commit_xap($schema_version, 0);
diff --git a/t/purge.t b/t/purge.t
index f4281c1397bd5d87d2dbdef7cdc7644a1d15b9d8..a33cd3290fc6ca7b000a1bac0e8e5ec9a4b08e58 100644
--- a/t/purge.t
+++ b/t/purge.t
@@ -16,6 +16,7 @@ my $ibx = PublicInbox::Inbox->new({
 	inboxdir => $inboxdir,
 	name => 'test-v2purge',
 	version => 2,
+	-no_fsync => 1,
 	-primary_address => 'test@example.com',
 	indexlevel => 'basic',
 });
diff --git a/t/replace.t b/t/replace.t
index 51bdb964dd3a05ca51578514d1de831b660e7b4b..626cbe9b091bedcc9055c603a35fc262a4f29c81 100644
--- a/t/replace.t
+++ b/t/replace.t
@@ -20,6 +20,7 @@ 	my $ibx = PublicInbox::Inbox->new({
 		inboxdir => "$tmpdir/testbox",
 		name => $this,
 		version => $v,
+		-no_fsync => 1,
 		-primary_address => 'test@example.com',
 		indexlevel => $level,
 	});
diff --git a/t/v1reindex.t b/t/v1reindex.t
index 36cefda5514786ebcec8bb428069c23828639247..f593b3239586e0a013f155451dc9e67138c9b874 100644
--- a/t/v1reindex.t
+++ b/t/v1reindex.t
@@ -18,6 +18,7 @@ 	inboxdir => $inboxdir,
 	name => 'test-v1reindex',
 	-primary_address => 'test@example.com',
 	indexlevel => 'full',
+	-no_fsync => 1,
 };
 my $mime = PublicInbox::Eml->new(<<'EOF');
 From: a@example.com
diff --git a/t/v2-add-remove-add.t b/t/v2-add-remove-add.t
index b325e521403a2d6833fbd64f1cd7205bea759ab0..579cdcb679fea75c7f71fe5369278a54ba0cdd10 100644
--- a/t/v2-add-remove-add.t
+++ b/t/v2-add-remove-add.t
@@ -13,6 +13,7 @@ my $ibx = {
 	inboxdir => "$inboxdir/v2",
 	name => 'test-v2writable',
 	version => 2,
+	-no_fsync => 1,
 	-primary_address => 'test@example.com',
 };
 $ibx = PublicInbox::Inbox->new($ibx);
diff --git a/t/v2mirror.t b/t/v2mirror.t
index 12e3fcd0403600b891e4868a0ec7fb8e4a81f989..012e5bd265832f49a66d4ad02a510c9cc8c2ea91 100644
--- a/t/v2mirror.t
+++ b/t/v2mirror.t
@@ -36,6 +36,7 @@ my $cfg = PublicInbox::Config->new($pi_config);
 my $ibx = $cfg->lookup('test@example.com');
 ok($ibx, 'inbox found');
 $ibx->{version} = 2;
+$ibx->{-no_fsync} = 1;
 my $v2w = PublicInbox::V2Writable->new($ibx, 1);
 ok $v2w, 'v2w loaded';
 $v2w->{parallel} = 0;
diff --git a/t/v2reindex.t b/t/v2reindex.t
index a931225c74b7e479e69436bf47f41eac6ee3c55a..1145e31b414e7118b49a66766c4c358f7f6453ed 100644
--- a/t/v2reindex.t
+++ b/t/v2reindex.t
@@ -18,6 +18,7 @@ 	name => 'test-v2writable',
 	version => 2,
 	-primary_address => 'test@example.com',
 	indexlevel => 'full',
+	-no_fsync => 1,
 };
 my $agpl = do {
 	open my $fh, '<', 'COPYING' or die "can't open COPYING: $!";
diff --git a/t/v2writable.t b/t/v2writable.t
index f0fa8a79548daaca8ff120697dfd3b699204756a..d9e7b9809fccb1b8f6980e2263e14a9785846e1d 100644
--- a/t/v2writable.t
+++ b/t/v2writable.t
@@ -17,6 +17,7 @@ my $ibx = {
 	inboxdir => $inboxdir,
 	name => 'test-v2writable',
 	version => 2,
+	-no_fsync => 1,
 	-primary_address => 'test@example.com',
 };
 $ibx = PublicInbox::Inbox->new($ibx);
diff --git a/t/watch_filter_rubylang.t b/t/watch_filter_rubylang.t
index 29a9f793858c564d75f7f8b058b71b2f278e5777..5deb20820b239dce05ff1f62790cfe59f9160a93 100644
--- a/t/watch_filter_rubylang.t
+++ b/t/watch_filter_rubylang.t
@@ -74,6 +74,7 @@ publicinboxwatch.watchspam=maildir:$spamdir
 EOF
 	my $cfg = PublicInbox::Config->new(\$orig);
 	my $ibx = $cfg->lookup_name($v);
+	$ibx->{-no_fsync} = 1;
 	ok($ibx, 'found inbox by name');
 
 	my $w = PublicInbox::Watch->new($cfg);
@@ -103,6 +104,7 @@ 	$w->scan('full');
 
 	$cfg = PublicInbox::Config->new(\$orig);
 	$ibx = $cfg->lookup_name($v);
+	$ibx->{-no_fsync} = 1;
 	is($ibx->search->reopen->mset('b:spam')->size, 0, 'spam removed');
 
 	is_deeply([], \@warn, 'no warnings');
diff --git a/t/watch_maildir_v2.t b/t/watch_maildir_v2.t
index 195e238b1a93d8efb71570cc6ba36be176b15e56..7b46232b36beab4473437f0505b3db5ab705396a 100644
--- a/t/watch_maildir_v2.t
+++ b/t/watch_maildir_v2.t
@@ -47,6 +47,7 @@ EOF
 my $cfg = PublicInbox::Config->new(\$orig);
 my $ibx = $cfg->lookup_name('test');
 ok($ibx, 'found inbox by name');
+$ibx->{-no_fsync} = 1;
 
 PublicInbox::Watch->new($cfg)->scan('full');
 my $total = scalar @{$ibx->over->recent};