diff --git a/tests/test-cat b/tests/test-cat
--- a/tests/test-cat
+++ b/tests/test-cat
@@ -9,7 +9,6 @@ hg ci -A -m m -d "1000000 0"
 hg rm a
 hg cat a
 hg cat --decode a # more tests in test-encode
-sleep 1 # make sure mtime is changed
 echo 1 > b
 hg ci -m m -d "1000000 0"
 echo 2 > b
diff --git a/tests/test-keyword b/tests/test-keyword
--- a/tests/test-keyword
+++ b/tests/test-keyword
@@ -158,8 +158,7 @@ echo % commit
 hg --debug commit -ma2c -d '1 0' -u 'User Name <user@example.com>'
 echo % cat a c
 cat a c
-echo % touch copied c after 1 second
-sleep 1
+echo % touch copied c
 touch c
 echo % status
 hg status
diff --git a/tests/test-keyword.out b/tests/test-keyword.out
--- a/tests/test-keyword.out
+++ b/tests/test-keyword.out
@@ -230,7 +230,7 @@ xxx $
 expand $Id: c,v e22d299ac0c2 1970/01/01 00:00:01 user $
 do not process $Id:
 xxx $
-% touch copied c after 1 second
+% touch copied c
 % status
 % kwfiles
 a
diff --git a/tests/test-status b/tests/test-status
--- a/tests/test-status
+++ b/tests/test-status
@@ -23,7 +23,6 @@ cd repo2
 touch modified removed deleted ignored
 echo "^ignored$" > .hgignore
 hg ci -A -m 'initial checkin' -d "1000000 0"
-sleep 1 # make sure mtime is changed
 touch modified added unknown ignored
 hg add added
 hg remove removed