diff --git a/test/app/fio.result b/test/app/fio.result
index cd18ed32c7020c529e59fed6e3c296dc0236329d..783fa4fab5daf80660992d0cb9681ab0b56e7434 100644
--- a/test/app/fio.result
+++ b/test/app/fio.result
@@ -1465,7 +1465,7 @@ cwd = fio.cwd()
 old_tmpdir = os.getenv('TMPDIR')
 ---
 ...
-tmpdir = cwd..'/tmp'
+tmpdir = cwd..'/tmp-.dot.-'
 ---
 ...
 fio.mkdir(tmpdir)
@@ -1478,7 +1478,7 @@ os.setenv('TMPDIR', tmpdir)
 dir = fio.tempdir()
 ---
 ...
-dir:find(tmpdir) ~= nil or {dir, tmpdir}
+dir:startswith(tmpdir) or {dir, tmpdir}
 ---
 - true
 ...
@@ -1503,7 +1503,7 @@ os.setenv('TMPDIR', nil)
 dir = fio.tempdir()
 ---
 ...
-dir:find('/tmp') ~= nil or dir
+dir:startswith('/tmp') or dir
 ---
 - true
 ...
diff --git a/test/app/fio.test.lua b/test/app/fio.test.lua
index 242ff08ad7c75915d0869f7ee8e57f3bbbf331b0..6825b882f420af4cf118cc83af950481cba00c20 100644
--- a/test/app/fio.test.lua
+++ b/test/app/fio.test.lua
@@ -481,11 +481,11 @@ fio.mktree('/dev/null/dir')
 cwd = fio.cwd()
 old_tmpdir = os.getenv('TMPDIR')
 
-tmpdir = cwd..'/tmp'
+tmpdir = cwd..'/tmp-.dot.-'
 fio.mkdir(tmpdir)
 os.setenv('TMPDIR', tmpdir)
 dir = fio.tempdir()
-dir:find(tmpdir) ~= nil or {dir, tmpdir}
+dir:startswith(tmpdir) or {dir, tmpdir}
 fio.stat(dir) ~= nil or fio.stat(dir)
 
 tmpdir = cwd..'/tmp2'
@@ -494,7 +494,7 @@ fio.tempdir()
 
 os.setenv('TMPDIR', nil)
 dir = fio.tempdir()
-dir:find('/tmp') ~= nil or dir
+dir:startswith('/tmp') or dir
 
 tmpdir = cwd..'/'..string.rep('t', 5000)
 os.setenv('TMPDIR', tmpdir)