diff --git a/test/test-exec-deserialization.py b/test/test-exec-deserialization.py
index 46627add91..eea7ddc8b3 100755
--- a/test/test-exec-deserialization.py
+++ b/test/test-exec-deserialization.py
@@ -12,9 +12,9 @@
 import os
 import subprocess
 import sys
-import tempfile
 import time
 import unittest
+import uuid
 from enum import Enum
 
 
@@ -30,7 +30,7 @@ class ExecutionResumeTest(unittest.TestCase):
     def setUp(self):
         self.unit = 'test-issue-518.service'
         self.unitfile_path = f'/run/systemd/system/{self.unit}'
-        self.output_file = tempfile.mktemp()
+        self.output_file = f"/tmp/test-issue-518-{uuid.uuid4()}"
         self.unit_files = {}
 
         unit_file_content = f'''
@@ -82,7 +82,7 @@ class ExecutionResumeTest(unittest.TestCase):
         Type=oneshot
         ExecStart=/bin/bash -c "echo bar >> {self.output_file}"
         ExecStart=/bin/bash -c "echo baz >> {self.output_file}"
-        '''.format(self.output_file)
+        '''
         self.unit_files[UnitFileChange.REMOVAL] = unit_file_content
 
     def reload(self):