diff --git a/test/minimail.py b/test/minimail.py
index 75b6635..a8ab7f9 100644
--- a/test/minimail.py
+++ b/test/minimail.py
@@ -6,13 +6,15 @@
 # this file is under GNU General Public License 3.0
 
 
+import pathlib
 import pEp
 from secrets import token_urlsafe
 
 
 def send(msg):
     name = token_urlsafe(16) + ".eml"
-    with open("../TestInbox/" + name, "wb") as f:
+    parent = pathlib.Path("..")
+    with open(parent / "TestInbox" / name, "wb") as f:
         f.write(str(msg).encode())
 
 
diff --git a/test/sync_test.py b/test/sync_test.py
index ca5f16d..a29efc2 100644
--- a/test/sync_test.py
+++ b/test/sync_test.py
@@ -5,10 +5,9 @@
 
 # this file is under GNU General Public License 3.0
 
-# this test is only running on POSIX systems
 
-
-import os, pathlib
+import os
+import pathlib
 
 
 def test_for(path):