diff --git a/src/modules/displaymanager/tests/test-dm-gdm.py b/src/modules/displaymanager/tests/test-dm-gdm.py
index 778bb8fbb..4856e8af3 100644
--- a/src/modules/displaymanager/tests/test-dm-gdm.py
+++ b/src/modules/displaymanager/tests/test-dm-gdm.py
@@ -10,10 +10,17 @@ libcalamares.globalstorage.insert("testing", True)
 from src.modules.displaymanager import main
 default_desktop_environment = main.DesktopEnvironment("startplasma-x11", "kde-plasma.desktop")
 
-# Specific DM test
-d = main.DMgdm("/tmp")
-d.have_dm()
-d.set_autologin("d", True, default_desktop_environment)
-# .. and again (this time checks load/save)
-d.set_autologin("d", True, default_desktop_environment)
-d.set_autologin("d", True, default_desktop_environment)
+import os
+import tempfile
+with tempfile.TemporaryDirectory(prefix="calamares-gdm") as tempdir:
+    os.makedirs(tempdir + "/usr/bin")
+    os.makedirs(tempdir + "/etc/gdm3")
+    with open(tempdir + "/usr/bin/gdm3", "w") as f:
+        f.write("#! /bin/sh\n:\n")
+    # Specific DM test
+    d = main.DMgdm(tempdir)
+    assert(d.have_dm())
+    d.set_autologin("d", True, default_desktop_environment)
+    # .. and again (this time checks load/save)
+    d.set_autologin("d", True, default_desktop_environment)
+    d.set_autologin("d", True, default_desktop_environment)