diff --git a/plugins/PostProcessingPlugin/tests/TestPostProcessingPlugin.py b/plugins/PostProcessingPlugin/tests/TestPostProcessingPlugin.py
index 241b7ef07d..a5ef9e47c9 100644
--- a/plugins/PostProcessingPlugin/tests/TestPostProcessingPlugin.py
+++ b/plugins/PostProcessingPlugin/tests/TestPostProcessingPlugin.py
@@ -3,8 +3,6 @@ import os
 import sys
 from unittest.mock import patch, MagicMock
 
-from pytest import fixture
-
 from UM.Resources import Resources
 from UM.Trust import Trust
 from ..PostProcessingPlugin import PostProcessingPlugin
@@ -30,25 +28,17 @@ def test_community_bundled_script_allowed():
 def test_enterprise_unsigned_user_script_not_allowed():
     assert not PostProcessingPlugin._isScriptAllowed("blaat.py")
 
-@fixture
-def mocked_get_instance_or_none():
-    mocked_trust = MagicMock()
-    mocked_trust.signedFileCheck = MagicMock(return_value=True)
-    return mocked_trust
-
-@fixture
-def mocked_get_signature_file_exists_for():
-    return MagicMock(return_value=True)
-
 # noinspection PyProtectedMember
 @patch("cura.ApplicationMetadata.IsEnterpriseVersion", True)
-@patch("UM.Trust", "signatureFileExistsFor")
-@patch("UM.Trust.Trust.getInstanceOrNone")
-def test_enterprise_signed_user_script_allowed(mocked_instance_or_none, mocked_get_instance_or_none):
-    file_path = "blaat.py"
+def test_enterprise_signed_user_script_allowed():
+    mocked_trust = MagicMock()
+    mocked_trust.signedFileCheck = MagicMock(return_value=True)
+
     realSignatureFileExistsFor = Trust.signatureFileExistsFor
     Trust.signatureFileExistsFor = MagicMock(return_value=True)
-    assert PostProcessingPlugin._isScriptAllowed(file_path)
+
+    with patch("UM.Trust.Trust.getInstanceOrNone", return_value=mocked_trust):
+        assert PostProcessingPlugin._isScriptAllowed("blaat.py")
 
     # cleanup
     Trust.signatureFileExistsFor = realSignatureFileExistsFor