diff --git a/tests/lib/testing_classes.py b/tests/lib/testing_classes.py
index b7993ec4ba..77e1ec4eb7 100644
--- a/tests/lib/testing_classes.py
+++ b/tests/lib/testing_classes.py
@@ -51,8 +51,6 @@ class ModuleUnitTest(BaseTest):
 
     TEST_DATA_FOLDER = None
 
-    failed = False
-
     @pytest.fixture(scope='session')
     def monkeypatch_session(self):
         """Monkeypatch couldn't be used with module or session fixtures."""
@@ -83,7 +81,7 @@ class ModuleUnitTest(BaseTest):
                 print("Temporary folder created:: {}".format(tmpdir))
                 yield tmpdir
 
-                persist = persist or self.PERSIST or self.failed
+                persist = persist or self.PERSIST or ModuleUnitTest.failed
                 if not persist:
                     print("Removing {}".format(tmpdir))
                     shutil.rmtree(tmpdir)
@@ -146,7 +144,7 @@ class ModuleUnitTest(BaseTest):
 
         yield db_handler
 
-        persist = self.PERSIST or self.failed
+        persist = self.PERSIST or ModuleUnitTest.failed
         if not persist:
             db_handler.teardown(self.TEST_DB_NAME)
             db_handler.teardown(self.TEST_OPENPYPE_NAME)
@@ -308,7 +306,7 @@ class PublishTest(ModuleUnitTest):
         while launched_app.poll() is None:
             time.sleep(0.5)
             if time.time() - time_start > timeout:
-                self.failed = True
+                ModuleUnitTest.failed = True
                 launched_app.terminate()
                 raise ValueError("Timeout reached")
 
@@ -347,7 +345,7 @@ class PublishTest(ModuleUnitTest):
 
         not_matched = expected.symmetric_difference(filtered_published)
         if not_matched:
-            self.failed = True
+            ModuleUnitTest.failed = True
             raise AssertionError("Missing {} files".format(
                 "\n".join(sorted(not_matched))))
 
@@ -364,7 +362,7 @@ class DeadlinePublishTest(PublishTest):
         while launched_app.poll() is None:
             time.sleep(0.5)
             if time.time() - time_start > timeout:
-                self.failed = True
+                ModuleUnitTest.failed = True
                 launched_app.terminate()
                 raise ValueError("Timeout reached")
 
@@ -373,11 +371,11 @@ class DeadlinePublishTest(PublishTest):
                                                "**/*_metadata.json"),
                                   recursive=True)
         if not metadata_json:
-            self.failed = True
+            ModuleUnitTest.failed = True
             raise RuntimeError("No metadata file found. No job id.")
 
         if len(metadata_json) > 1:
-            self.failed = True
+            ModuleUnitTest.failed = True
             raise RuntimeError("Too many metadata files found.")
 
         with open(metadata_json[0]) as fp:
@@ -390,7 +388,7 @@ class DeadlinePublishTest(PublishTest):
         deadline_url = deadline_module.deadline_urls["default"]
 
         if not deadline_url:
-            self.failed = True
+            ModuleUnitTest.failed = True
             raise ValueError("Must have default deadline url.")
 
         url = "{}/api/jobs?JobId={}".format(deadline_url, deadline_job_id)
@@ -400,17 +398,17 @@ class DeadlinePublishTest(PublishTest):
         while not valid_date_finished:
             time.sleep(0.5)
             if time.time() - time_start > timeout:
-                self.failed = True
+                ModuleUnitTest.failed = True
                 raise ValueError("Timeout for DL finish reached")
 
             response = requests.get(url, timeout=10)
             if not response.ok:
-                self.failed = True
+                ModuleUnitTest.failed = True
                 msg = "Couldn't connect to {}".format(deadline_url)
                 raise RuntimeError(msg)
 
             if not response.json():
-                self.failed = True
+                ModuleUnitTest.failed = True
                 raise ValueError("Couldn't find {}".format(deadline_job_id))
 
             # '0001-...' returned until job is finished