diff --git a/kfet/open/tests.py b/kfet/open/tests.py
index b4481994..4e652cb6 100644
--- a/kfet/open/tests.py
+++ b/kfet/open/tests.py
@@ -1,5 +1,5 @@
 import json
-import threading
+import random
 from datetime import timedelta
 from unittest import mock
 
@@ -18,7 +18,7 @@ class OpenKfetTest(ChannelTestCase):
 
     def setUp(self):
         self.kfet_open = OpenKfet(
-            cache_prefix="test_kfetopen_%s" % threading.get_ident()
+            cache_prefix="test_kfetopen_%s" % random.randrange(2 ** 20)
         )
         self.addCleanup(self.kfet_open.clear_cache)
 
@@ -138,7 +138,7 @@ class OpenKfetViewsTest(ChannelTestCase):
         self.c_a.login(username="admin", password="admin")
 
         self.kfet_open = OpenKfet(
-            cache_prefix="test_kfetopen_%s" % threading.get_ident()
+            cache_prefix="test_kfetopen_%s" % random.randrange(2 ** 20)
         )
         self.addCleanup(self.kfet_open.clear_cache)
 
@@ -244,7 +244,7 @@ class OpenKfetScenarioTest(ChannelTestCase):
         self.r_c_ws.force_login(self.r)
 
         self.kfet_open = OpenKfet(
-            cache_prefix="test_kfetopen_%s" % threading.get_ident()
+            cache_prefix="test_kfetopen_%s" % random.randrange(2 ** 20)
         )
         self.addCleanup(self.kfet_open.clear_cache)
 
diff --git a/kfet/views.py b/kfet/views.py
index a2a69930..51bfc1a4 100644
--- a/kfet/views.py
+++ b/kfet/views.py
@@ -1301,13 +1301,27 @@ def kpsul_cancel_operations(request):
                 stock=F("stock") + to_articles_stocks[article]
             )
 
+    # Need refresh from db cause we used update on querysets.
+    # Sort objects by pk to get deterministic responses.
+    opegroups_pk = [opegroup.pk for opegroup in to_groups_amounts]
+    opegroups = (
+        OperationGroup.objects.values("id", "amount", "is_cof")
+        .filter(pk__in=opegroups_pk)
+        .order_by("pk")
+    )
+    opes = sorted(opes)
+    checkouts_pk = [checkout.pk for checkout in to_checkouts_balances]
+    checkouts = (
+        Checkout.objects.values("id", "balance")
+        .filter(pk__in=checkouts_pk)
+        .order_by("pk")
+    )
+    articles_pk = [article.pk for articles in to_articles_stocks]
+    articles = Article.objects.values("id", "stock").filter(pk__in=articles_pk)
+
     # Websocket data
     websocket_data = {"opegroups": [], "opes": [], "checkouts": [], "articles": []}
-    # Need refresh from db cause we used update on querysets
-    opegroups_pk = [opegroup.pk for opegroup in to_groups_amounts]
-    opegroups = OperationGroup.objects.values("id", "amount", "is_cof").filter(
-        pk__in=opegroups_pk
-    )
+
     for opegroup in opegroups:
         websocket_data["opegroups"].append(
             {
@@ -1327,16 +1341,10 @@ def kpsul_cancel_operations(request):
                 "canceled_at": canceled_at,
             }
         )
-    # Need refresh from db cause we used update on querysets
-    checkouts_pk = [checkout.pk for checkout in to_checkouts_balances]
-    checkouts = Checkout.objects.values("id", "balance").filter(pk__in=checkouts_pk)
     for checkout in checkouts:
         websocket_data["checkouts"].append(
             {"id": checkout["id"], "balance": checkout["balance"]}
         )
-    # Need refresh from db cause we used update on querysets
-    articles_pk = [article.pk for articles in to_articles_stocks]
-    articles = Article.objects.values("id", "stock").filter(pk__in=articles_pk)
     for article in articles:
         websocket_data["articles"].append(
             {"id": article["id"], "stock": article["stock"]}