diff --git a/tests/integration/long_callback/app_page_cancel.py b/tests/integration/long_callback/app_page_cancel.py
index 5134ad7a14..d99ed6ac82 100644
--- a/tests/integration/long_callback/app_page_cancel.py
+++ b/tests/integration/long_callback/app_page_cancel.py
@@ -1,7 +1,5 @@
 from dash import Dash, Input, Output, dcc, html, page_container, register_page
 
-import time
-
 from tests.integration.long_callback.utils import get_long_callback_manager
 
 long_callback_manager = get_long_callback_manager()
@@ -23,7 +21,7 @@
         page_container,
     ]
 )
-
+app.test_lock = lock = long_callback_manager.test_lock
 
 register_page(
     "one",
@@ -78,7 +76,8 @@ def on_click_no_cancel(_):
     interval=300,
 )
 def on_click1(n_clicks):
-    time.sleep(2)
+    with lock:
+        pass
     return f"Click {n_clicks}"
 
 
@@ -97,7 +96,8 @@ def on_click1(n_clicks):
     interval=300,
 )
 def on_click1(n_clicks):
-    time.sleep(2)
+    with lock:
+        pass
     return f"Click {n_clicks}"
 
 
diff --git a/tests/integration/long_callback/test_basic_long_callback016.py b/tests/integration/long_callback/test_basic_long_callback016.py
index 9b8f781ed2..e822a408e4 100644
--- a/tests/integration/long_callback/test_basic_long_callback016.py
+++ b/tests/integration/long_callback/test_basic_long_callback016.py
@@ -1,5 +1,4 @@
 import sys
-import time
 
 import pytest
 
@@ -12,32 +11,37 @@
 def test_lcbc016_multi_page_cancel(dash_duo, manager):
     with setup_long_callback_app(manager, "app_page_cancel") as app:
         dash_duo.start_server(app)
-        dash_duo.find_element("#start1").click()
-        dash_duo.wait_for_text_to_equal("#progress1", "running")
-        dash_duo.find_element("#shared_cancel").click()
-        dash_duo.wait_for_text_to_equal("#progress1", "idle")
-        time.sleep(2.1)
+
+        with app.test_lock:
+            dash_duo.find_element("#start1").click()
+            dash_duo.wait_for_text_to_equal("#progress1", "running")
+            dash_duo.find_element("#shared_cancel").click()
+            dash_duo.wait_for_text_to_equal("#progress1", "idle")
+
         dash_duo.wait_for_text_to_equal("#output1", "initial")
 
-        dash_duo.find_element("#start1").click()
-        dash_duo.wait_for_text_to_equal("#progress1", "running")
-        dash_duo.find_element("#cancel1").click()
-        dash_duo.wait_for_text_to_equal("#progress1", "idle")
-        time.sleep(2.1)
+        with app.test_lock:
+            dash_duo.find_element("#start1").click()
+            dash_duo.wait_for_text_to_equal("#progress1", "running")
+            dash_duo.find_element("#cancel1").click()
+            dash_duo.wait_for_text_to_equal("#progress1", "idle")
+
         dash_duo.wait_for_text_to_equal("#output1", "initial")
 
         dash_duo.server_url = dash_duo.server_url + "/2"
 
-        dash_duo.find_element("#start2").click()
-        dash_duo.wait_for_text_to_equal("#progress2", "running")
-        dash_duo.find_element("#shared_cancel").click()
-        dash_duo.wait_for_text_to_equal("#progress2", "idle")
-        time.sleep(2.1)
+        with app.test_lock:
+            dash_duo.find_element("#start2").click()
+            dash_duo.wait_for_text_to_equal("#progress2", "running")
+            dash_duo.find_element("#shared_cancel").click()
+            dash_duo.wait_for_text_to_equal("#progress2", "idle")
+
         dash_duo.wait_for_text_to_equal("#output2", "initial")
 
-        dash_duo.find_element("#start2").click()
-        dash_duo.wait_for_text_to_equal("#progress2", "running")
-        dash_duo.find_element("#cancel2").click()
-        dash_duo.wait_for_text_to_equal("#progress2", "idle")
-        time.sleep(2.1)
+        with app.test_lock:
+            dash_duo.find_element("#start2").click()
+            dash_duo.wait_for_text_to_equal("#progress2", "running")
+            dash_duo.find_element("#cancel2").click()
+            dash_duo.wait_for_text_to_equal("#progress2", "idle")
+
         dash_duo.wait_for_text_to_equal("#output2", "initial")