test_call_script: update poll ending condition to avoid race (#2583)

integration/test_call_script.py

@@ -312,7 +312,7 @@ def test_call_script(
     update_counter_button.click()
     assert call_script.poll_for_value(counter, exp_not_equal="0") == "4"
     reset_button.click()
-    assert call_script.poll_for_value(counter, exp_not_equal="3") == "0"
+    assert call_script.poll_for_value(counter, exp_not_equal="4") == "0"
     return_button.click()
     update_counter_button.click()
     assert call_script.poll_for_value(counter, exp_not_equal="0") == "1"
@@ -330,7 +330,7 @@ def test_call_script(
         script,
     )
     reset_button.click()
-    assert call_script.poll_for_value(counter, exp_not_equal="3") == "0"
+    assert call_script.poll_for_value(counter, exp_not_equal="4") == "0"
 
     return_callback_button.click()
     update_counter_button.click()