diff --git a/dbms/tests/integration/test_cluster_copier/configs/config.d/ddl.xml b/dbms/tests/integration/test_cluster_copier/configs/config.d/ddl.xml
index 27e7eb0ff43..abad0dee450 100644
--- a/dbms/tests/integration/test_cluster_copier/configs/config.d/ddl.xml
+++ b/dbms/tests/integration/test_cluster_copier/configs/config.d/ddl.xml
@@ -2,8 +2,4 @@
     <distributed_ddl>
         <path>/clickhouse/task_queue/ddl</path>
     </distributed_ddl>
-
-    <merge_tree>
-        <replicated_deduplication_window>0</replicated_deduplication_window>
-    </merge_tree>
 </yandex>
\ No newline at end of file
diff --git a/dbms/tests/integration/test_cluster_copier/configs/users.xml b/dbms/tests/integration/test_cluster_copier/configs/users.xml
index 1b49e3871f2..9aa2977daeb 100644
--- a/dbms/tests/integration/test_cluster_copier/configs/users.xml
+++ b/dbms/tests/integration/test_cluster_copier/configs/users.xml
@@ -6,7 +6,7 @@
             <log_queries>1</log_queries>
 
             <!-- Remove this setting after superfluous deduplication after DROP PARTITION is fixed -->
-            <insert_deduplicate>1</insert_deduplicate>
+            <insert_deduplicate>0</insert_deduplicate>
         </default>
     </profiles>
 
diff --git a/dbms/tests/integration/test_cluster_copier/task0_description.xml b/dbms/tests/integration/test_cluster_copier/task0_description.xml
index 4edc2fc0ada..3ca3159d772 100644
--- a/dbms/tests/integration/test_cluster_copier/task0_description.xml
+++ b/dbms/tests/integration/test_cluster_copier/task0_description.xml
@@ -59,8 +59,6 @@
 
     <!-- Setting used to insert data -->
     <settings_push>
-        <!-- Remove this setting after superfluous deduplication after DROP PARTITION is fixed -->
-        <insert_deduplicate>0</insert_deduplicate>
     </settings_push>
 
     <!-- Tasks -->
diff --git a/dbms/tests/integration/test_cluster_copier/test.py b/dbms/tests/integration/test_cluster_copier/test.py
index 880ebd4e9ba..bf07b0263f4 100644
--- a/dbms/tests/integration/test_cluster_copier/test.py
+++ b/dbms/tests/integration/test_cluster_copier/test.py
@@ -14,7 +14,7 @@ sys.path.insert(0, os.path.dirname(CURRENT_TEST_DIR))
 from helpers.cluster import ClickHouseCluster
 from helpers.test_tools import TSV
 
-COPYING_FAIL_PROBABILITY = 0.5
+COPYING_FAIL_PROBABILITY = 0.33
 cluster = None
 
 @pytest.fixture(scope="module")
@@ -48,7 +48,7 @@ def started_cluster():
 
     finally:
         pass
-        #cluster.shutdown()
+        cluster.shutdown()
 
 
 def _test_copying(cmd_options):
@@ -105,6 +105,10 @@ def _test_copying(cmd_options):
     assert TSV(cluster.instances['s1_1_0'].query("SELECT DISTINCT d % 2 FROM hits")) == TSV("0\n")
 
     zk.delete(zk_task_path, recursive=True)
+    instance.query("DROP TABLE hits_all ON CLUSTER cluster1")
+    instance.query("DROP TABLE hits_all ON CLUSTER cluster1")
+    instance.query("DROP TABLE hits ON CLUSTER cluster0")
+    instance.query("DROP TABLE hits ON CLUSTER cluster1")
 
 
 def test_copy_simple(started_cluster):