diff --git a/tests/integration/helpers/cluster.py b/tests/integration/helpers/cluster.py
index dfd964b04d2..96da7a57b60 100644
--- a/tests/integration/helpers/cluster.py
+++ b/tests/integration/helpers/cluster.py
@@ -3918,7 +3918,11 @@ class ClickHouseInstance:
         return None
 
     def restart_with_original_version(
-        self, stop_start_wait_sec=300, callback_onstop=None, signal=15
+        self,
+        stop_start_wait_sec=300,
+        callback_onstop=None,
+        signal=15,
+        clear_data_dir=False,
     ):
         begin_time = time.time()
         if not self.stay_alive:
@@ -3946,6 +3950,17 @@ class ClickHouseInstance:
 
         if callback_onstop:
             callback_onstop(self)
+
+        if clear_data_dir:
+            self.exec_in_container(
+                [
+                    "bash",
+                    "-c",
+                    "rm -rf /var/lib/clickhouse/metadata && rm -rf /var/lib/clickhouse/data",
+                ],
+                user="root",
+            )
+
         self.exec_in_container(
             [
                 "bash",
diff --git a/tests/integration/test_backward_compatibility/test_aggregate_function_state.py b/tests/integration/test_backward_compatibility/test_aggregate_function_state.py
index 3a936239cc8..7789d13be0b 100644
--- a/tests/integration/test_backward_compatibility/test_aggregate_function_state.py
+++ b/tests/integration/test_backward_compatibility/test_aggregate_function_state.py
@@ -35,6 +35,12 @@ def start_cluster():
         cluster.shutdown()
 
 
+@pytest.fixture(autouse=True)
+def cleanup():
+    yield
+    node1.restart_with_original_version(clear_data_dir=True)
+
+
 # We will test that serialization of internal state of "avg" function is compatible between different versions.
 # TODO Implement versioning of serialization format for aggregate function states.
 # NOTE This test is too ad-hoc.
@@ -143,7 +149,7 @@ def test_backward_compatability_for_uniq_exact(start_cluster, uniq_keys):
         == f"{uniq_keys}\n"
     )
 
-    node1.restart_with_latest_version()
+    node1.restart_with_latest_version(fix_metadata=True)
 
     assert (
         node1.query(f"SELECT uniqExactMerge(x) FROM state_{uniq_keys}")
@@ -216,7 +222,7 @@ def test_backward_compatability_for_uniq_exact_variadic(start_cluster, uniq_keys
         == f"{uniq_keys}\n"
     )
 
-    node1.restart_with_latest_version()
+    node1.restart_with_latest_version(fix_metadata=True)
 
     assert (
         node1.query(f"SELECT uniqExactMerge(x) FROM state_{uniq_keys}")