diff --git a/tests/integration/test_materialized_mysql_database/materialized_with_ddl.py b/tests/integration/test_materialized_mysql_database/materialized_with_ddl.py
index 8b2943c2b733..389d430622d2 100644
--- a/tests/integration/test_materialized_mysql_database/materialized_with_ddl.py
+++ b/tests/integration/test_materialized_mysql_database/materialized_with_ddl.py
@@ -13,25 +13,36 @@
 from helpers.test_tools import assert_eq_with_retry
 
 
-def check_query(clickhouse_node, query, result_set, retry_count=10, interval_seconds=3):
-    lastest_result = ""
+def check_query(
+    clickhouse_node,
+    query,
+    result_set,
+    retry_count=30,
+    interval_seconds=1,
+    on_failure=None,
+):
+    latest_result = ""
 
+    if "/* expect: " not in query:
+        query = "/* expect: " + result_set.rstrip("\n") + "*/ " + query
     for i in range(retry_count):
         try:
-            lastest_result = clickhouse_node.query(query)
-            if result_set == lastest_result:
+            latest_result = clickhouse_node.query(query)
+            if result_set == latest_result:
                 return
 
-            logging.debug(f"latest_result {lastest_result}")
+            logging.debug(f"latest_result {latest_result}")
             time.sleep(interval_seconds)
         except Exception as e:
             logging.debug(f"check_query retry {i+1} exception {e}")
             time.sleep(interval_seconds)
     else:
-        result_got = clickhouse_node.query(query)
+        latest_result = clickhouse_node.query(query)
+        if on_failure is not None and latest_result != result_set:
+            on_failure(latest_result, result_set)
         assert (
-            result_got == result_set
-        ), f"Got result {result_got}, while expected result {result_set}"
+            latest_result == result_set
+        ), f"Got result '{latest_result}', expected result '{result_set}'"
 
 
 def dml_with_materialized_mysql_database(clickhouse_node, mysql_node, service_name):
diff --git a/tests/integration/test_materialized_mysql_database/test.py b/tests/integration/test_materialized_mysql_database/test.py
index c21e04af8dbf..1fd09f733f0b 100644
--- a/tests/integration/test_materialized_mysql_database/test.py
+++ b/tests/integration/test_materialized_mysql_database/test.py
@@ -52,6 +52,7 @@ def started_cluster():
         cluster.start()
         yield cluster
     finally:
+        node_db.stop_clickhouse()  # ensures that coverage report is written to disk, even if cluster.shutdown() times out.
         cluster.shutdown()
 
 
@@ -86,7 +87,7 @@ def alloc_connection(self):
                 else:
                     self.mysql_connection.ping(reconnect=True)
                 logging.debug(
-                    "MySQL Connection establised: {}:{}".format(
+                    "MySQL Connection established: {}:{}".format(
                         self.ip_address, self.port
                     )
                 )
@@ -94,7 +95,7 @@ def alloc_connection(self):
             except Exception as e:
                 errors += [str(e)]
                 time.sleep(1)
-        raise Exception("Connection not establised, {}".format(errors))
+        raise Exception("Connection not established, {}".format(errors))
 
     def query(self, execution_query):
         with self.alloc_connection().cursor() as cursor:
@@ -118,9 +119,9 @@ def result(self, execution_query):
             if result is not None:
                 print(cursor.fetchall())
 
-    def query_and_get_data(self, executio_query):
+    def query_and_get_data(self, execution_query):
         with self.alloc_connection().cursor() as cursor:
-            cursor.execute(executio_query)
+            cursor.execute(execution_query)
             return cursor.fetchall()
 
     def close(self):