fix tests

Author: MikhailBurdukov

src/Common/NamedCollections/NamedCollections.h

@@ -88,7 +88,7 @@ class NamedCollection
     NamedCollection(
         ImplPtr pimpl_,
         const std::string & collection_name,
-        const bool is_mutable_
+        bool is_mutable_
     );
 
     void assertMutable() const;
@@ -112,7 +112,7 @@ class NamedCollectionFromSQL final : public NamedCollection
     NamedCollection::SourceId getSourceId() const override { return SourceId::SQL; }
 
 private:
-    NamedCollectionFromSQL(const ASTCreateNamedCollectionQuery & query_);
+    explicit NamedCollectionFromSQL(const ASTCreateNamedCollectionQuery & query_);
 
     ASTCreateNamedCollectionQuery create_query_ptr;
 };

tests/integration/test_named_collections/test.py

@@ -794,6 +794,7 @@ def test_keeper_storage_remove_on_cluster(cluster, ignore, expected_raise):
         node.query(
             f"DROP NAMED COLLECTION test_nc ON CLUSTER `replicated_nc_nodes_cluster`"
         )
+    node.query("DROP NAMED COLLECTION IF EXISTS test_nc")
 
 
 @pytest.mark.parametrize(