diff --git a/tests/clickhouse-test b/tests/clickhouse-test
index 006cc71bb4c..b596ac2a5fc 100755
--- a/tests/clickhouse-test
+++ b/tests/clickhouse-test
@@ -555,12 +555,12 @@ class SettingsRandomizer:
         "prefer_localhost_replica": lambda: random.randint(0, 1),
         "max_block_size": lambda: random.randint(8000, 100000),
         "max_threads": lambda: random.randint(1, 64),
-        "optimize_append_index": lambda: random.randint(1, 1),
-        "optimize_if_chain_to_multiif": lambda: random.randint(1, 1),
-        "optimize_if_transform_strings_to_enum": lambda: random.randint(1, 1),
+        "optimize_append_index": lambda: random.randint(0, 1),
+        "optimize_if_chain_to_multiif": lambda: random.randint(0, 1),
+        "optimize_if_transform_strings_to_enum": lambda: random.randint(0, 1),
         "optimize_read_in_order": lambda: random.randint(0, 1),
-        "optimize_or_like_chain": lambda: random.randint(1, 1),
-        "optimize_substitute_columns": lambda: random.randint(1, 1),
+        "optimize_or_like_chain": lambda: random.randint(0, 1),
+        "optimize_substitute_columns": lambda: random.randint(0, 1),
         "enable_multiple_prewhere_read_steps": lambda: random.randint(0, 1),
         "read_in_order_two_level_merge_threshold": lambda: random.randint(0, 100),
         "optimize_aggregation_in_order": lambda: random.randint(0, 1),