diff --git a/src/Storages/ObjectStorage/StorageObjectStorageSource.cpp b/src/Storages/ObjectStorage/StorageObjectStorageSource.cpp
index 07ef358d0396..85906ec18d48 100644
--- a/src/Storages/ObjectStorage/StorageObjectStorageSource.cpp
+++ b/src/Storages/ObjectStorage/StorageObjectStorageSource.cpp
@@ -50,6 +50,7 @@
 #include <fmt/ranges.h>
 #include <Common/ProfileEvents.h>
 #include <Core/SettingsEnums.h>
+#include <Poco/String.h>
 
 namespace fs = std::filesystem;
 namespace ProfileEvents
@@ -889,7 +890,7 @@ StorageObjectStorageSource::ReaderHolder StorageObjectStorageSource::createReade
 
         InputFormatPtr input_format;
         if (context_->getSettingsRef()[Setting::use_parquet_metadata_cache] && use_native_reader_v3
-            && (object_info->getFileFormat().value_or(configuration->getFormat()) == "Parquet")
+            && (Poco::toLower(object_info->getFileFormat().value_or(configuration->getFormat())) == "parquet")
             && !object_info->getObjectMetadata()->etag.empty())
         {
             std::optional<RelativePathWithMetadata> object_with_metadata = object_info->relative_path_with_metadata;
diff --git a/tests/integration/test_storage_iceberg_with_spark_cache/test_filesystem_cache.py b/tests/integration/test_storage_iceberg_with_spark_cache/test_filesystem_cache.py
index 5d716f66e8c7..cd8227919dba 100644
--- a/tests/integration/test_storage_iceberg_with_spark_cache/test_filesystem_cache.py
+++ b/tests/integration/test_storage_iceberg_with_spark_cache/test_filesystem_cache.py
@@ -63,6 +63,7 @@ def test_filesystem_cache(started_cluster_iceberg_with_spark, storage_type):
     instance.query(
         f"SELECT * FROM {TABLE_NAME} SETTINGS filesystem_cache_name = 'cache1'",
         query_id=query_id,
+        settings={"use_parquet_metadata_cache": "0"}
     )
 
     instance.query("SYSTEM FLUSH LOGS")