diff --git a/ydb/tests/olap/load/lib/external.py b/ydb/tests/olap/load/lib/external.py
index 6a224925cd18..14d2a0e9f6ba 100644
--- a/ydb/tests/olap/load/lib/external.py
+++ b/ydb/tests/olap/load/lib/external.py
@@ -53,3 +53,7 @@ class TestExternalX1(ExternalSuiteBase):
 
 class TestExternalM1(ExternalSuiteBase):
     external_folder: str = 'm1'
+
+
+class TestExternalB1(ExternalSuiteBase):
+    external_folder: str = 'b1'