diff --git a/pkg/parser/tests/base-grok-external-data/base-grok.yaml b/pkg/parser/tests/base-grok-external-data/base-grok.yaml
index 42ebf14a9..a484ab063 100644
--- a/pkg/parser/tests/base-grok-external-data/base-grok.yaml
+++ b/pkg/parser/tests/base-grok-external-data/base-grok.yaml
@@ -5,6 +5,7 @@ name: tests/base-grok
 data:
   - source_url: https://invalid.com/test.list
     dest_file: ./sample_strings.txt
+    type: string
 
 pattern_syntax:
   MYCAP_EXT: ".*"