diff --git a/integration/sheepdog/src/lib.rs b/integration/sheepdog/src/lib.rs
index ba1597bd7..51dce494c 100644
--- a/integration/sheepdog/src/lib.rs
+++ b/integration/sheepdog/src/lib.rs
@@ -241,6 +241,7 @@ generator:
           post:
             maximum_prebuild_cache_size_bytes: "8 Mb"
             variant: "apache_common"
+            block_cache_method: Fixed
         "#,
         )?;
 
@@ -276,6 +277,7 @@ generator:
           post:
             maximum_prebuild_cache_size_bytes: "8 Mb"
             variant: "ascii"
+            block_cache_method: Fixed
         "#,
         )?;