diff --git a/quickwit/rest-api-tests/scenarii/es_compatibility/0021-cat-indices.yaml b/quickwit/rest-api-tests/scenarii/es_compatibility/0021-cat-indices.yaml
index 813b577bca4..c5c0e9ae809 100644
--- a/quickwit/rest-api-tests/scenarii/es_compatibility/0021-cat-indices.yaml
+++ b/quickwit/rest-api-tests/scenarii/es_compatibility/0021-cat-indices.yaml
@@ -11,10 +11,14 @@ expected:
   health: green
   index: gharchive
   pri: '1'
-  pri.store.size: 272.4kb
+  pri.store.size:
+      $expect: 270 < float(val[:-2]) < 280
   rep: '1'
   status: open
-  store.size: 272.4kb
+  store.size:
+      #272.4kb
+      $expect: 270 < float(val[:-2]) < 280
+  rep: '1'
   #uuid: gharchive:01HN2SDANHDN6WFAFNH7BBMQ8C
 - index: otel-logs-v0_7
   docs.count: '0'
@@ -26,16 +30,22 @@ engines:
   - quickwit
 endpoint: "_cat/indices/gharchive?format=json"
 expected:
-- dataset.size: 222.8kb
+- dataset.size:
+    # 222.8kb
+    $expect: 220 < float(val[:-2]) < 230
   docs.count: '100'
   docs.deleted: '0'
   health: green
   index: gharchive
   pri: '1'
-  pri.store.size: 272.4kb
+  pri.store.size:
+      #272.4kb
+      $expect: 270 < float(val[:-2]) < 280
   rep: '1'
   status: open
-  store.size: 272.4kb
+  store.size:
+      # 272.4kb
+      $expect: 270 < float(val[:-2]) < 280
   #uuid: gharchive:01HN2SDANHDN6WFAFNH7BBMQ8C
 ---
 method: [GET]