diff --git a/src/test_data.py b/src/test_data.py
index 5418d1799b..a56cc45f07 100644
--- a/src/test_data.py
+++ b/src/test_data.py
@@ -352,6 +352,8 @@ METRICS_WITH_INITIAL_VALUE_ZERO = [
     "waku_histogram_message_size_sum",
     "waku_histogram_message_size_count",
     'waku_histogram_message_size_bucket{le="0.0"}',
+    'waku_histogram_message_size_bucket{le="1.0"}',
+    'waku_histogram_message_size_bucket{le="3.0"}',
     'waku_histogram_message_size_bucket{le="5.0"}',
     'waku_histogram_message_size_bucket{le="15.0"}',
     'waku_histogram_message_size_bucket{le="50.0"}',
@@ -359,7 +361,7 @@ METRICS_WITH_INITIAL_VALUE_ZERO = [
     'waku_histogram_message_size_bucket{le="100.0"}',
     'waku_histogram_message_size_bucket{le="125.0"}',
     'waku_histogram_message_size_bucket{le="150.0"}',
-    'waku_histogram_message_size_bucket{le="300.0"}',
+    'waku_histogram_message_size_bucket{le="500.0"}',
     'waku_histogram_message_size_bucket{le="700.0"}',
     'waku_histogram_message_size_bucket{le="1000.0"}',
     'waku_histogram_message_size_bucket{le="+Inf"}',