diff --git a/packages/core/metrics/core-metrics-collectors-server-internal/src/mocks_internal.ts b/packages/core/metrics/core-metrics-collectors-server-internal/src/mocks_internal.ts
index 812b2c89ff8d4..d8659d702d0c8 100644
--- a/packages/core/metrics/core-metrics-collectors-server-internal/src/mocks_internal.ts
+++ b/packages/core/metrics/core-metrics-collectors-server-internal/src/mocks_internal.ts
@@ -37,6 +37,8 @@ function createMockOpsProcessMetrics(): OpsProcessMetrics {
     memory: {
       heap: { total_in_bytes: 1, used_in_bytes: 1, size_limit: 1 },
       resident_set_size_in_bytes: 1,
+      array_buffers_in_bytes: 1,
+      external_in_bytes: 1,
     },
     event_loop_delay: 1,
     event_loop_delay_histogram: histogram,