diff --git a/.buildkite/pipelines/on_merge.yml b/.buildkite/pipelines/on_merge.yml
index 5496ae8a1e800..b56c5fd9c6355 100644
--- a/.buildkite/pipelines/on_merge.yml
+++ b/.buildkite/pipelines/on_merge.yml
@@ -117,7 +117,6 @@ steps:
       provider: gcp
       machineType: n2-standard-4
       preemptible: true
-      diskSizeGb: 80
     timeout_in_minutes: 60
     retry:
       automatic:
diff --git a/.buildkite/pipelines/pull_request/base.yml b/.buildkite/pipelines/pull_request/base.yml
index 7618a56f9b9c3..ca7f28aea9ef6 100644
--- a/.buildkite/pipelines/pull_request/base.yml
+++ b/.buildkite/pipelines/pull_request/base.yml
@@ -79,7 +79,6 @@ steps:
     agents:
       machineType: n2-standard-4
       preemptible: true
-      diskSizeGb: 80
     key: check_oas_snapshot
     timeout_in_minutes: 60
     retry: