diff --git a/src/cron/session-reaper.ts b/src/cron/session-reaper.ts
index be8cc835e2f..8de393931bd 100644
--- a/src/cron/session-reaper.ts
+++ b/src/cron/session-reaper.ts
@@ -36,7 +36,7 @@ export function resolveRetentionMs(cronConfig?: CronConfig): number | null {
   return DEFAULT_RETENTION_MS;
 }
 
-export type ReaperResult = {
+type ReaperResult = {
   swept: boolean;
   pruned: number;
 };
diff --git a/src/cron/session-target.ts b/src/cron/session-target.ts
index ecf2877bd3f..008d3f82cbe 100644
--- a/src/cron/session-target.ts
+++ b/src/cron/session-target.ts
@@ -1,4 +1,4 @@
-export const INVALID_CRON_SESSION_TARGET_ID_ERROR = "invalid cron sessionTarget session id";
+const INVALID_CRON_SESSION_TARGET_ID_ERROR = "invalid cron sessionTarget session id";
 
 export function isInvalidCronSessionTargetIdError(error: unknown): boolean {
   return error instanceof Error && error.message === INVALID_CRON_SESSION_TARGET_ID_ERROR;
diff --git a/src/cron/validate-timestamp.ts b/src/cron/validate-timestamp.ts
index a5ce5d1c3de..2e7ce1c13ab 100644
--- a/src/cron/validate-timestamp.ts
+++ b/src/cron/validate-timestamp.ts
@@ -5,16 +5,16 @@ import type { CronSchedule } from "./types.js";
 const ONE_MINUTE_MS = 60 * 1000;
 const TEN_YEARS_MS = 10 * 365.25 * 24 * 60 * 60 * 1000;
 
-export type TimestampValidationError = {
+type TimestampValidationError = {
   ok: false;
   message: string;
 };
 
-export type TimestampValidationSuccess = {
+type TimestampValidationSuccess = {
   ok: true;
 };
 
-export type TimestampValidationResult = TimestampValidationSuccess | TimestampValidationError;
+type TimestampValidationResult = TimestampValidationSuccess | TimestampValidationError;
 
 /**
  * Validates at timestamps in cron schedules.