diff --git a/x-pack/plugin/core/src/test/java/org/elasticsearch/xpack/core/ml/calendars/ScheduledEventTests.java b/x-pack/plugin/core/src/test/java/org/elasticsearch/xpack/core/ml/calendars/ScheduledEventTests.java
index 891430057513e..21fadee4e78a8 100644
--- a/x-pack/plugin/core/src/test/java/org/elasticsearch/xpack/core/ml/calendars/ScheduledEventTests.java
+++ b/x-pack/plugin/core/src/test/java/org/elasticsearch/xpack/core/ml/calendars/ScheduledEventTests.java
@@ -207,7 +207,7 @@ private void validateScheduledEventSuccessfulBuild(
         String description = randomAlphaOfLength(10);
         String calendarId = randomAlphaOfLength(10);
         Instant startTime = Instant.ofEpochMilli(Instant.now().toEpochMilli());
-        Instant endTime = startTime.plusSeconds(randomInt(3600));
+        Instant endTime = startTime.plusSeconds(randomIntBetween(1, 3600));
 
         ScheduledEvent.Builder builder = new ScheduledEvent.Builder().description(description)
             .calendarId(calendarId)