diff --git a/server/src/test/java/org/elasticsearch/common/time/DateFormattersTests.java b/server/src/test/java/org/elasticsearch/common/time/DateFormattersTests.java
index ec94018223693..6a263b7db4215 100644
--- a/server/src/test/java/org/elasticsearch/common/time/DateFormattersTests.java
+++ b/server/src/test/java/org/elasticsearch/common/time/DateFormattersTests.java
@@ -175,8 +175,9 @@ public void testEqualsAndHashcode() {
         assertThat(DateFormatters.forPattern("YYYY").withZone(ZoneId.of("CET")), not(equalTo(DateFormatters.forPattern("YYYY"))));
 
         // different locale, thus not equals
-        assertThat(DateFormatters.forPattern("YYYY").withLocale(randomLocale(random())),
-            not(equalTo(DateFormatters.forPattern("YYYY"))));
+        DateFormatter f1 = DateFormatters.forPattern("YYYY").withLocale(Locale.CANADA);
+        DateFormatter f2 = f1.withLocale(Locale.FRENCH);
+        assertThat(f1, not(equalTo(f2)));
 
         // different pattern, thus not equals
         assertThat(DateFormatters.forPattern("YYYY"), not(equalTo(DateFormatters.forPattern("YY"))));