diff --git a/firebase-firestore/src/androidTest/java/com/google/firebase/firestore/ServerTimestampTest.java b/firebase-firestore/src/androidTest/java/com/google/firebase/firestore/ServerTimestampTest.java
index fb38935ddc2..3bdb2f082ee 100644
--- a/firebase-firestore/src/androidTest/java/com/google/firebase/firestore/ServerTimestampTest.java
+++ b/firebase-firestore/src/androidTest/java/com/google/firebase/firestore/ServerTimestampTest.java
@@ -363,7 +363,7 @@ public void testPOJOWithWrongType() {
     } catch (IllegalArgumentException e) {
       assertEquals(
           "Field timestamp is annotated with @ServerTimestamp but is class "
-              + "java.lang.String instead of Date or Timestamp.",
+              + "java.lang.String instead of Date, Timestamp, or Instant.",
           e.getMessage());
     }
   }