diff --git a/blocks/test/fixtures/core-latestposts.html b/blocks/test/fixtures/core-latestposts.html
index ee48abd1b42766..c561a9daf9db59 100644
--- a/blocks/test/fixtures/core-latestposts.html
+++ b/blocks/test/fixtures/core-latestposts.html
@@ -1 +1 @@
-<!-- wp:core/latestposts poststoshow="5" /-->
+<!-- wp:core/latestposts poststoshow="5" displayPostDate="false" /-->
diff --git a/blocks/test/fixtures/core-latestposts.json b/blocks/test/fixtures/core-latestposts.json
index 515a6af9aee5ae..f74e98ddf240fb 100644
--- a/blocks/test/fixtures/core-latestposts.json
+++ b/blocks/test/fixtures/core-latestposts.json
@@ -3,7 +3,8 @@
         "uid": "_uid_0",
         "name": "core/latestposts",
         "attributes": {
-            "poststoshow": "5"
+            "poststoshow": "5",
+            "displayPostDate": "false"
         }
     }
 ]
diff --git a/blocks/test/fixtures/core-latestposts.serialized.html b/blocks/test/fixtures/core-latestposts.serialized.html
index ee48abd1b42766..c561a9daf9db59 100644
--- a/blocks/test/fixtures/core-latestposts.serialized.html
+++ b/blocks/test/fixtures/core-latestposts.serialized.html
@@ -1 +1 @@
-<!-- wp:core/latestposts poststoshow="5" /-->
+<!-- wp:core/latestposts poststoshow="5" displayPostDate="false" /-->