diff --git a/src/tests/sqlsmith/src/validation.rs b/src/tests/sqlsmith/src/validation.rs
index 4ee51af361e78..c7e39bf33d548 100644
--- a/src/tests/sqlsmith/src/validation.rs
+++ b/src/tests/sqlsmith/src/validation.rs
@@ -36,6 +36,13 @@ fn not_unique_error(db_error: &str) -> bool {
     db_error.contains("Bind error") && db_error.contains("is not unique")
 }
 
+fn is_unsupported_timestamp_error(db_error: &str) -> bool {
+    db_error.contains("Unsupported function: Timestamptz cmp Date")
+        || db_error.contains("Unsupported function: Date cmp Timestamptz ")
+        || db_error.contains("Unsupported function: Timestamp cmp Timestamptz")
+        || db_error.contains("Unsupported function: Timestamptz cmp Timestamp")
+}
+
 /// Certain errors are permitted to occur. This is because:
 /// 1. It is more complex to generate queries without these errors.
 /// 2. These errors seldom occur, skipping them won't affect overall effectiveness of sqlsmith.
@@ -44,4 +51,5 @@ pub fn is_permissible_error(db_error: &str) -> bool {
         || is_division_by_zero_err(db_error)
         || is_unimplemented_error(db_error)
         || not_unique_error(db_error)
+        || is_unsupported_timestamp_error(db_error)
 }