diff --git a/cassandra/cluster.py b/cassandra/cluster.py
index 1181c6f686..db9eedf212 100644
--- a/cassandra/cluster.py
+++ b/cassandra/cluster.py
@@ -3482,6 +3482,11 @@ def wait_for_schema_agreement(self, wait_time: Optional[float] = None,
         if wait_time is not None and wait_time <= 0:
             raise ValueError("wait_time must be greater than 0")
 
+        if scope not in (SchemaAgreementScope.RACK, SchemaAgreementScope.DC, SchemaAgreementScope.CLUSTER):
+            raise ValueError(
+                "scope must be SchemaAgreementScope.RACK, .DC, or .CLUSTER"
+            )
+
         total_timeout = wait_time if wait_time is not None else self.cluster.max_schema_agreement_wait
         if total_timeout <= 0:
             raise ValueError("total_timeout must be greater than 0")