Add check for UnknownSnapshotCopyRegionFault error

moto/redshift/exceptions.py

@@ -150,3 +150,10 @@ class InvalidParameterCombinationError(RedshiftClientError):
         super(InvalidParameterCombinationError, self).__init__(
             "InvalidParameterCombination", message
         )
+
+
+class UnknownSnapshotCopyRegionFaultError(RedshiftClientError):
+    def __init__(self, message):
+        super(UnknownSnapshotCopyRegionFaultError, self).__init__(
+            "UnknownSnapshotCopyRegionFault", message
+        )

moto/redshift/models.py

@@ -26,6 +26,7 @@ from .exceptions import (
     SnapshotCopyDisabledFaultError,
     SnapshotCopyGrantAlreadyExistsFaultError,
     SnapshotCopyGrantNotFoundFaultError,
+    UnknownSnapshotCopyRegionFaultError,
 )
 
 
@@ -577,6 +578,10 @@ class RedshiftBackend(BaseBackend):
                 raise InvalidParameterValueError(
                     "SnapshotCopyGrantName is required for Snapshot Copy on KMS encrypted clusters."
                 )
+            if kwargs["destination_region"] == self.region:
+                raise UnknownSnapshotCopyRegionFaultError(
+                    "Invalid region {}".format(self.region)
+                )
             status = {
                 "DestinationRegion": kwargs["destination_region"],
                 "RetentionPeriod": kwargs["retention_period"],