Cloudformation AWS::EC2::Instance calling cross stack exported GroupId

instance snippet

 myInstance:
    Type: AWS::EC2::Instance
    Properties:
      ImageId:
        Fn::FindInMap:
        - RegionMap
        - Ref: AWS::Region
        - AMI
      InstanceType: t1.micro
      KeyName:
        Ref: KeyPair
      SecurityGroupIds: [ !ImportValue TESTY22-SecurityGroupID ]
      Tags:
      - Key: Name
        Value: myInstanceName