Shouldly.ShouldAssertException : getAttributesResponse.Attributes should contain key "RawMessageDelivery" with value "true" but value was "True"

Shouldly.ShouldAssertException : await Sns.GetSubscriptionAttributesAsync(new GetSubscriptionAttributesRequest { SubscriptionArn = subscribeResponse.SubscriptionArn }, TestContext.Current.CancellationToken); getAttributesResponse.Attributes should contain key "RawMessageDelivery" with value "true" but value was "True"

Process completed with exit code 1.