diff --git a/cluster.go b/cluster.go
index c6d8cc5..da55d7e 100644
--- a/cluster.go
+++ b/cluster.go
@@ -1212,7 +1212,7 @@ func (c *ClusterClient) pipelineReadCmds(
 			continue
 		}
 
-		if c.opt.ReadOnly && isLoadingError(err) {
+		if c.opt.ReadOnly && (isLoadingError(err) || !isRedisError(err)) {
 			node.MarkAsFailing()
 			return err
 		}