diff --git a/src/commands/sort.json b/src/commands/sort.json
index 5e117c950..d5f651114 100644
--- a/src/commands/sort.json
+++ b/src/commands/sort.json
@@ -150,7 +150,7 @@
                                 "type": "string"
                             },
                             {
-                                "description": "GET option is specified, but no object was found ",
+                                "description": "GET option is specified, but no object was found",
                                 "type": "null"
                             }
                         ]
diff --git a/src/commands/sort_ro.json b/src/commands/sort_ro.json
index 8b32b17fa..04cc3c841 100644
--- a/src/commands/sort_ro.json
+++ b/src/commands/sort_ro.json
@@ -117,7 +117,15 @@
             "description": "a list of sorted elements",
             "type": "array",
             "items": {
-                "type": "string"
+                "oneOf": [
+                    {
+                        "type": "string"
+                    },
+                    {
+                        "description": "GET option is specified, but no object was found",
+                        "type": "null"
+                    }
+                ]
             }
         }
     }
diff --git a/tests/unit/sort.tcl b/tests/unit/sort.tcl
index d4927cf84..109f6615e 100644
--- a/tests/unit/sort.tcl
+++ b/tests/unit/sort.tcl
@@ -75,12 +75,14 @@ start_server {
         assert_equal [lsort -integer $result] [r sort tosort GET #]
     } {} {cluster:skip}
 
-    test "SORT GET <const>" {
+foreach command {SORT SORT_RO} {
+    test "$command GET <const>" {
         r del foo
-        set res [r sort tosort GET foo]
+        set res [r $command tosort GET foo]
         assert_equal 16 [llength $res]
         foreach item $res { assert_equal {} $item }
     } {} {cluster:skip}
+}
 
     test "SORT GET (key and hash) with sanity check" {
         set l1 [r sort tosort GET # GET weight_*]