diff --git a/tests/unit/type/zset.tcl b/tests/unit/type/zset.tcl
index cc560143..82f76bef 100644
--- a/tests/unit/type/zset.tcl
+++ b/tests/unit/type/zset.tcl
@@ -290,6 +290,12 @@ start_server {tags {"zset"}} {
             assert_equal  6 [r zscore zset bar]
         }
 
+        test "ZINCRBY return value" {
+            r del ztmp
+            set retval [r zincrby ztmp 1.0 x]
+            assert {$retval == 1.0}
+        }
+
         proc create_default_zset {} {
             create_zset zset {-inf a 1 b 2 c 3 d 4 e 5 f +inf g}
         }