diff --git a/promql/testdata/operators.test b/promql/testdata/operators.test
index 82806fc48..ccb019c59 100644
--- a/promql/testdata/operators.test
+++ b/promql/testdata/operators.test
@@ -115,6 +115,17 @@ eval instant at 50m http_requests{group="canary"} / on(instance,job) http_reques
 	{instance="1", job="api-server"} 2 
 	{instance="1", job="app-server"} 1.3333333333333333 
 
+# https://github.com/prometheus/prometheus/issues/1489
+eval instant at 50m http_requests AND ON (dummy) vector(1)
+	http_requests{group="canary", instance="0", job="api-server"} 300 
+	http_requests{group="canary", instance="0", job="app-server"} 700 
+	http_requests{group="canary", instance="1", job="api-server"} 400 
+	http_requests{group="canary", instance="1", job="app-server"} 800 
+	http_requests{group="production", instance="0", job="api-server"} 100 
+	http_requests{group="production", instance="0", job="app-server"} 500 
+	http_requests{group="production", instance="1", job="api-server"} 200 
+	http_requests{group="production", instance="1", job="app-server"} 600 
+
 
 # Comparisons.
 eval instant at 50m SUM(http_requests) BY (job) > 1000