diff --git a/server/service/schedule/schedule_test.go b/server/service/schedule/schedule_test.go
index 5b41e46cd0..c1b05e2023 100644
--- a/server/service/schedule/schedule_test.go
+++ b/server/service/schedule/schedule_test.go
@@ -650,6 +650,7 @@ func TestTriggerMultipleInstances(t *testing.T) {
 	}
 
 	for _, c := range cases {
+		c := c
 		ctx, cancelFunc := context.WithCancel(context.Background())
 
 		instanceIDs := strings.Split("abcdef", "")