diff --git a/client/http/types_test.go b/client/http/types_test.go
index 74482e29c3c..1dedbdc7d3b 100644
--- a/client/http/types_test.go
+++ b/client/http/types_test.go
@@ -46,7 +46,7 @@ func TestMergeRegionsInfo(t *testing.T) {
 	regionsInfo := regionsInfo1.Merge(regionsInfo2)
 	re.Equal(int64(2), regionsInfo.Count)
 	re.Equal(2, len(regionsInfo.Regions))
-	re.Equal(append(regionsInfo1.Regions, regionsInfo2.Regions...), regionsInfo.Regions)
+	re.Subset(regionsInfo.Regions, append(regionsInfo1.Regions, regionsInfo2.Regions...))
 }
 
 func TestRuleStartEndKey(t *testing.T) {