diff --git a/server/api/region_test.go b/server/api/region_test.go
index f13f84551203..e6878399a1ce 100644
--- a/server/api/region_test.go
+++ b/server/api/region_test.go
@@ -464,7 +464,7 @@ func TestRegionsWithKillRequest(t *testing.T) {
 	addr := svr.GetAddr()
 	url := fmt.Sprintf("%s%s/api/v1/regions", addr, apiPrefix)
 	mustBootstrapCluster(re, svr)
-	regionCount := 200000
+	regionCount := 50000
 	for i := 0; i < regionCount; i++ {
 		r := core.NewTestRegionInfo(uint64(i+2), 1,
 			[]byte(fmt.Sprintf("%09d", i)),
@@ -483,8 +483,8 @@ func TestRegionsWithKillRequest(t *testing.T) {
 		re.Contains(err.Error(), "context canceled")
 		respCh <- resp
 	}()
-	time.Sleep(200 * time.Millisecond) // wait for the request to be sent
-	cancel()                           // close the request
+	time.Sleep(50 * time.Millisecond) // wait for the request to be sent
+	cancel()                          // close the request
 	resp := <-respCh
 	re.Nil(resp)
 }