diff --git a/internal/proxy/multi_rate_limiter.go b/internal/proxy/multi_rate_limiter.go
index beb694bd75..d1cf2adae2 100644
--- a/internal/proxy/multi_rate_limiter.go
+++ b/internal/proxy/multi_rate_limiter.go
@@ -336,7 +336,7 @@ func (rl *rateLimiter) registerLimiters(globalLevel bool) {
 		rl.limiters.GetOrInsert(internalpb.RateType(rt), ratelimitutil.NewLimiter(limit, burst))
 		onEvent := func(rateType internalpb.RateType) func(*config.Event) {
 			return func(event *config.Event) {
-				f, err := strconv.ParseFloat(event.Value, 64)
+				f, err := strconv.ParseFloat(r.Formatter(event.Value), 64)
 				if err != nil {
 					log.Info("Error format for rateLimit",
 						zap.String("rateType", rateType.String()),
diff --git a/internal/proxy/multi_rate_limiter_test.go b/internal/proxy/multi_rate_limiter_test.go
index fee4dc2092..780b99a007 100644
--- a/internal/proxy/multi_rate_limiter_test.go
+++ b/internal/proxy/multi_rate_limiter_test.go
@@ -299,12 +299,19 @@ func TestRateLimiter(t *testing.T) {
 			Params.EtcdCfg.EtcdTLSCACert.GetValue(),
 			Params.EtcdCfg.EtcdTLSMinVersion.GetValue())
 
-		ctx, cancel := context.WithTimeout(context.Background(), time.Second)
-		defer cancel()
+		Params.Save(Params.QuotaConfig.DDLLimitEnabled.Key, "true")
+		defer Params.Reset(Params.QuotaConfig.DDLLimitEnabled.Key)
+		Params.Save(Params.QuotaConfig.DMLLimitEnabled.Key, "true")
+		defer Params.Reset(Params.QuotaConfig.DMLLimitEnabled.Key)
+		ctx := context.Background()
 		// avoid production precision issues when comparing 0-terminated numbers
 		newRate := fmt.Sprintf("%.2f1", rand.Float64())
+		etcdCli.KV.Put(ctx, "by-dev/config/quotaAndLimits/dml/insertRate/collection/max", "8")
+		defer etcdCli.KV.Delete(ctx, "by-dev/config/quotaAndLimits/dml/insertRate/collection/max")
 		etcdCli.KV.Put(ctx, "by-dev/config/quotaAndLimits/ddl/collectionRate", newRate)
+		defer etcdCli.KV.Delete(ctx, "by-dev/config/quotaAndLimits/ddl/collectionRate")
 		etcdCli.KV.Put(ctx, "by-dev/config/quotaAndLimits/ddl/partitionRate", "invalid")
+		defer etcdCli.KV.Delete(ctx, "by-dev/config/quotaAndLimits/ddl/partitionRate")
 
 		assert.Eventually(t, func() bool {
 			limit, _ := limiter.limiters.Get(internalpb.RateType_DDLCollection)
@@ -313,5 +320,8 @@ func TestRateLimiter(t *testing.T) {
 
 		limit, _ := limiter.limiters.Get(internalpb.RateType_DDLPartition)
 		assert.Equal(t, "+inf", limit.Limit().String())
+
+		limit, _ = limiter.limiters.Get(internalpb.RateType_DMLInsert)
+		assert.Equal(t, "8.388608e+06", limit.Limit().String())
 	})
 }