diff --git a/README.md b/README.md
index 4998c0a..9e86053 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,6 @@
 [![PkgGoDev](https://pkg.go.dev/badge/github.com/shockerli/cvt)](https://pkg.go.dev/github.com/shockerli/cvt)
 [![Go Report Card](https://goreportcard.com/badge/github.com/shockerli/cvt)](https://goreportcard.com/report/github.com/shockerli/cvt)
 [![Build Status](https://travis-ci.com/shockerli/cvt.svg?branch=master)](https://travis-ci.com/shockerli/cvt)
-![GitHub top language](https://img.shields.io/github/languages/top/shockerli/cvt)
 [![codecov](https://codecov.io/gh/shockerli/cvt/branch/master/graph/badge.svg)](https://codecov.io/gh/shockerli/cvt)
 ![GitHub](https://img.shields.io/github/license/shockerli/cvt)
 [![Mentioned in Awesome Go](https://awesome.re/mentioned-badge.svg)](https://github.com/avelino/awesome-go)
diff --git a/README_ZH.md b/README_ZH.md
index 03d12e7..873d6ad 100644
--- a/README_ZH.md
+++ b/README_ZH.md
@@ -3,7 +3,6 @@
 [![PkgGoDev](https://pkg.go.dev/badge/github.com/shockerli/cvt)](https://pkg.go.dev/github.com/shockerli/cvt)
 [![Go Report Card](https://goreportcard.com/badge/github.com/shockerli/cvt)](https://goreportcard.com/report/github.com/shockerli/cvt)
 [![Build Status](https://travis-ci.com/shockerli/cvt.svg?branch=master)](https://travis-ci.com/shockerli/cvt)
-![GitHub top language](https://img.shields.io/github/languages/top/shockerli/cvt)
 [![codecov](https://codecov.io/gh/shockerli/cvt/branch/master/graph/badge.svg)](https://codecov.io/gh/shockerli/cvt)
 ![GitHub](https://img.shields.io/github/license/shockerli/cvt)
 [![Mentioned in Awesome Go](https://awesome.re/mentioned-badge.svg)](https://github.com/avelino/awesome-go)
diff --git a/int_test.go b/int_test.go
index a0d8214..c1be868 100644
--- a/int_test.go
+++ b/int_test.go
@@ -977,6 +977,8 @@ func TestUint64E(t *testing.T) {
 		{"8", 8, false},
 		{"8.00", 8, false},
 		{"8.01", 8, false},
+		{"00100", 100, false},
+		{"00100.01", 100, false},
 		{[]byte("8"), 8, false},
 		{[]byte("8.00"), 8, false},
 		{[]byte("8.01"), 8, false},
@@ -1098,6 +1100,8 @@ func TestUint32E(t *testing.T) {
 		{"8", 8, false},
 		{"8.00", 8, false},
 		{"8.01", 8, false},
+		{"00100", 100, false},
+		{"00100.01", 100, false},
 		{nil, 0, false},
 		{aliasTypeInt0, 0, false},
 		{&aliasTypeInt0, 0, false},
@@ -1212,6 +1216,8 @@ func TestUint16E(t *testing.T) {
 		{"8", 8, false},
 		{"8.00", 8, false},
 		{"8.01", 8, false},
+		{"00100", 100, false},
+		{"00100.01", 100, false},
 		{nil, 0, false},
 		{aliasTypeInt0, 0, false},
 		{&aliasTypeInt0, 0, false},
@@ -1328,6 +1334,8 @@ func TestUint8E(t *testing.T) {
 		{"8", 8, false},
 		{"8.00", 8, false},
 		{"8.01", 8, false},
+		{"00100", 100, false},
+		{"00100.01", 100, false},
 		{nil, 0, false},
 		{aliasTypeInt0, 0, false},
 		{&aliasTypeInt0, 0, false},
@@ -1444,6 +1452,8 @@ func TestUintE(t *testing.T) {
 		{"8", 8, false},
 		{"8.00", 8, false},
 		{"8.01", 8, false},
+		{"00100", 100, false},
+		{"00100.01", 100, false},
 		{uint64(math.MaxUint32), uint(math.MaxUint32), false},
 		{uint32(math.MaxUint32), uint(math.MaxUint32), false},
 		{nil, 0, false},
@@ -1567,11 +1577,17 @@ func TestInt64E(t *testing.T) {
 		{"8", 8, false},
 		{"8.00", 8, false},
 		{"8.01", 8, false},
+		{"00100", 100, false},
+		{"-00100", -100, false},
+		{"00100.00", 100, false},
+		{"-00100.01", -100, false},
 		{[]byte("-8"), -8, false},
 		{[]byte("-8.01"), -8, false},
 		{[]byte("8"), 8, false},
 		{[]byte("8.00"), 8, false},
 		{[]byte("8.01"), 8, false},
+		{math.MaxInt64, math.MaxInt64, false},
+		{math.MinInt64, math.MinInt64, false},
 		{uint32(math.MaxUint32), int64(math.MaxUint32), false},
 		{nil, 0, false},
 		{aliasTypeInt0, 0, false},
@@ -1689,12 +1705,17 @@ func TestInt32E(t *testing.T) {
 		{"8", 8, false},
 		{"8.00", 8, false},
 		{"8.01", 8, false},
+		{"00100", 100, false},
+		{"-00100", -100, false},
+		{"00100.00", 100, false},
+		{"-00100.01", -100, false},
 		{[]byte("-8"), -8, false},
 		{[]byte("-8.01"), -8, false},
 		{[]byte("8"), 8, false},
 		{[]byte("8.00"), 8, false},
 		{[]byte("8.01"), 8, false},
 		{math.MaxInt32, int32(math.MaxInt32), false},
+		{math.MinInt32, int32(math.MinInt32), false},
 		{nil, 0, false},
 		{aliasTypeInt0, 0, false},
 		{&aliasTypeInt0, 0, false},
@@ -1808,12 +1829,17 @@ func TestInt16E(t *testing.T) {
 		{"8", 8, false},
 		{"8.00", 8, false},
 		{"8.01", 8, false},
+		{"00100", 100, false},
+		{"-00100", -100, false},
+		{"00100.00", 100, false},
+		{"-00100.01", -100, false},
 		{[]byte("-8"), -8, false},
 		{[]byte("-8.01"), -8, false},
 		{[]byte("8"), 8, false},
 		{[]byte("8.00"), 8, false},
 		{[]byte("8.01"), 8, false},
 		{math.MaxInt16, int16(math.MaxInt16), false},
+		{math.MinInt16, int16(math.MinInt16), false},
 		{nil, 0, false},
 		{aliasTypeInt0, 0, false},
 		{&aliasTypeInt0, 0, false},
@@ -1929,12 +1955,17 @@ func TestInt8E(t *testing.T) {
 		{"8", 8, false},
 		{"8.00", 8, false},
 		{"8.01", 8, false},
+		{"00100", 100, false},
+		{"-00100", -100, false},
+		{"00100.00", 100, false},
+		{"-00100.01", -100, false},
 		{[]byte("-8"), -8, false},
 		{[]byte("-8.01"), -8, false},
 		{[]byte("8"), 8, false},
 		{[]byte("8.00"), 8, false},
 		{[]byte("8.01"), 8, false},
 		{int8(math.MaxInt8), math.MaxInt8, false},
+		{int8(math.MinInt8), math.MinInt8, false},
 		{nil, 0, false},
 		{aliasTypeInt0, 0, false},
 		{&aliasTypeInt0, 0, false},
@@ -2051,12 +2082,16 @@ func TestIntE(t *testing.T) {
 		{"8", 8, false},
 		{"8.00", 8, false},
 		{"8.01", 8, false},
+		{"00100", 100, false},
+		{"-00100", -100, false},
+		{"00100.00", 100, false},
+		{"-00100.01", -100, false},
 		{[]byte("-8"), -8, false},
 		{[]byte("-8.01"), -8, false},
 		{[]byte("8"), 8, false},
 		{[]byte("8.00"), 8, false},
 		{[]byte("8.01"), 8, false},
-		{int(math.MaxInt32), int(math.MaxInt32), false},
+		{math.MaxInt32, math.MaxInt32, false},
 		{nil, 0, false},
 		{aliasTypeInt0, 0, false},
 		{&aliasTypeInt0, 0, false},