diff --git a/contrib/log/aliyun/aliyun_test.go b/contrib/log/aliyun/aliyun_test.go
index c4bfde480..e3e224ad4 100644
--- a/contrib/log/aliyun/aliyun_test.go
+++ b/contrib/log/aliyun/aliyun_test.go
@@ -116,21 +116,22 @@ func TestToString(t *testing.T) {
 		{"float64", 6.66, "6.66"},
 		{"max float64", math.MaxFloat64, "179769313486231570000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"}, //nolint:lll
 		{"float32", float32(6.66), "6.66"},
-		{"max float32", math.MaxFloat32, "340282346638528860000000000000000000000"},
-		{"int", int(math.MaxInt64), "9223372036854775807"},
+		{"max float32", float32(math.MaxFloat32), "340282350000000000000000000000000000000"},
+		{"int", math.MaxInt64, "9223372036854775807"},
 		{"uint", uint(math.MaxUint64), "18446744073709551615"},
-		{"int8", math.MaxInt8, "127"},
-		{"uint8", math.MaxUint8, "255"},
-		{"int16", math.MaxInt16, "32767"},
-		{"uint16", math.MaxUint16, "65535"},
-		{"int32", math.MaxInt32, "2147483647"},
-		{"uint32", math.MaxUint32, "4294967295"},
-		{"int64", math.MaxInt64, "9223372036854775807"},
+		{"int8", int8(math.MaxInt8), "127"},
+		{"uint8", uint8(math.MaxUint8), "255"},
+		{"int16", int16(math.MaxInt16), "32767"},
+		{"uint16", uint16(math.MaxUint16), "65535"},
+		{"int32", int32(math.MaxInt32), "2147483647"},
+		{"uint32", uint32(math.MaxUint32), "4294967295"},
+		{"int64", int64(math.MaxInt64), "9223372036854775807"},
 		{"uint64", uint64(math.MaxUint64), "18446744073709551615"},
 		{"string", "abc", "abc"},
 		{"bool", false, "false"},
 		{"[]byte", []byte("abc"), "abc"},
 		{"struct", struct{ Name string }{}, `{"Name":""}`},
+		{"nil", nil, ""},
 	}
 	for _, test := range tests {
 		t.Run(test.name, func(t *testing.T) {
diff --git a/contrib/log/tencent/tencent_test.go b/contrib/log/tencent/tencent_test.go
index 76bc13bdd..df1fe367c 100644
--- a/contrib/log/tencent/tencent_test.go
+++ b/contrib/log/tencent/tencent_test.go
@@ -120,21 +120,22 @@ func TestToString(t *testing.T) {
 		{"float64", 6.66, "6.66"},
 		{"max float64", math.MaxFloat64, "179769313486231570000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"}, //nolint:lll
 		{"float32", float32(6.66), "6.66"},
-		{"max float32", math.MaxFloat32, "340282346638528860000000000000000000000"},
-		{"int", int(math.MaxInt64), "9223372036854775807"},
+		{"max float32", float32(math.MaxFloat32), "340282350000000000000000000000000000000"},
+		{"int", math.MaxInt64, "9223372036854775807"},
 		{"uint", uint(math.MaxUint64), "18446744073709551615"},
-		{"int8", math.MaxInt8, "127"},
-		{"uint8", math.MaxUint8, "255"},
-		{"int16", math.MaxInt16, "32767"},
-		{"uint16", math.MaxUint16, "65535"},
-		{"int32", math.MaxInt32, "2147483647"},
-		{"uint32", math.MaxUint32, "4294967295"},
-		{"int64", math.MaxInt64, "9223372036854775807"},
+		{"int8", int8(math.MaxInt8), "127"},
+		{"uint8", uint8(math.MaxUint8), "255"},
+		{"int16", int16(math.MaxInt16), "32767"},
+		{"uint16", uint16(math.MaxUint16), "65535"},
+		{"int32", int32(math.MaxInt32), "2147483647"},
+		{"uint32", uint32(math.MaxUint32), "4294967295"},
+		{"int64", int64(math.MaxInt64), "9223372036854775807"},
 		{"uint64", uint64(math.MaxUint64), "18446744073709551615"},
 		{"string", "abc", "abc"},
 		{"bool", false, "false"},
 		{"[]byte", []byte("abc"), "abc"},
 		{"struct", struct{ Name string }{}, `{"Name":""}`},
+		{"nil", nil, ""},
 	}
 	for _, test := range tests {
 		t.Run(test.name, func(t *testing.T) {