diff --git a/envutil/envutil_test.go b/envutil/envutil_test.go
index bbe91f06c..014e1b486 100644
--- a/envutil/envutil_test.go
+++ b/envutil/envutil_test.go
@@ -3,6 +3,7 @@ package envutil
 import (
 	"testing"
 
+	"github.com/gookit/goutil/maputil"
 	"github.com/gookit/goutil/testutil"
 	"github.com/gookit/goutil/testutil/assert"
 )
@@ -63,3 +64,36 @@ func TestParseEnvValue(t *testing.T) {
 		is.Eq("abc/def_val", ParseEnvValue(rVal))
 	})
 }
+
+func TestSetEnvs(t *testing.T) {
+	envMp := map[string]string{
+		"FirstEnv":  "abc",
+		"SecondEnv": "def",
+	}
+	keys := maputil.Keys(envMp)
+	for key := range envMp {
+		assert.Empty(t, Getenv(key))
+	}
+
+	// SetEnvs
+	SetEnvs(maputil.SMap(envMp).ToKVPairs()...)
+	for key, val := range envMp {
+		assert.Eq(t, val, Getenv(key))
+	}
+
+	UnsetEnvs(keys...)
+	for key := range envMp {
+		assert.Empty(t, Getenv(key))
+	}
+
+	// SetEnvMap
+	SetEnvMap(envMp)
+	for key, val := range envMp {
+		assert.Eq(t, val, Getenv(key))
+	}
+
+	UnsetEnvs(keys...)
+	for key := range envMp {
+		assert.Empty(t, Getenv(key))
+	}
+}
diff --git a/maputil/smap.go b/maputil/smap.go
index d38598214..47c9ad991 100644
--- a/maputil/smap.go
+++ b/maputil/smap.go
@@ -111,6 +111,15 @@ func (m SMap) Values() []string {
 	return ss
 }
 
+// ToKVPairs slice convert. eg: {k1:v1,k2:v2} => {k1,v1,k2,v2}
+func (m SMap) ToKVPairs() []string {
+	pairs := make([]string, 0, len(m)*2)
+	for k, v := range m {
+		pairs = append(pairs, k, v)
+	}
+	return pairs
+}
+
 // String data to string
 func (m SMap) String() string {
 	return ToString2(m)
diff --git a/maputil/smap_test.go b/maputil/smap_test.go
index ac7761813..bc6b3c4fb 100644
--- a/maputil/smap_test.go
+++ b/maputil/smap_test.go
@@ -1,6 +1,7 @@
 package maputil_test
 
 import (
+	"fmt"
 	"testing"
 
 	"github.com/gookit/goutil/maputil"
@@ -47,3 +48,15 @@ func TestSMap_usage(t *testing.T) {
 	assert.Eq(t, "", mp.Str("notExists"))
 	assert.Empty(t, mp.Ints("notExists"))
 }
+
+func TestSMap_ToKVPairs(t *testing.T) {
+	mp := maputil.SMap{
+		"k1": "23",
+		"k2": "ab",
+	}
+	arr := mp.ToKVPairs()
+	assert.Len(t, arr, 4)
+	str := fmt.Sprint(arr)
+	assert.StrContains(t, str, "k1 23")
+	assert.StrContains(t, str, "k2 ab")
+}
diff --git a/sysutil/sysenv_test.go b/sysutil/sysenv_test.go
index 35c25beaf..10738e2d9 100644
--- a/sysutil/sysenv_test.go
+++ b/sysutil/sysenv_test.go
@@ -13,12 +13,13 @@ import (
 func TestSysenv_common(t *testing.T) {
 	ss := sysutil.EnvPaths()
 	assert.NotEmpty(t, ss)
-
 	assert.NotEmpty(t, sysutil.Environ())
 
 	ss = sysutil.SearchPath("go", 3)
 	assert.NotEmpty(t, ss)
 	// dump.P(ss)
+	ss = sysutil.SearchPath("o", 3)
+	assert.NotEmpty(t, ss)
 }
 
 func TestCurrentShell(t *testing.T) {