diff --git a/flags_test.go b/flags_test.go
index 5489278..5bffca3 100644
--- a/flags_test.go
+++ b/flags_test.go
@@ -22,7 +22,7 @@ func TestBindFlagValueSet(t *testing.T) {
 		"endpoint": "/public",
 	}
 
-	for name, _ := range testValues {
+	for name := range testValues {
 		testValues[name] = flagSet.String(name, "", "test")
 	}
 
diff --git a/viper.go b/viper.go
index 3efb301..84240ea 100644
--- a/viper.go
+++ b/viper.go
@@ -1170,36 +1170,36 @@ func AllKeys() []string { return v.AllKeys() }
 func (v *Viper) AllKeys() []string {
 	m := map[string]struct{}{}
 
-	for key, _ := range v.defaults {
+	for key := range v.defaults {
 		m[strings.ToLower(key)] = struct{}{}
 	}
 
-	for key, _ := range v.pflags {
+	for key := range v.pflags {
 		m[strings.ToLower(key)] = struct{}{}
 	}
 
-	for key, _ := range v.env {
+	for key := range v.env {
 		m[strings.ToLower(key)] = struct{}{}
 	}
 
-	for key, _ := range v.config {
+	for key := range v.config {
 		m[strings.ToLower(key)] = struct{}{}
 	}
 
-	for key, _ := range v.kvstore {
+	for key := range v.kvstore {
 		m[strings.ToLower(key)] = struct{}{}
 	}
 
-	for key, _ := range v.override {
+	for key := range v.override {
 		m[strings.ToLower(key)] = struct{}{}
 	}
 
-	for key, _ := range v.aliases {
+	for key := range v.aliases {
 		m[strings.ToLower(key)] = struct{}{}
 	}
 
 	a := []string{}
-	for x, _ := range m {
+	for x := range m {
 		a = append(a, x)
 	}
 
diff --git a/viper_test.go b/viper_test.go
index 0c0c7e5..b207fb5 100644
--- a/viper_test.go
+++ b/viper_test.go
@@ -491,7 +491,7 @@ func TestBindPFlags(t *testing.T) {
 		"endpoint": "/public",
 	}
 
-	for name, _ := range testValues {
+	for name := range testValues {
 		testValues[name] = flagSet.String(name, "", "test")
 	}