diff --git a/pkg/texttemplate/ast.go b/pkg/texttemplate/ast.go
index 9e7f32b9..99e56313 100644
--- a/pkg/texttemplate/ast.go
+++ b/pkg/texttemplate/ast.go
@@ -49,9 +49,7 @@ func (n *NodeRoot) AsString() string {
 
 func (n *NodeRoot) GetValues() []interface{} {
 	var result []interface{}
-	for _, item := range n.Items {
-		result = append(result, item)
-	}
+	result = append(result, n.Items...)
 	return result
 }
 
diff --git a/pkg/yttlibrary/assert.go b/pkg/yttlibrary/assert.go
index 603f7e4a..5760e9c5 100644
--- a/pkg/yttlibrary/assert.go
+++ b/pkg/yttlibrary/assert.go
@@ -332,9 +332,7 @@ func (m AssertModule) oneNotNullCheck(keys starlark.Sequence) core.StarlarkFunc
 		var keysToCheck []starlark.Value
 
 		if keys == nil {
-			for _, key := range dict.Keys() {
-				keysToCheck = append(keysToCheck, key)
-			}
+			keysToCheck = append(keysToCheck, dict.Keys()...)
 		} else {
 			var key starlark.Value
 			keys := keys.Iterate()