diff --git a/node/scalar/magic_constant_test.go b/node/scalar/magic_constant_test.go
new file mode 100644
index 0000000..72b23a6
--- /dev/null
+++ b/node/scalar/magic_constant_test.go
@@ -0,0 +1,30 @@
+package scalar_test
+
+import (
+	"bytes"
+	"testing"
+
+	"github.com/kylelemons/godebug/pretty"
+	"github.com/z7zmey/php-parser/node"
+	"github.com/z7zmey/php-parser/node/scalar"
+	"github.com/z7zmey/php-parser/node/stmt"
+	"github.com/z7zmey/php-parser/parser"
+)
+
+func TestMagicConstant(t *testing.T) {
+	src := `<? __DIR__;`
+
+	expected := &stmt.StmtList{
+		Stmts: []node.Node{
+			&stmt.Expression{
+				Expr: &scalar.MagicConstant{Value: "__DIR__"},
+			},
+		},
+	}
+
+	actual, _, _ := parser.Parse(bytes.NewBufferString(src), "test.php")
+
+	if diff := pretty.Compare(expected, actual); diff != "" {
+		t.Errorf("diff: (-expected +actual)\n%s", diff)
+	}
+}
diff --git a/node/scalar/visitor_test.go b/node/scalar/visitor_test.go
new file mode 100644
index 0000000..fdbaf70
--- /dev/null
+++ b/node/scalar/visitor_test.go
@@ -0,0 +1,103 @@
+package scalar_test
+
+import (
+	"reflect"
+	"testing"
+
+	"github.com/kylelemons/godebug/pretty"
+	"github.com/z7zmey/php-parser/node"
+	"github.com/z7zmey/php-parser/node/scalar"
+)
+
+var nameNodesTests = []struct {
+	node                node.Node // node
+	expectedVisitedKeys []string  // visited keys
+	expectedAttributes  map[string]interface{}
+}{
+	{
+		&scalar.String{Value: "foo"},
+		[]string{},
+		map[string]interface{}{"Value": "foo"},
+	},
+	{
+		&scalar.Lnumber{Value: "0"},
+		[]string{},
+		map[string]interface{}{"Value": "0"},
+	},
+	{
+		&scalar.Dnumber{Value: "0.1"},
+		[]string{},
+		map[string]interface{}{"Value": "0.1"},
+	},
+	{
+		&scalar.MagicConstant{Value: "__DIR__"},
+		[]string{},
+		map[string]interface{}{"Value": "__DIR__"},
+	},
+	{
+		&scalar.EncapsedStringPart{Value: "foo"},
+		[]string{},
+		map[string]interface{}{"Value": "foo"},
+	},
+	{
+		&scalar.Encapsed{Parts: []node.Node{&scalar.EncapsedStringPart{Value: "foo"}}},
+		[]string{"Parts"},
+		nil,
+	},
+}
+
+type visitorMock struct {
+	visitChildren bool
+	visitedKeys   []string
+}
+
+func (v *visitorMock) EnterNode(n node.Node) bool { return v.visitChildren }
+func (v *visitorMock) GetChildrenVisitor(key string) node.Visitor {
+	v.visitedKeys = append(v.visitedKeys, key)
+	return &visitorMock{v.visitChildren, nil}
+}
+func (v *visitorMock) LeaveNode(n node.Node) {}
+
+func TestNameVisitorDisableChildren(t *testing.T) {
+	for _, tt := range nameNodesTests {
+		v := &visitorMock{false, nil}
+		tt.node.Walk(v)
+
+		expected := []string{}
+		actual := v.visitedKeys
+
+		diff := pretty.Compare(expected, actual)
+		if diff != "" {
+			t.Errorf("%s diff: (-expected +actual)\n%s", reflect.TypeOf(tt.node), diff)
+		}
+	}
+}
+
+func TestNameVisitor(t *testing.T) {
+	for _, tt := range nameNodesTests {
+		v := &visitorMock{true, nil}
+		tt.node.Walk(v)
+
+		expected := tt.expectedVisitedKeys
+		actual := v.visitedKeys
+
+		diff := pretty.Compare(expected, actual)
+		if diff != "" {
+			t.Errorf("%s diff: (-expected +actual)\n%s", reflect.TypeOf(tt.node), diff)
+		}
+	}
+}
+
+// test Attributes()
+
+func TestNameAttributes(t *testing.T) {
+	for _, tt := range nameNodesTests {
+		expected := tt.expectedAttributes
+		actual := tt.node.Attributes()
+
+		diff := pretty.Compare(expected, actual)
+		if diff != "" {
+			t.Errorf("%s diff: (-expected +actual)\n%s", reflect.TypeOf(tt.node), diff)
+		}
+	}
+}