diff --git a/ast/expressions.go b/ast/expressions.go
index cd1edd2..cd82ea4 100644
--- a/ast/expressions.go
+++ b/ast/expressions.go
@@ -1,8 +1,8 @@
 package ast
 
-type ExpressionNode interface {
+type TestlistStarExpressionChildNode interface {
 	Node
-	exprNode()
+	testlistStarExpressionChild()
 }
 
 type TestlistStarExpression struct {
@@ -14,3 +14,7 @@ func NewTestListStarExpression() *TestlistStarExpression {
 	node.initBaseNode(TESTLIST_STAR_EXPR)
 	return node
 }
+
+func (node *TestlistStarExpression) SetChild(n TestlistStarExpressionChildNode) {
+	node.ParentNode.SetChild(n)
+}
diff --git a/ast/smallstatements.go b/ast/smallstatements.go
index a7156e4..7460ce2 100644
--- a/ast/smallstatements.go
+++ b/ast/smallstatements.go
@@ -1,8 +1,8 @@
 package ast
 
-type SmallStatementNode interface {
+type SmallStatementChildNode interface {
 	Node
-	smallStmtNode()
+	smallStmtChildNode()
 }
 
 type SmallStatement struct {
@@ -15,7 +15,7 @@ func NewSmallStatement() *SmallStatement {
 	return node
 }
 
-func (node *SmallStatement) SetChild(n SmallStatementNode) { node.ParentNode.SetChild(n) }
+func (node *SmallStatement) SetChild(n SmallStatementChildNode) { node.ParentNode.SetChild(n) }
 
 type ExpressionStatement struct {
 	ParentNode
@@ -28,5 +28,5 @@ func NewExpressionStatement() *ExpressionStatement {
 	return node
 }
 
-func (node *ExpressionStatement) smallStmtNode()                     {}
+func (node *ExpressionStatement) smallStmtChildNode()                {}
 func (node *ExpressionStatement) SetChild(n *TestlistStarExpression) { node.ParentNode.SetChild(n) }
diff --git a/ast/statements.go b/ast/statements.go
index 51a103f..2474025 100644
--- a/ast/statements.go
+++ b/ast/statements.go
@@ -1,8 +1,8 @@
 package ast
 
-type StatementNode interface {
+type StatementChildNode interface {
 	Node
-	stmtNode()
+	stmtChildNode()
 }
 
 type Statement struct {
@@ -15,7 +15,7 @@ func NewStatement() *Statement {
 	return node
 }
 
-func (node *Statement) SetChild(n StatementNode) { node.ParentNode.SetChild(n) }
+func (node *Statement) SetChild(n StatementChildNode) { node.ParentNode.SetChild(n) }
 
 type SimpleStatement struct {
 	ListNode
@@ -28,7 +28,7 @@ func NewSimpleStatement() *SimpleStatement {
 	return node
 }
 
-func (node *SimpleStatement) stmtNode()                {}
+func (node *SimpleStatement) stmtChildNode()           {}
 func (node *SimpleStatement) Append(n *SmallStatement) { node.ListNode.Append(n) }
 
 type CompoundStatement struct {
@@ -40,4 +40,4 @@ func NewCompoundStatement() *CompoundStatement {
 	node.initBaseNode(COMPOUND_STMT)
 	return node
 }
-func (node *CompoundStatement) stmtNode() {}
+func (node *CompoundStatement) stmtChildNode() {}
diff --git a/ast/tests.go b/ast/tests.go
index a3a5ba0..9a188fd 100644
--- a/ast/tests.go
+++ b/ast/tests.go
@@ -1,8 +1,8 @@
 package ast
 
-type TestNode interface {
+type TestChildNode interface {
 	Node
-	test()
+	testChild()
 }
 
 type Test struct {
@@ -15,4 +15,23 @@ func NewTest() *Test {
 	return node
 }
 
-func (node *Test) SetChild(n TestNode) { node.ParentNode.SetChild(n) }
+func (node *Test) testlistStarExpressionChild() {}
+func (node *Test) SetChild(n TestChildNode)     { node.ParentNode.SetChild(n) }
+
+type OrTestChildNode interface {
+	Node
+	orTestChild()
+}
+
+type OrTest struct {
+	ListNode
+}
+
+func NewOrTest() *OrTest {
+	node := &OrTest{}
+	node.initBaseNode(OR_TEST)
+	return node
+}
+
+func (node *OrTest) testChild()               {}
+func (node *OrTest) Append(n OrTestChildNode) { node.ListNode.Append(n) }
diff --git a/parser/parser.go b/parser/parser.go
index 8fa0795..00b2b6e 100644
--- a/parser/parser.go
+++ b/parser/parser.go
@@ -50,6 +50,12 @@ func (parser *Parser) parseCompoundStatement() *ast.CompoundStatement {
 	return compoundStmt
 }
 
+// or_test: and_test ('or' and_test)*
+func (parser *Parser) parseOrTest() *ast.OrTest {
+	orTest := ast.NewOrTest()
+	return orTest
+}
+
 // test: or_test ['if' or_test 'else' test] | lambdef
 func (parser *Parser) parseTest() *ast.Test {
 	test := ast.NewTest()
@@ -60,7 +66,7 @@ func (parser *Parser) parseTest() *ast.Test {
 func (parser *Parser) parseTestlistStarExpression() *ast.TestlistStarExpression {
 	testlistStarExpression := ast.NewTestListStarExpression()
 
-	var expr ast.Node
+	var expr ast.TestlistStarExpressionChildNode
 	expr = parser.parseTest()
 	if expr == nil {
 		return nil
@@ -86,7 +92,7 @@ func (parser *Parser) parseExpressionStatement() *ast.ExpressionStatement {
 func (parser *Parser) parseSmallStatment() *ast.SmallStatement {
 	smallStmt := ast.NewSmallStatement()
 
-	var stmt ast.SmallStatementNode
+	var stmt ast.SmallStatementChildNode
 	stmt = parser.parseExpressionStatement()
 	if stmt != nil {
 		smallStmt.SetChild(stmt)
@@ -124,7 +130,7 @@ func (parser *Parser) parseSimpleStatement() *ast.SimpleStatement {
 
 // stmt: simple_stmt | compound_stmt
 func (parser *Parser) parseStatement() *ast.Statement {
-	var next ast.StatementNode
+	var next ast.StatementChildNode
 	next = parser.parseSimpleStatement()
 	if next == nil {
 		next = parser.parseCompoundStatement()