diff --git a/ast/tests/expression.rs b/ast/tests/expression.rs
index c168d34750..99081e0004 100644
--- a/ast/tests/expression.rs
+++ b/ast/tests/expression.rs
@@ -1,3 +1,19 @@
+// Copyright (C) 2019-2020 Aleo Systems Inc.
+// This file is part of the Leo library.
+
+// The Leo library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// The Leo library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with the Leo library. If not, see <https://www.gnu.org/licenses/>.
+
 use leo_ast::ast::{LanguageParser, Rule};
 
 use pest::*;
diff --git a/ast/tests/function.rs b/ast/tests/function.rs
index f35ed1f47e..942976fb10 100644
--- a/ast/tests/function.rs
+++ b/ast/tests/function.rs
@@ -1,3 +1,19 @@
+// Copyright (C) 2019-2020 Aleo Systems Inc.
+// This file is part of the Leo library.
+
+// The Leo library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// The Leo library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with the Leo library. If not, see <https://www.gnu.org/licenses/>.
+
 use leo_ast::ast::{LanguageParser, Rule};
 
 use pest::*;
diff --git a/ast/tests/tuple.rs b/ast/tests/tuple.rs
index 4b550214fe..3b2825981c 100644
--- a/ast/tests/tuple.rs
+++ b/ast/tests/tuple.rs
@@ -1,3 +1,19 @@
+// Copyright (C) 2019-2020 Aleo Systems Inc.
+// This file is part of the Leo library.
+
+// The Leo library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// The Leo library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with the Leo library. If not, see <https://www.gnu.org/licenses/>.
+
 use leo_ast::ast::{LanguageParser, Rule};
 
 use pest::*;