diff --git a/src/library.gd b/src/library.gd
index 97d13be..e8a6593 100644
--- a/src/library.gd
+++ b/src/library.gd
@@ -10,6 +10,9 @@ extends Node
 func _ready():
 	pass # Replace with function body.
 
+func uppercase(thing):
+	return thing.to_upper()
+
 func echo(thing):
 	return thing
 
diff --git a/test/unit/test_library.gd b/test/unit/test_library.gd
index 266ef8f..299fb53 100644
--- a/test/unit/test_library.gd
+++ b/test/unit/test_library.gd
@@ -9,5 +9,8 @@ func before_each():
 func test_assert_eq_number_equal():
 	assert_eq('asdf', 'asdf', "Should pass")
 
+func test_assert_eq_uppercase():
+	assert_eq("HI MOM", lib.uppercase("hi mom"), "Should uppercase")
+
 func test_assert_eq_echo():
 	assert_eq("hi mom", lib.echo("hi mom"), "Should echo")