diff --git a/src/run.rs b/src/run.rs
index c84a4c6..8f3cf68 100644
--- a/src/run.rs
+++ b/src/run.rs
@@ -88,7 +88,7 @@ impl Eval for Expression {
 #[cfg(test)]
 mod tests {
 	use super::*;
-	use crate::ast;
+	use crate::{ast, types};
 
 	#[test]
 	fn test_consts() {
@@ -104,4 +104,37 @@ mod tests {
 			Some("foobar".into())
 		);
 	}
+
+	#[test]
+	fn test_vars() {
+		let mut scope = Scope::default();
+		let foo = ast::Location::Variable { name: "foo".into() };
+		let bar = ast::Location::Variable { name: "bar".into() };
+		assert_eq!(foo.eval(&mut scope), None);
+		assert_eq!(bar.eval(&mut scope), None);
+		scope.variables.insert("bar".into(), 42.into());
+		assert_eq!(foo.eval(&mut scope), None);
+		assert_eq!(bar.eval(&mut scope), Some(42.into()));
+	}
+
+	#[test]
+	fn test_fields() {
+		let mut scope = Scope::default();
+		let loc = ast::Location::Field {
+			table: Box::new(ast::Location::Variable { name: "foo".into() }),
+			index: Box::new(ast::Expression::Constant(ast::Constant::String(
+				"bar".into(),
+			))),
+		};
+		let foo = types::Table::default();
+		let bar = types::Table::default();
+		scope.variables.insert("foo".into(), foo.clone().into());
+		assert_eq!(loc.eval(&mut scope), None);
+		scope.variables.insert("bar".into(), bar.clone().into());
+		assert_eq!(loc.eval(&mut scope), None);
+		bar.set("foo".into(), Some(666.into()));
+		assert_eq!(loc.eval(&mut scope), None);
+		foo.set("bar".into(), Some(42.into()));
+		assert_eq!(loc.eval(&mut scope), Some(42.into()));
+	}
 }