diff --git a/schala-lang/language/src/ast/visitor_test.rs b/schala-lang/language/src/ast/visitor_test.rs
index 7c92a7a..7c9246c 100644
--- a/schala-lang/language/src/ast/visitor_test.rs
+++ b/schala-lang/language/src/ast/visitor_test.rs
@@ -22,7 +22,7 @@ impl ASTVisitor for Tester {
 #[test]
 fn foo() {
   let mut tester = Tester { count: 0, float_count: 0 };
-  let ast = quick_ast(r#"
+  let (ast, _) = quick_ast(r#"
 import gragh
 
 let a = 20 + 84
diff --git a/schala-lang/language/src/eval/test.rs b/schala-lang/language/src/eval/test.rs
index 36b8281..c3971b4 100644
--- a/schala-lang/language/src/eval/test.rs
+++ b/schala-lang/language/src/eval/test.rs
@@ -10,10 +10,10 @@ use crate::reduced_ast::reduce;
 use crate::eval::State;
 
 fn evaluate_all_outputs(input: &str) -> Vec<Result<String, String>> {
-  let source_map = Rc::new(RefCell::new(SourceMap::new()));
+  let (mut ast, source_map) = crate::util::quick_ast(input);
+  let source_map = Rc::new(RefCell::new(source_map));
   let symbol_table = Rc::new(RefCell::new(SymbolTable::new(source_map)));
   let mut state = State::new(symbol_table);
-  let mut ast = crate::util::quick_ast(input);
   state.symbol_table_handle.borrow_mut().add_top_level_symbols(&ast).unwrap();
   {
   let mut scope_resolver = ScopeResolver::new(state.symbol_table_handle.clone());
diff --git a/schala-lang/language/src/symbol_table/test.rs b/schala-lang/language/src/symbol_table/test.rs
index 20cea64..7f69c87 100644
--- a/schala-lang/language/src/symbol_table/test.rs
+++ b/schala-lang/language/src/symbol_table/test.rs
@@ -7,9 +7,9 @@ use crate::util::quick_ast;
 use crate::source_map;
 
 fn add_symbols_from_source(src: &str) -> (SymbolTable, Result<(), String>) {
-  let source_map = Rc::new(RefCell::new(source_map::SourceMap::new()));
+  let (ast, source_map) = quick_ast(src);
+  let source_map = Rc::new(RefCell::new(source_map));
   let mut symbol_table = SymbolTable::new(source_map);
-  let ast = quick_ast(src);
   let result = symbol_table.add_top_level_symbols(&ast);
   (symbol_table, result)
 }
@@ -54,15 +54,15 @@ fn no_duplicates() {
 #[test]
 fn no_duplicates_2() {
   let source = r#"
-  let a = 20;
-  let q = 39;
-  let a = 30;
+  let x = 9
+  let a = 20
+  let q = 39
+  let a = 30
   "#;
   let (_, output) = add_symbols_from_source(source);
   let output = output.unwrap_err();
-  println!("OUTPUT: {:?}", output);
-  assert!(output.contains("Duplicate"));
-  assert!(output.contains("Line 3"));
+  assert!(output.contains("Duplicate definition: a"));
+  assert!(output.contains("already defined at 2"));
 }
 
 #[test]
diff --git a/schala-lang/language/src/typechecking.rs b/schala-lang/language/src/typechecking.rs
index ad274f8..0284806 100644
--- a/schala-lang/language/src/typechecking.rs
+++ b/schala-lang/language/src/typechecking.rs
@@ -461,7 +461,7 @@ mod typechecking_tests {
   macro_rules! assert_type_in_fresh_context {
     ($string:expr, $type:expr) => {
       let mut tc = TypeContext::new();
-      let ref ast = crate::util::quick_ast($string);
+      let (ref ast, _) = crate::util::quick_ast($string);
       let ty = tc.typecheck(ast).unwrap();
       assert_eq!(ty, $type)
     }
diff --git a/schala-lang/language/src/util.rs b/schala-lang/language/src/util.rs
index d482cde..51a0847 100644
--- a/schala-lang/language/src/util.rs
+++ b/schala-lang/language/src/util.rs
@@ -48,11 +48,11 @@ impl<'a, T, V> ScopeStack<'a, T, V> where T: Hash + Eq {
 
 /// this is intended for use in tests, and does no error-handling whatsoever
 #[allow(dead_code)]
-pub fn quick_ast(input: &str) -> crate::ast::AST {
+pub fn quick_ast(input: &str) -> (crate::ast::AST, crate::source_map::SourceMap) {
   let mut source_map = crate::source_map::SourceMap::new();
   let tokens = crate::tokenizing::tokenize(input);
   let mut parser = crate::parsing::Parser::new(tokens, &mut source_map);
-  parser.parse().unwrap()
+  (parser.parse().unwrap(), source_map)
 }
 
 #[allow(unused_macros)]