diff --git a/schala-lang/language/src/symbol_table/mod.rs b/schala-lang/language/src/symbol_table/mod.rs
index 29aa210..7d83fa1 100644
--- a/schala-lang/language/src/symbol_table/mod.rs
+++ b/schala-lang/language/src/symbol_table/mod.rs
@@ -211,7 +211,6 @@ impl SymbolTable {
             spec,
             def_id,
         });
-        println!("In add_symbol(), adding: {:?}", symbol);
         self.symbol_trie.insert(&fqsn);
         self.fqsn_to_symbol.insert(fqsn, symbol.clone());
         self.id_to_symbol.insert(*id, symbol);
diff --git a/schala-lang/language/src/symbol_table/test.rs b/schala-lang/language/src/symbol_table/test.rs
index 4489628..d25c005 100644
--- a/schala-lang/language/src/symbol_table/test.rs
+++ b/schala-lang/language/src/symbol_table/test.rs
@@ -1,12 +1,13 @@
 #![cfg(test)]
-use super::*;
-use crate::util::quick_ast;
 use assert_matches::assert_matches;
 
+use super::*;
+use crate::{tokenizing::Location, util::quick_ast};
+
 fn add_symbols(src: &str) -> (SymbolTable, Result<(), Vec<SymbolError>>) {
     let ast = quick_ast(src);
     let mut symbol_table = SymbolTable::new();
-    let mut type_context =  crate::type_inference::TypeContext::new();
+    let mut type_context = crate::type_inference::TypeContext::new();
     let result = symbol_table.process_ast(&ast, &mut type_context);
     (symbol_table, result)
 }
@@ -30,16 +31,8 @@ fn basic_symbol_table() {
     let (symbols, _) = add_symbols(src);
 
     symbols.types.table.get(&make_fqsn(&["Option"])).unwrap();
-    symbols
-        .types
-        .table
-        .get(&make_fqsn(&["Option", "Some"]))
-        .unwrap();
-    symbols
-        .types
-        .table
-        .get(&make_fqsn(&["Option", "None"]))
-        .unwrap();
+    symbols.types.table.get(&make_fqsn(&["Option", "Some"])).unwrap();
+    symbols.types.table.get(&make_fqsn(&["Option", "None"])).unwrap();
 }
 
 #[test]
@@ -76,6 +69,26 @@ fn no_variable_definition_duplicates() {
     );
 }
 
+#[test]
+fn no_type_definition_duplicates() {
+    let source = r#"
+  let x = 9
+  type Food = Japchae | Burrito | Other
+  type Food = GoodJapchae | Breadfruit
+  "#;
+    let (_, output) = add_symbols(source);
+    let errs = output.unwrap_err();
+    let err = &errs[0];
+
+    match err {
+        SymbolError::DuplicateName { location, prev_name } => {
+            assert_eq!(prev_name, &Fqsn::from_strs(&["Food"]));
+            assert_eq!(location, &Location { line_num: 2, char_num: 2 });
+        }
+        _ => panic!(),
+    }
+}
+
 #[test]
 fn no_variable_definition_duplicates_in_function() {
     let source = r#"
@@ -112,11 +125,7 @@ fn dont_falsely_detect_duplicates() {
     let (symbols, _) = add_symbols(source);
 
     assert!(symbols.fq_names.table.get(&make_fqsn(&["a"])).is_some());
-    assert!(symbols
-        .fq_names
-        .table
-        .get(&make_fqsn(&["some_func", "a"]))
-        .is_some());
+    assert!(symbols.fq_names.table.get(&make_fqsn(&["some_func", "a"])).is_some());
 }
 
 #[test]
@@ -129,16 +138,8 @@ fn inner_func(arg) {
 x + inner_func(x)
 }"#;
     let (symbols, _) = add_symbols(source);
-    assert!(symbols
-        .fq_names
-        .table
-        .get(&make_fqsn(&["outer_func"]))
-        .is_some());
-    assert!(symbols
-        .fq_names
-        .table
-        .get(&make_fqsn(&["outer_func", "inner_func"]))
-        .is_some());
+    assert!(symbols.fq_names.table.get(&make_fqsn(&["outer_func"])).is_some());
+    assert!(symbols.fq_names.table.get(&make_fqsn(&["outer_func", "inner_func"])).is_some());
 }
 
 #[test]
@@ -157,29 +158,13 @@ fn second_inner_func() {
 inner_func(x)
 }"#;
     let (symbols, _) = add_symbols(source);
+    assert!(symbols.fq_names.table.get(&make_fqsn(&["outer_func"])).is_some());
+    assert!(symbols.fq_names.table.get(&make_fqsn(&["outer_func", "inner_func"])).is_some());
+    assert!(symbols.fq_names.table.get(&make_fqsn(&["outer_func", "second_inner_func"])).is_some());
     assert!(symbols
         .fq_names
         .table
-        .get(&make_fqsn(&["outer_func"]))
-        .is_some());
-    assert!(symbols
-        .fq_names
-        .table
-        .get(&make_fqsn(&["outer_func", "inner_func"]))
-        .is_some());
-    assert!(symbols
-        .fq_names
-        .table
-        .get(&make_fqsn(&["outer_func", "second_inner_func"]))
-        .is_some());
-    assert!(symbols
-        .fq_names
-        .table
-        .get(&make_fqsn(&[
-            "outer_func",
-            "second_inner_func",
-            "another_inner_func"
-        ]))
+        .get(&make_fqsn(&["outer_func", "second_inner_func", "another_inner_func"]))
         .is_some());
 }
 
@@ -218,11 +203,7 @@ fn item()
     let (symbols, _) = add_symbols(source);
     symbols.fq_names.table.get(&make_fqsn(&["stuff"])).unwrap();
     symbols.fq_names.table.get(&make_fqsn(&["item"])).unwrap();
-    symbols
-        .fq_names
-        .table
-        .get(&make_fqsn(&["stuff", "item"]))
-        .unwrap();
+    symbols.fq_names.table.get(&make_fqsn(&["stuff", "item"])).unwrap();
 }
 
 #[test]