diff --git a/schala-lang/language/src/symbol_table.rs b/schala-lang/language/src/symbol_table.rs
index 2485047..cae4c9b 100644
--- a/schala-lang/language/src/symbol_table.rs
+++ b/schala-lang/language/src/symbol_table.rs
@@ -8,6 +8,32 @@ use crate::ast;
 use crate::ast::{ItemId, TypeBody, TypeSingletonName, Signature, Statement, StatementKind};
 use crate::typechecking::TypeName;
 
+#[allow(unused_macros)]
+macro_rules! sym_path_kind {
+  (fn) => { ScopeSegmentKind::Function };
+  (ty) => { ScopeSegmentKind::Type };
+  (tr) => { ScopeSegmentKind::Terminal };
+}
+
+#[allow(unused_macros)]
+macro_rules! fqsn {
+  ( $( $name:expr ; $kind:tt),* ) => {
+    {
+      let mut vec = vec![];
+      $(
+        vec.push(ScopeSegment::new(
+            Rc::new($name.to_string()),
+            sym_path_kind!($kind),
+        ));
+      )*
+      FullyQualifiedSymbolName(vec)
+    }
+  };
+}
+
+
+mod test;
+
 type LineNumber = u32;
 type SymbolTrackTable = HashMap<Rc<String>, LineNumber>;
 
@@ -57,29 +83,6 @@ pub enum ScopeSegmentKind {
   //Module
 }
 
-#[allow(unused_macros)]
-macro_rules! fqsn {
-  ( $( $name:expr ; $kind:tt),* ) => {
-    {
-      let mut vec = vec![];
-      $(
-        vec.push(ScopeSegment::new(
-            Rc::new($name.to_string()),  
-            sym_path_kind!($kind),
-        ));
-      )*
-      FullyQualifiedSymbolName(vec)
-    }
-  };
-}
-
-#[allow(unused_macros)]
-macro_rules! sym_path_kind {
-  (fn) => { ScopeSegmentKind::Function };
-  (ty) => { ScopeSegmentKind::Type };
-  (tr) => { ScopeSegmentKind::Terminal };
-}
-
 //cf. p. 150 or so of Language Implementation Patterns
 pub struct SymbolTable {
   symbol_path_to_symbol: HashMap<FullyQualifiedSymbolName, Symbol>,
@@ -313,156 +316,3 @@ impl LocalTypeContext {
   }
 }
 
-
-#[cfg(test)]
-mod symbol_table_tests {
-  use super::*;
-  use crate::util::quick_ast;
-
-  macro_rules! values_in_table {
-    //TODO multiple values
-    ($source:expr, $single_value:expr) => {
-      {
-      let mut symbol_table = SymbolTable::new();
-      let ast = quick_ast($source);
-      symbol_table.add_top_level_symbols(&ast).unwrap();
-      match symbol_table.lookup_by_fqsn($single_value) {
-        Some(_spec) => (),
-        None => panic!(),
-      };
-      }
-    }
-  }
-
-  #[test]
-  fn basic_symbol_table() {
-    values_in_table! { "let a = 10; fn b() { 20 }", &fqsn!("b"; tr) }
-  }
-
-  #[test]
-  fn no_duplicates() {
-    let source = r#"
-    fn a() { 1 }
-    fn b() { 2 }
-    fn a() { 3 }
-    "#;
-    let mut symbol_table = SymbolTable::new();
-    let ast = quick_ast(source);
-    let output = symbol_table.add_top_level_symbols(&ast).unwrap_err();
-    assert!(output.contains("Duplicate"))
-  }
-
-  #[test]
-  fn no_duplicates_2() {
-    let source = r#"
-    let a = 20;
-    let q = 39;
-    let a = 30;
-    "#;
-    let mut symbol_table = SymbolTable::new();
-    let ast = quick_ast(source);
-    let output = symbol_table.add_top_level_symbols(&ast).unwrap_err();
-    assert!(output.contains("Duplicate"))
-  }
-
-  #[test]
-  fn no_duplicates_3() {
-    let source = r#"
-    fn a() {
-      let a = 20
-      let b = 40
-      a + b
-    }
-
-    fn q() {
-      let x = 30
-      let x = 33
-    }
-    "#;
-    let mut symbol_table = SymbolTable::new();
-    let ast = quick_ast(source);
-    let output = symbol_table.add_top_level_symbols(&ast).unwrap_err();
-    assert!(output.contains("Duplicate"))
-  }
-
-  #[test]
-  fn dont_falsely_detect_duplicates() {
-    let source = r#"
-    let a = 20;
-    fn some_func() {
-      let a = 40;
-      77
-    }
-    let q = 39;
-    "#;
-    let mut symbol_table = SymbolTable::new();
-    let ast = quick_ast(source);
-    symbol_table.add_top_level_symbols(&ast).unwrap();
-    assert!(symbol_table.lookup_by_fqsn(&fqsn!["a"; tr]).is_some());
-    assert!(symbol_table.lookup_by_fqsn(&fqsn!["some_func"; fn, "a";tr]).is_some());
-  }
-
-  #[test]
-  fn enclosing_scopes() {
-    let source = r#"
-fn outer_func(x) {
-  fn inner_func(arg) {
-    arg
-  }
-  x + inner_func(x)
-}"#;
-    let mut symbol_table = SymbolTable::new();
-    let ast = quick_ast(source);
-    symbol_table.add_top_level_symbols(&ast).unwrap();
-    assert!(symbol_table.lookup_by_fqsn(&fqsn!("outer_func"; tr)).is_some());
-    assert!(symbol_table.lookup_by_fqsn(&fqsn!("outer_func"; fn, "inner_func"; tr)).is_some());
-  }
-
-  #[test]
-  fn enclosing_scopes_2() {
-    let source = r#"
-fn outer_func(x) {
-  fn inner_func(arg) {
-    arg
-  }
-
-  fn second_inner_func() {
-    fn another_inner_func() {
-    }
-  }
-
-  inner_func(x)
-}"#;
-    let mut symbol_table = SymbolTable::new();
-    let ast = quick_ast(source);
-    symbol_table.add_top_level_symbols(&ast).unwrap();
-    assert!(symbol_table.lookup_by_fqsn(&fqsn!("outer_func"; tr)).is_some());
-    assert!(symbol_table.lookup_by_fqsn(&fqsn!("outer_func"; fn, "inner_func"; tr)).is_some());
-    assert!(symbol_table.lookup_by_fqsn(&fqsn!("outer_func"; fn, "second_inner_func"; tr)).is_some());
-    assert!(symbol_table.lookup_by_fqsn(&fqsn!("outer_func"; fn, "second_inner_func"; fn, "another_inner_func"; tr)).is_some());
-  }
-
-  #[test]
-  fn enclosing_scopes_3() {
-    let source = r#"
-fn outer_func(x) {
-  fn inner_func(arg) {
-    arg
-  }
-
-  fn second_inner_func() {
-    fn another_inner_func() {
-    }
-    fn another_inner_func() {
-    }
-  }
-
-  inner_func(x)
-}"#;
-    let mut symbol_table = SymbolTable::new();
-    let ast = quick_ast(source);
-    let output = symbol_table.add_top_level_symbols(&ast).unwrap_err();
-    assert!(output.contains("Duplicate"))
-  }
-}
-
diff --git a/schala-lang/language/src/symbol_table/test.rs b/schala-lang/language/src/symbol_table/test.rs
new file mode 100644
index 0000000..31d3583
--- /dev/null
+++ b/schala-lang/language/src/symbol_table/test.rs
@@ -0,0 +1,151 @@
+#![cfg(test)]
+
+#[macro_use]
+use super::*;
+use crate::util::quick_ast;
+
+macro_rules! values_in_table {
+  //TODO multiple values
+  ($source:expr, $single_value:expr) => {
+    {
+    let mut symbol_table = SymbolTable::new();
+    let ast = quick_ast($source);
+    symbol_table.add_top_level_symbols(&ast).unwrap();
+    match symbol_table.lookup_by_fqsn($single_value) {
+      Some(_spec) => (),
+      None => panic!(),
+    };
+    }
+  }
+}
+
+#[test]
+fn basic_symbol_table() {
+  values_in_table! { "let a = 10; fn b() { 20 }", &fqsn!("b"; tr) }
+}
+
+#[test]
+fn no_duplicates() {
+  let source = r#"
+  fn a() { 1 }
+  fn b() { 2 }
+  fn a() { 3 }
+  "#;
+  let mut symbol_table = SymbolTable::new();
+  let ast = quick_ast(source);
+  let output = symbol_table.add_top_level_symbols(&ast).unwrap_err();
+  assert!(output.contains("Duplicate"))
+}
+
+#[test]
+fn no_duplicates_2() {
+  let source = r#"
+  let a = 20;
+  let q = 39;
+  let a = 30;
+  "#;
+  let mut symbol_table = SymbolTable::new();
+  let ast = quick_ast(source);
+  let output = symbol_table.add_top_level_symbols(&ast).unwrap_err();
+  assert!(output.contains("Duplicate"))
+}
+
+#[test]
+fn no_duplicates_3() {
+  let source = r#"
+  fn a() {
+    let a = 20
+    let b = 40
+    a + b
+  }
+
+  fn q() {
+    let x = 30
+    let x = 33
+  }
+  "#;
+  let mut symbol_table = SymbolTable::new();
+  let ast = quick_ast(source);
+  let output = symbol_table.add_top_level_symbols(&ast).unwrap_err();
+  assert!(output.contains("Duplicate"))
+}
+
+#[test]
+fn dont_falsely_detect_duplicates() {
+  let source = r#"
+  let a = 20;
+  fn some_func() {
+    let a = 40;
+    77
+  }
+  let q = 39;
+  "#;
+  let mut symbol_table = SymbolTable::new();
+  let ast = quick_ast(source);
+  symbol_table.add_top_level_symbols(&ast).unwrap();
+  assert!(symbol_table.lookup_by_fqsn(&fqsn!["a"; tr]).is_some());
+  assert!(symbol_table.lookup_by_fqsn(&fqsn!["some_func"; fn, "a";tr]).is_some());
+}
+
+#[test]
+fn enclosing_scopes() {
+  let source = r#"
+fn outer_func(x) {
+fn inner_func(arg) {
+  arg
+}
+x + inner_func(x)
+}"#;
+  let mut symbol_table = SymbolTable::new();
+  let ast = quick_ast(source);
+  symbol_table.add_top_level_symbols(&ast).unwrap();
+  assert!(symbol_table.lookup_by_fqsn(&fqsn!("outer_func"; tr)).is_some());
+  assert!(symbol_table.lookup_by_fqsn(&fqsn!("outer_func"; fn, "inner_func"; tr)).is_some());
+}
+
+#[test]
+fn enclosing_scopes_2() {
+  let source = r#"
+fn outer_func(x) {
+fn inner_func(arg) {
+  arg
+}
+
+fn second_inner_func() {
+  fn another_inner_func() {
+  }
+}
+
+inner_func(x)
+}"#;
+  let mut symbol_table = SymbolTable::new();
+  let ast = quick_ast(source);
+  symbol_table.add_top_level_symbols(&ast).unwrap();
+  assert!(symbol_table.lookup_by_fqsn(&fqsn!("outer_func"; tr)).is_some());
+  assert!(symbol_table.lookup_by_fqsn(&fqsn!("outer_func"; fn, "inner_func"; tr)).is_some());
+  assert!(symbol_table.lookup_by_fqsn(&fqsn!("outer_func"; fn, "second_inner_func"; tr)).is_some());
+  assert!(symbol_table.lookup_by_fqsn(&fqsn!("outer_func"; fn, "second_inner_func"; fn, "another_inner_func"; tr)).is_some());
+}
+
+#[test]
+fn enclosing_scopes_3() {
+  let source = r#"
+fn outer_func(x) {
+fn inner_func(arg) {
+  arg
+}
+
+fn second_inner_func() {
+  fn another_inner_func() {
+  }
+  fn another_inner_func() {
+  }
+}
+
+inner_func(x)
+}"#;
+  let mut symbol_table = SymbolTable::new();
+  let ast = quick_ast(source);
+  let output = symbol_table.add_top_level_symbols(&ast).unwrap_err();
+  assert!(output.contains("Duplicate"))
+}