diff --git a/lox.t/run.t b/lox.t/run.t
index 8058d4a..0feca4f 100644
--- a/lox.t/run.t
+++ b/lox.t/run.t
@@ -465,7 +465,10 @@ $ mlox for/closure_in_body.lox
 
 
 file for/fun_in_body.lox
-$ mlox for/fun_in_body.lox
+  $ mlox for/fun_in_body.lox
+  found 1 ParserError:
+  ParserError at line 2, column 9: Expected valid expression, got Fun instead
+  [1]
 
 
 file for/return_closure.lox
@@ -517,15 +520,21 @@ file for/var_in_body.lox
   [1]
 
 file function/body_must_be_block.lox
-$ mlox function/body_must_be_block.lox
+  $ mlox function/body_must_be_block.lox
+  found 1 ParserError:
+  ParserError at line 3, column 8: Expected LeftBrace, but got (Number 123.)
+  [1]
 
 
 file function/empty_body.lox
-$ mlox function/empty_body.lox
+  $ mlox function/empty_body.lox
+  nil
 
 
 file function/extra_arguments.lox
-$ mlox function/extra_arguments.lox
+  $ mlox function/extra_arguments.lox
+  RuntimeError at line 6, column 1: Function f has arity 4, but was called with 2 args
+  [1]
 
 
 file function/local_mutual_recursion.lox
@@ -537,11 +546,16 @@ $ mlox function/local_recursion.lox
 
 
 file function/missing_arguments.lox
-$ mlox function/missing_arguments.lox
+  $ mlox function/missing_arguments.lox
+  RuntimeError at line 3, column 1: Function f has arity 1, but was called with 2 args
+  [1]
 
 
 file function/missing_comma_in_parameters.lox
-$ mlox function/missing_comma_in_parameters.lox
+  $ mlox function/missing_comma_in_parameters.lox
+  found 1 ParserError:
+  ParserError at line 3, column 13: Expected RightParen, but got (Identifier "c")
+  [1]
 
 
 file function/mutual_recursion.lox
@@ -557,7 +571,9 @@ $ mlox function/parameters.lox
 
 
 file function/print.lox
-$ mlox function/print.lox
+  $ mlox function/print.lox
+  <fn foo/0>
+  <native fn clock/0>
 
 
 file function/recursion.lox
@@ -565,11 +581,18 @@ $ mlox function/recursion.lox
 
 
 file function/too_many_arguments.lox
-$ mlox function/too_many_arguments.lox
+  $ mlox function/too_many_arguments.lox
+  found 2 ParserErrors:
+  ParserError at line 4, column 5: Can't call with more than 255 arguments
+  ParserError at line 261, column 0: Expected valid expression, got RightBrace instead
+  [1]
 
 
 file function/too_many_parameters.lox
-$ mlox function/too_many_parameters.lox
+  $ mlox function/too_many_parameters.lox
+  found 1 ParserError:
+  ParserError at line 2, column 0: Function f can't have more than 255 arguments
+  [1]
 
 
 file if/class_in_else.lox
@@ -593,11 +616,17 @@ file if/else.lox
 
 
 file if/fun_in_else.lox
-$ mlox if/fun_in_else.lox
+  $ mlox if/fun_in_else.lox
+  found 1 ParserError:
+  ParserError at line 2, column 21: Expected valid expression, got Fun instead
+  [1]
 
 
 file if/fun_in_then.lox
-$ mlox if/fun_in_then.lox
+  $ mlox if/fun_in_then.lox
+  found 1 ParserError:
+  ParserError at line 2, column 10: Expected valid expression, got Fun instead
+  [1]
 
 
 file if/if.lox
@@ -659,11 +688,11 @@ $ mlox inheritance/set_fields_from_base_class.lox
 
 
 file limit/loop_too_large.lox
-$ mlox limit/loop_too_large.lox
+  $ mlox limit/loop_too_large.lox
 
 
 file limit/no_reuse_constants.lox
-$ mlox limit/no_reuse_constants.lox
+  $ mlox limit/no_reuse_constants.lox
 
 
 file limit/stack_overflow.lox
@@ -671,15 +700,15 @@ $ mlox limit/stack_overflow.lox
 
 
 file limit/too_many_constants.lox
-$ mlox limit/too_many_constants.lox
+  $ mlox limit/too_many_constants.lox
 
 
 file limit/too_many_locals.lox
-$ mlox limit/too_many_locals.lox
+  $ mlox limit/too_many_locals.lox
 
 
 file limit/too_many_upvalues.lox
-$ mlox limit/too_many_upvalues.lox
+  $ mlox limit/too_many_upvalues.lox
 
 
 file logical_operator/and.lox
@@ -987,7 +1016,15 @@ file operator/negate_nonnum.lox
 
 
 file operator/not.lox
-$ mlox operator/not.lox
+  $ mlox operator/not.lox
+  false
+  true
+  true
+  false
+  false
+  true
+  false
+  false
 
 
 file operator/not_class.lox
@@ -1225,17 +1262,17 @@ $ mlox this/this_in_top_level_function.lox
 
 
 file variable/collide_with_parameter.lox
-$ mlox variable/collide_with_parameter.lox
+  $ mlox variable/collide_with_parameter.lox
 
 
 file variable/duplicate_local.lox
   $ mlox variable/duplicate_local.lox
-  RuntimeError at line 3, column 2: Tried to define a, but was already defined
+  RuntimeError at line 3, column 2: Tried to define a, but a variable of that name was already defined
   [1]
 
 
 file variable/duplicate_parameter.lox
-$ mlox variable/duplicate_parameter.lox
+  $ mlox variable/duplicate_parameter.lox
 
 
 file variable/early_bound.lox
@@ -1355,7 +1392,10 @@ $ mlox while/closure_in_body.lox
 
 
 file while/fun_in_body.lox
-$ mlox while/fun_in_body.lox
+  $ mlox while/fun_in_body.lox
+  found 1 ParserError:
+  ParserError at line 2, column 13: Expected valid expression, got Fun instead
+  [1]
 
 
 file while/return_closure.lox