diff --git a/lox.t/run.t b/lox.t/run.t
index 6b45990..11cafd4 100644
--- a/lox.t/run.t
+++ b/lox.t/run.t
@@ -56,11 +56,13 @@ file assignment/global.lox
 
 file assignment/grouping.lox
   $ mlox assignment/grouping.lox
-  [1]
 
 
 file assignment/infix_operator.lox
   $ mlox assignment/infix_operator.lox
+  Invalid assignment target
+  found 1 ParserError:
+  ParserError at line 3, column 6: Invalid assignment target
   [1]
 
 
@@ -74,6 +76,9 @@ file assignment/local.lox
 
 file assignment/prefix_operator.lox
   $ mlox assignment/prefix_operator.lox
+  Invalid assignment target
+  found 1 ParserError:
+  ParserError at line 2, column 3: Invalid assignment target
   [1]
 
 
@@ -90,6 +95,7 @@ file assignment/to_this.lox
 
 file assignment/undefined.lox
   $ mlox assignment/undefined.lox
+  RuntimeError at line 1, column 8: tried to assign to undefined variable unknown
   [1]