diff --git a/test/test_half_assignments.coffee b/test/test_half_assignments.coffee
index 6752b3ae..14b70854 100644
--- a/test/test_half_assignments.coffee
+++ b/test/test_half_assignments.coffee
@@ -33,4 +33,13 @@ ok val is 'other'
 val: null
 val: ? 'value'
 
-ok val is 'value'
\ No newline at end of file
+ok val is 'value'
+
+
+val: 6
+val: -(10)
+
+ok val is -10
+
+val: - (10)
+ok val is -20
\ No newline at end of file