+
+## --------------------------- ##
+## Boolean %define variables. ##
+## --------------------------- ##
+
+AT_SETUP([Boolean %define variables])
+
+AT_DATA([Input.y],
+[[%language "Java"
+%define public "maybe"
+%define parser_class_name "Input"
+%%
+start: ;
+]])
+
+AT_CHECK([[bison Input.y]], [1], [],
+[[Input.y:2.9-14: invalid value for %define boolean variable `public'
+]])
+
+AT_CLEANUP