Parse test variable as conditional expression

This was necessary to fix some of the tests for tests which relied
on parentheses in place.

grammar.ebnf

@@ -243,12 +243,12 @@ conditional_expression
     | complex_expression_math2
     | concatenate_expression
     | complex_expression_math1
-    | conditional_expression_parentheses
     | conditional_expression_not
     | conditional_expression_if
     | conditional_expression_logical
     | conditional_expression_operator
     | conditional_expression_test
+    | conditional_expression_parentheses
     | variable_identifier
     ;
 

src/jinja2/new_parser.py

@@ -542,7 +542,7 @@ def parse_conditional_expression_operator(ast):
     )
 
 def parse_conditional_expression_test(ast):
-    node = parse_variable(ast['test_variable'])
+    node = parse_conditional_expression(ast['test_variable'])
     test_function = parse_variable(ast['test_function'])
 
     args = []