diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/660ac44c7eec868220318297.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/660ac44c7eec868220318297.md
index 4b9310e232a..f76fe641bd9 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/660ac44c7eec868220318297.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-classes-and-objects-by-building-a-sudoku-solver/660ac44c7eec868220318297.md
@@ -14,7 +14,10 @@ Modify the `row_str` comprehension to give a string only when the item is not ze
 The list comprehension assigned to the `row_str` variable should call `str()` on each item `i` in `row` if `i` is truthy, and it should evaluate to `'*'` otherwise.
 
 ```js
-({ test: () => assert(runPython(`_Node(_code).find_class("Board").find_function("__str__").find_for_loops()[0].find_bodies()[0].find_variable("row_str").find_comp_expr().is_equivalent("str(i) if i else '*'")`)) })
+({ test: () => assert(runPython(`
+expressions = ["str(i) if i else '*'","'*' if i == 0 else str(i)","str(i) if i != 0 else '*'"]
+node =_Node(_code).find_class("Board").find_function("__str__").find_for_loops()[0].find_bodies()[0].find_variable("row_str").find_comp_expr()
+any(node.is_equivalent(expr) for expr in expressions)`)) })
 ```
 
 # --seed--