diff --git a/mathics/builtin/testing_expressions/list_oriented.py b/mathics/builtin/testing_expressions/list_oriented.py
index 30c0668a3..bc61c0491 100644
--- a/mathics/builtin/testing_expressions/list_oriented.py
+++ b/mathics/builtin/testing_expressions/list_oriented.py
@@ -8,9 +8,9 @@
 from mathics.core.exceptions import InvalidLevelspecError
 from mathics.core.expression import Expression
 from mathics.core.symbols import Atom, SymbolFalse, SymbolTrue
-from mathics.core.systemsymbols import SymbolSubsetQ  # , SymbolSparseArray
+from mathics.core.systemsymbols import SymbolSparseArray, SymbolSubsetQ
 from mathics.eval.parts import python_levelspec
-from mathics.eval.testing_expressions import check_ArrayQ  # , check_SparseArrayQ
+from mathics.eval.testing_expressions import check_ArrayQ, check_SparseArrayQ
 
 
 class ArrayQ(Builtin):
@@ -59,8 +59,8 @@ class ArrayQ(Builtin):
     def eval(self, expr, pattern, test, evaluation: Evaluation):
         "ArrayQ[expr_, pattern_, test_]"
 
-        # if not isinstance(expr, Atom) and expr.head.sameQ(SymbolSparseArray):
-        #    return check_SparseArrayQ(expr, pattern, test, evaluation)
+        if not isinstance(expr, Atom) and expr.head.sameQ(SymbolSparseArray):
+            return check_SparseArrayQ(expr, pattern, test, evaluation)
 
         return check_ArrayQ(expr, pattern, test, evaluation)