diff --git a/test/calculus/random/test_expression_generator.py b/test/calculus/random/test_expression_generator.py
index 339c3ec..c941f77 100644
--- a/test/calculus/random/test_expression_generator.py
+++ b/test/calculus/random/test_expression_generator.py
@@ -9,7 +9,7 @@ def test_generate_expression():
 def test_generate_expression_calculus():
     random_expression = mapytex.random.expression("{a}+{a*b}")
     assert type(random_expression).__name__ == "Expression"
-    random_expression = mapytex.random.expression("{a}/{a*b}")
+    random_expression = mapytex.random.expression("{a}/{a*b}", global_config={"min_max": (2, 10)})
     assert type(random_expression).__name__ == "Fraction"
-    assert random_expression.denominator / random_expression.numerator >=1
+    assert random_expression.numerator / random_expression.denominator <= 1