diff --git a/test/calculus/random/test_expression_generator.py b/test/calculus/random/test_expression_generator.py
new file mode 100644
index 0000000..339c3ec
--- /dev/null
+++ b/test/calculus/random/test_expression_generator.py
@@ -0,0 +1,15 @@
+import mapytex
+
+def test_generate_expression():
+    random_expression = mapytex.random.expression("{a}+{b}")
+    assert type(random_expression).__name__ == "Expression"
+    random_expression = mapytex.random.expression("{a}/{b}")
+    assert type(random_expression).__name__ == "Fraction"
+
+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}")
+    assert type(random_expression).__name__ == "Fraction"
+    assert random_expression.denominator / random_expression.numerator >=1
+