diff --git a/testing/pytest/test_employee_pytest.py b/testing/pytest/test_employee_pytest.py
index b08f2cf..0c590a3 100644
--- a/testing/pytest/test_employee_pytest.py
+++ b/testing/pytest/test_employee_pytest.py
@@ -3,6 +3,11 @@
 import pytest
 from employee import Employee
 
+# seeded at import time so parametrize decorator gets deterministic values (avoid )
+# without seed, random.randint() produces different values each run (flaky tests)
+_rng = random.Random(42)
+_random_test_cases = [(_rng.randint(0, 100),) * 2 for _ in range(9)]
+
 
 # pytest doesn't require TestCase to inherit from anything
 class EmployeeTestCase:
@@ -40,15 +45,7 @@ def test_pay(employee):
         (100, 100),
         (1999, 1999),
         (2022, 2022),
-        tuple([random.randint(0, 100)] * 2),
-        tuple([random.randint(0, 100)] * 2),
-        tuple([random.randint(0, 100)] * 2),
-        tuple([random.randint(0, 100)] * 2),
-        tuple([random.randint(0, 100)] * 2),
-        tuple([random.randint(0, 100)] * 2),
-        tuple([random.randint(0, 100)] * 2),
-        tuple([random.randint(0, 100)] * 2),
-        tuple([random.randint(0, 100)] * 2),
+        *_random_test_cases,
     ],
 )
 def test_very_simple(given_value, expected_value):