diff --git a/lab6/Petrov/test.py b/lab6/Petrov/test.py
new file mode 100644
index 0000000..f4725d3
--- /dev/null
+++ b/lab6/Petrov/test.py
@@ -0,0 +1,29 @@
+import unittest
+import random
+import lab6
+
+
+class TestSorting(unittest.TestCase):
+    def test_trivial(self):
+        arr = [1, 333, 22]
+        res = lab6.radixsort(arr)
+        expected = [1, 22, 333]
+        self.assertFalse(not res)  # check res not empty
+        self.assertEqual(expected, res)
+
+    def test_empty(self):
+        arr = []
+        res = lab6.radixsort(arr)
+        expected = []
+        self.assertEqual(expected, res)
+
+    def test_alot(self):
+        arr = [random.randint(0, 10000) for i in range(100000)]
+        res = lab6.radixsort(arr)
+        arr.sort()
+        self.assertFalse(not res)
+        self.assertEqual(arr, res)
+
+
+if __name__ == '__main__':
+    unittest.main()