diff --git a/app/test_split_integer.py b/app/test_split_integer.py
index ef3aa668a..2c4a572eb 100644
--- a/app/test_split_integer.py
+++ b/app/test_split_integer.py
@@ -2,20 +2,28 @@
 
 
 def test_sum_of_the_parts_should_be_equal_to_value() -> None:
-    pass
+    assert sum(split_integer(5, 3)) == 5
 
 
 def test_should_split_into_equal_parts_when_value_divisible_by_parts() -> None:
-    pass
+    assert split_integer(6, 3) == [2, 2, 2]
 
 
 def test_should_return_part_equals_to_value_when_split_into_one_part() -> None:
-    pass
+    assert split_integer(5, 1) == [5]
 
 
 def test_parts_should_be_sorted_when_they_are_not_equal() -> None:
-    pass
+    assert split_integer(5, 2) == sorted(split_integer(5, 2))
 
 
 def test_should_add_zeros_when_value_is_less_than_number_of_parts() -> None:
-    pass
+    assert split_integer(3, 7) == [0, 0, 0, 0, 1, 1, 1]
+
+
+def test_returns_exact_number_of_parts() -> None:
+    assert len(split_integer(5, 3)) == 3
+
+
+def test_difference_between_max_and_min_is_not_more_than_one() -> None:
+    assert max(split_integer(5, 4)) - min(split_integer(5, 4)) <= 1