diff --git a/test_times.py b/test_times.py
new file mode 100644
index 0000000..dfa0266
--- /dev/null
+++ b/test_times.py
@@ -0,0 +1,8 @@
+from times import compute_overlap_time, time_range 
+
+def test_given_input():
+    large = time_range("2010-01-12 10:00:00", "2010-01-12 12:00:00")
+    short = time_range("2010-01-12 10:30:00", "2010-01-12 10:45:00", 2, 60)
+    result = compute_overlap_time(large, short)
+    expected = [('2010-01-12 10:30:00', '2010-01-12 10:37:00'), ('2010-01-12 10:38:00', '2010-01-12 10:45:00')]
+    assert result == expected
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