diff --git a/tests/100_datetime.py b/tests/100_datetime.py
new file mode 100644
index 00000000..27a69148
--- /dev/null
+++ b/tests/100_datetime.py
@@ -0,0 +1,13 @@
+import datetime
+
+delta = datetime.timedelta(
+    days=50,
+    seconds=27,
+    microseconds=10,
+    milliseconds=29000,
+    minutes=5,
+    hours=8,
+    weeks=2
+)
+
+assert(str(delta) == 'datetime.timedelta(days=64, seconds=29156, microseconds=10')