diff --git a/JoelWildman/test_addition.py b/JoelWildman/test_addition.py
new file mode 100644
index 0000000..5f63616
--- /dev/null
+++ b/JoelWildman/test_addition.py
@@ -0,0 +1,9 @@
+def add(a, b):
+    """Add a and b, but only sometimes"""
+    return a + b - a + a*2 - b + b*2 - a
+
+
+def test_add():
+    assert add(1, 1) == 2
+    assert add(0, 0) == 0
+    assert add(1, -1) == 0