diff --git a/examples/pytest-demo/fail_test.py b/examples/pytest-demo/fail_test.py
new file mode 100644
index 0000000000000000000000000000000000000000..dc494b1a7707ae6577aba31e95d0ed6ec729d6bd
--- /dev/null
+++ b/examples/pytest-demo/fail_test.py
@@ -0,0 +1,5 @@
+def square(x):
+    return x * x
+
+def test_the_square_of_negative_5_is_negative_25():
+    assert square(-5) == -25
diff --git a/examples/pytest-demo/num_test.py b/examples/pytest-demo/pass_test.py
similarity index 70%
rename from examples/pytest-demo/num_test.py
rename to examples/pytest-demo/pass_test.py
index 30d8afe4443049566699b83c9783d5a5cedc9e0f..64f0271c0dc1ce290e5d1479ecbbda62d8df290d 100644
--- a/examples/pytest-demo/num_test.py
+++ b/examples/pytest-demo/pass_test.py
@@ -9,6 +9,3 @@ def square(x):
 
 def test_the_square_of_5_is_25():
     assert square(5) == 25
-
-# def test_the_square_of_negative_5_is_negative_25():
-#     assert square(-5) == -25