diff --git a/testing/test_states.py b/testing/test_states.py
new file mode 100644
index 0000000..8da3763
--- /dev/null
+++ b/testing/test_states.py
@@ -0,0 +1,33 @@
+import pytest
+from sum import sum
+
+
+def test_pass():
+    assert sum(1, 2) == 3
+
+
+def test_fail():
+    assert sum(1, 2) == 4
+
+
+# Xfailed
+@pytest.mark.xfail()
+def test_sum_negative():
+    assert sum(1, 2) == 4
+
+
+@pytest.mark.xfail()
+def test_sum_negative_raise():
+    raise Exception("This test is expected to fail")
+
+
+# XPassed
+@pytest.mark.xfail()
+def test_sum_positive():
+    assert sum(1, 2) == 3
+
+
+# Skipped
+@pytest.mark.skip(reason="Do not run this test")
+def test_sum_skip():
+    assert sum(1, 2) == 3