diff --git a/tests/test_fail.py b/tests/test_fail.py
new file mode 100644
index 0000000..78acee9
--- /dev/null
+++ b/tests/test_fail.py
@@ -0,0 +1,18 @@
+from fastapi.testclient import TestClient
+from main import app
+
+client = TestClient(app)
+
+
+def test_failing_root():
+    # This will fail because of the wrong expected message
+    response = client.get("/")
+    assert response.status_code == 200
+    assert response.json() == {"message": "Wrong Message"}
+
+
+def test_failing_item():
+    # This will fail because of the missing field assertion
+    response = client.get("/items/99")
+    assert response.status_code == 200
+    assert "nonexistent_field" in response.json()
diff --git a/tests/test_success.py b/tests/test_success.py
deleted file mode 100644
index 54a7c96..0000000
--- a/tests/test_success.py
+++ /dev/null
@@ -1,17 +0,0 @@
-from fastapi.testclient import TestClient
-from main import app
-
-client = TestClient(app)
-
-def test_read_root():
-    response = client.get("/")
-    assert response.status_code == 200
-    assert response.json() == {"message": "Hello World"}
-
-def test_read_item():
-    response = client.get("/items/42")
-    assert response.status_code == 200
-    assert response.json() == {
-        "item_id": 42,
-        "message": "Item details"
-    }