diff --git a/python-code-quality/functionality.py b/python-code-quality/functionality.py
index eb2262cf9c..f64a1c0b4c 100644
--- a/python-code-quality/functionality.py
+++ b/python-code-quality/functionality.py
@@ -2,7 +2,7 @@
 #     return a + b
 
 
-def add_numbers(a: int | float, b: int | float) -> int | float:
+def add_numbers(a: int | float, b: int | float) -> float:
     a, b = float(a), float(b)
     return a + b
 
diff --git a/python-code-quality/testability.py b/python-code-quality/testability.py
index b30de831e4..b185afb176 100644
--- a/python-code-quality/testability.py
+++ b/python-code-quality/testability.py
@@ -1,19 +1,19 @@
 # import pytest
 
 # def greet(name):
-#     print(f"Hello, {name}")
+#     print(f"Hello, {name}!")
 
 
 # def test_greet(capsys):
 #     greet("Alice")
 #     captured = capsys.readouterr()
-#     assert captured.out.strip() == "Hello, Alice"
+#     assert captured.out.strip() == "Hello, Alice!"
 
 
 def greet(name: str) -> str:
-    return f"Hello, {name}"
+    return f"Hello, {name}!"
 
 
 # Easy to test
 def test_greet():
-    assert greet("Alice") == "Hello, Alice"
+    assert greet("Alice") == "Hello, Alice!"