diff --git a/assignments/a3/a3_part4_tests.py b/assignments/a3/a3_part4_tests.py
index 71548f3..2342433 100644
--- a/assignments/a3/a3_part4_tests.py
+++ b/assignments/a3/a3_part4_tests.py
@@ -28,11 +28,11 @@ class TestCalculateMr:
 
     def test_equation_3a_branch(self) -> None:
         """Test the branch calculate_mr that contains Equation 3a."""
-        # TODO: Complete this unit test and remove this TODO
+        assert 123.82 == pytest.approx(ffwi.calculate_mr(2.4, 80))
 
     def test_equation_3b_branch(self) -> None:
         """Test the branch calculate_mr that contains Equation 3b."""
-        # TODO: Complete this unit test and remove this TODO
+        assert 182.80 == pytest.approx(ffwi.calculate_mr(2.4, 155))
 
 
 class TestCalculateM: