diff --git a/pytest.ini b/pytest.ini
index bddc2d2..6b3b568 100644
--- a/pytest.ini
+++ b/pytest.ini
@@ -1,3 +1,3 @@
 [pytest]
-addopts = --cov=catinabox --cov-report=term-missing --pep8 --flakes --mccabe
+addopts = --cov=catinabox --cov-report=term-missing --flakes --mccabe
 testpaths = tests catinabox
diff --git a/tests/test_catmath.py b/tests/test_catmath.py
index ced6358..03e8d1b 100644
--- a/tests/test_catmath.py
+++ b/tests/test_catmath.py
@@ -2,18 +2,21 @@
 
 
 def test__cat_years_to_hooman_years__middle_age__succeeds():
-    assert True
+    assert catmath.cat_years_to_hooman_years(8) == 40
 
 
 def test__cat_years_to_hooman_years__less_than_one_year__succeeds():
-    assert True
+    assert catmath.cat_years_to_hooman_years(0.5) == 2.5
 
 
 def test__cat_years_to_hooman_years__0__returns_0():
-    assert True
+    assert catmath.cat_years_to_hooman_years(0) == 0
 
 
 # BONUS MATERIAL FOR STEP 2
 
 def test__is_cat_leap_year__succeeds():
+    assert catmath.is_cat_leap_year(2017) is False
     assert catmath.is_cat_leap_year(2016) is True
+    assert catmath.is_cat_leap_year(1800) is False
+    assert catmath.is_cat_leap_year(2000) is True