diff --git a/gitgoing/gitgoing.py b/gitgoing/gitgoing.py
index 375b900..7e8b6a8 100755
--- a/gitgoing/gitgoing.py
+++ b/gitgoing/gitgoing.py
@@ -57,7 +57,7 @@ def cv(x):
     cv : float
         The coefficient of variation of the entire array
     """
-    return mean_plus_one(x)/std_plus_one(x)
+    return std_plus_one(x)/mean_plus_one(x)
 
 def is_neuron_component(component):
-    return component in NEURON_COMPONENTS
\ No newline at end of file
+    return component in NEURON_COMPONENTS
diff --git a/tests/test_gitgoing.py b/tests/test_gitgoing.py
index 5d4b76c..0362998 100755
--- a/tests/test_gitgoing.py
+++ b/tests/test_gitgoing.py
@@ -37,14 +37,13 @@ def test_std_plus_one(x_norm):
     true_std = np.std(x_norm) + 1
     assert test_std == true_std
 
-# def test_cv_broken(x_norm):
-#     from gitgoing.gitgoing import std_plus_one, mean_plus_one, cv
-#
-#     test_cv = cv(x_norm)
-#     true_cv = std_plus_one(x_norm)/mean_plus_one(x_norm)
-#
-#     # This test will fail
-#     assert test_cv == true_cv
+def test_cv_broken(x_norm):
+    from gitgoing.gitgoing import std_plus_one, mean_plus_one, cv
+
+    test_cv = cv(x_norm)
+    true_cv = std_plus_one(x_norm)/mean_plus_one(x_norm)
+
+    assert test_cv == true_cv
 
 @pytest.fixture(params=['soma', 'axon', 'synapse', 'dendrite',
                         pytest.mark.xfail('fibroblast')])
@@ -56,4 +55,4 @@ def test_is_neuron_component(neuron_component):
 
     test_neuron_component = is_neuron_component(neuron_component)
     true_neuron_component = neuron_component in NEURON_COMPONENTS
-    assert test_neuron_component == true_neuron_component
\ No newline at end of file
+    assert test_neuron_component == true_neuron_component