diff --git a/src/ai/fitness/bumpiness.py b/src/ai/fitness/bumpiness.py
new file mode 100644
index 0000000..e735a0a
--- /dev/null
+++ b/src/ai/fitness/bumpiness.py
@@ -0,0 +1,17 @@
+from typing import Optional
+
+import numpy as np
+
+from .peaks import get_peaks
+
+
+def get_bumpiness(
+    peaks: Optional[np.ndarray], field: Optional[np.ndarray] = None
+) -> int:
+    if peaks is None and field is None:
+        raise ValueError("peaks and field cannot both be None")
+    elif peaks is None:
+        peaks = get_peaks(field)
+
+    differences = np.abs(np.diff(peaks))
+    return int(np.sum(differences))
diff --git a/src/ai/fitness/fitness.py b/src/ai/fitness/fitness.py
index 23d9a15..d45a5f4 100644
--- a/src/ai/fitness/fitness.py
+++ b/src/ai/fitness/fitness.py
@@ -13,10 +13,6 @@ def calculate_fitness(game: Game) -> float:
     return fitness
 
 
-def get_bumpiness(field: np.ndarray) -> int:
-    pass
-
-
 def get_holes(field: np.ndarray) -> int:
     pass
 
diff --git a/tests/ai/test_fitness.py b/tests/ai/test_fitness.py
index 98f90a2..9c53c1b 100644
--- a/tests/ai/test_fitness.py
+++ b/tests/ai/test_fitness.py
@@ -1,10 +1,10 @@
 import unittest
 
 import numpy as np
+from ai.fitness.bumpiness import get_bumpiness
 from ai.fitness.peaks import get_peaks_sum
 from ai.fitness.transitions import (
     get_col_transition,
-    get_col_transitions2,
     get_row_transition,
 )
 
@@ -39,7 +39,12 @@ class TestFitness(unittest.TestCase):
         for field, answer in zip(self.fields, answers):
             self.assertEqual(get_row_transition(field), answer)
 
-    def test_get_col_transistions2(self):
+    def test_get_col_transistions(self):
         answers = (5, 0, 1)
         for field, answer in zip(self.fields, answers):
             self.assertEqual(get_col_transition(field), answer)
+
+    def test_get_bumpiness(self):
+        answers = (8, 0, 2)
+        for field, answer in zip(self.fields, answers):
+            self.assertEqual(get_bumpiness(field), answer)