diff --git a/mindarmour/fuzz_testing/fuzzing.py b/mindarmour/fuzz_testing/fuzzing.py
index 3096b8e..dc660cc 100644
--- a/mindarmour/fuzz_testing/fuzzing.py
+++ b/mindarmour/fuzz_testing/fuzzing.py
@@ -53,7 +53,6 @@ def _coverage_gains(pre_coverage, coverages):
 
     Returns:
         - list, coverage gains for mutated samples.
-
         - float, last value in parameter coverages.
     """
     gains = [pre_coverage] + coverages[:-1]
@@ -261,13 +260,9 @@ class Fuzzer:
 
         Returns:
             - list, mutated samples in fuzz_testing.
-
             - list, ground truth labels of mutated samples.
-
             - list, preds of mutated samples.
-
             - list, strategies of mutated samples.
-
             - dict, metrics report of fuzzer.
 
         Raises: