diff --git a/fuzzers/aflplusplus_fishfuzz/fuzzer.py b/fuzzers/aflplusplus_fishfuzz/fuzzer.py
index f87aba5b9..ccb200c25 100755
--- a/fuzzers/aflplusplus_fishfuzz/fuzzer.py
+++ b/fuzzers/aflplusplus_fishfuzz/fuzzer.py
@@ -30,13 +30,16 @@ def get_uninstrumented_build_directory(target_directory):
     """Return path to CmpLog target directory."""
     return os.path.join(target_directory, 'uninstrumented')
 
+
 def prepare_tmp_files(tmp_dir):
+    """ Prepare tmp files."""
     if not os.path.isdir(tmp_dir) or os.path.exists(tmp_dir):
         os.mkdir(tmp_dir)
-    os.mkdir('%s/idlog' % (tmp_dir))
-    os.mkdir('%s/cg' % (tmp_dir))
-    os.mkdir('%s/fid' % (tmp_dir))
-    os.system('touch %s/idlog/fid %s/idlog/targid' % (tmp_dir, tmp_dir))
+    os.mkdir(f'%s/idlog' % (tmp_dir))
+    os.mkdir(f'%s/cg' % (tmp_dir))
+    os.mkdir(f'%s/fid' % (tmp_dir))
+    os.system(f'touch %s/idlog/fid %s/idlog/targid' % (tmp_dir, tmp_dir))
+
 
 def set_ff_env():
     # set FishFuzz Env before build
@@ -44,6 +47,7 @@ def set_ff_env():
     os.environ['FF_TMP_DIR'] = os.environ['OUT'] + '/TEMP'
     prepare_tmp_files(os.environ['TMP_DIR'])
 
+
 def build(*args):  # pylint: disable=too-many-branches,too-many-statements
     """Build benchmark."""
     # BUILD_MODES is not already supported by fuzzbench, meanwhile we provide
@@ -173,7 +177,7 @@ def build(*args):  # pylint: disable=too-many-branches,too-many-statements
     if 'eclipser' in build_modes:
         os.environ['FUZZER_LIB'] = '/libStandaloneFuzzTarget.a'
     else:
-        os.environ['FUZZER_LIB'] = '/FishFuzz/afl_driver.o' # '/libAFLDriver.a'
+        os.environ['FUZZER_LIB'] = '/FishFuzz/afl_driver.o'
 
     # Some benchmarks like lcms. (see:
     # https://github.com/mm2/Little-CMS/commit/ab1093539b4287c233aca6a3cf53b234faceb792#diff-f0e6d05e72548974e852e8e55dffc4ccR212)
@@ -252,12 +256,12 @@ def build(*args):  # pylint: disable=too-many-branches,too-many-statements
 
     tmp_dir_dst = os.environ['OUT'] + '/TEMP'
     print('[post_build] generating distance files')
-    # python3 /Fish++/distance/match_function.py -i $FF_TMP_DIR
-    # python3 /Fish++/distance/merge_callgraph.py -i $FF_TMP_DIR
-    # python3 /Fish++/distance/calculate_distance.py -i $FF_TMP_DIR
-    os.system('python3 /FishFuzz/distance/match_function.py -i %s' % (tmp_dir_dst))
-    os.system('python3 /FishFuzz/distance/merge_callgraph.py -i %s' % (tmp_dir_dst))
-    os.system('python3 /FishFuzz/distance/calculate_distance.py -i %s' % (tmp_dir_dst))
+    os.system('python3 /FishFuzz/distance/match_function.py -i %s' %
+              (tmp_dir_dst))
+    os.system('python3 /FishFuzz/distance/merge_callgraph.py -i %s' %
+              (tmp_dir_dst))
+    os.system('python3 /FishFuzz/distance/calculate_distance.py -i %s' %
+              (tmp_dir_dst))
 
 
 # pylint: disable=too-many-arguments