diff --git a/fuzzers/afl_empty_seeds/fuzzer.py b/fuzzers/afl_empty_seeds/fuzzer.py
index c0d8956eb..a0c00a185 100755
--- a/fuzzers/afl_empty_seeds/fuzzer.py
+++ b/fuzzers/afl_empty_seeds/fuzzer.py
@@ -92,6 +92,7 @@ def check_skip_det_compatible(additional_flags):
         return False
     return True
 
+
 def prepare_empty_corpus(input_corpus):
     if os.path.exists(input_corpus):
         shutil.rmtree(input_corpus)
diff --git a/fuzzers/aflplusplus_empty_seeds/fuzzer.py b/fuzzers/aflplusplus_empty_seeds/fuzzer.py
index 295d4c8f4..1d7c371de 100755
--- a/fuzzers/aflplusplus_empty_seeds/fuzzer.py
+++ b/fuzzers/aflplusplus_empty_seeds/fuzzer.py
@@ -234,6 +234,7 @@ def build(*args):  # pylint: disable=too-many-branches,too-many-statements
         shutil.copy('/afl/afl-frida-trace.so', build_directory)
         shutil.copy('/get_frida_entry.sh', build_directory)
 
+
 def prepare_empty_corpus(input_corpus):
     if os.path.exists(input_corpus):
         shutil.rmtree(input_corpus)
diff --git a/fuzzers/honggfuzz_empty_seeds/fuzzer.py b/fuzzers/honggfuzz_empty_seeds/fuzzer.py
index 642e8d1e0..07101bce0 100644
--- a/fuzzers/honggfuzz_empty_seeds/fuzzer.py
+++ b/fuzzers/honggfuzz_empty_seeds/fuzzer.py
@@ -42,6 +42,7 @@ def prepare_empty_corpus(input_corpus):
     with open(os.path.join(input_corpus, 'a'), 'wb') as f:
         f.write(b'a')
 
+
 def fuzz(input_corpus, output_corpus, target_binary):
     """Run fuzzer."""
 
diff --git a/fuzzers/libafl_empty_seeds/fuzzer.py b/fuzzers/libafl_empty_seeds/fuzzer.py
index 2b31e3d32..a0153f385 100755
--- a/fuzzers/libafl_empty_seeds/fuzzer.py
+++ b/fuzzers/libafl_empty_seeds/fuzzer.py
@@ -16,6 +16,7 @@
 
 import os
 import subprocess
+import shutil
 
 from fuzzers import utils
 
@@ -37,6 +38,7 @@ def prepare_fuzz_environment(input_corpus):
     # Create at least one non-empty seed to start.
     utils.create_seed_file_for_empty_corpus(input_corpus)
 
+
 def prepare_empty_corpus(input_corpus):
     if os.path.exists(input_corpus):
         shutil.rmtree(input_corpus)
diff --git a/fuzzers/libfuzzer_empty_seeds/fuzzer.py b/fuzzers/libfuzzer_empty_seeds/fuzzer.py
index 97c0f221d..bd3a233b8 100755
--- a/fuzzers/libfuzzer_empty_seeds/fuzzer.py
+++ b/fuzzers/libfuzzer_empty_seeds/fuzzer.py
@@ -40,6 +40,7 @@ def fuzz(input_corpus, output_corpus, target_binary):
     run_fuzzer."""
     run_fuzzer(input_corpus, output_corpus, target_binary)
 
+
 def prepare_empty_corpus(input_corpus):
     if os.path.exists(input_corpus):
         shutil.rmtree(input_corpus)