diff --git a/bin/check_samplesheet.py b/bin/check_samplesheet.py
index eaf0d24c..3fd6ff8a 100755
--- a/bin/check_samplesheet.py
+++ b/bin/check_samplesheet.py
@@ -49,7 +49,6 @@ def check_samplesheet(file_in, file_out):
 
     sample_mapping_dict = {}
     with open(file_in, "r", encoding="utf-8-sig") as fin:
-
         ## Check header
         MIN_COLS = 2
         HEADER = ["sample", "fastq_1", "fastq_2", "antibody", "control"]
@@ -156,7 +155,6 @@ def check_samplesheet(file_in, file_out):
                 + "\n"
             )
             for sample in sorted(sample_mapping_dict.keys()):
-
                 ## Check that multiple runs of the same sample are of the same datatype i.e. single-end / paired-end
                 if not all(x[0] == sample_mapping_dict[sample][0][0] for x in sample_mapping_dict[sample]):
                     print_error(
diff --git a/bin/igv_files_to_session.py b/bin/igv_files_to_session.py
index 629e6cc9..6fdcb1a9 100755
--- a/bin/igv_files_to_session.py
+++ b/bin/igv_files_to_session.py
@@ -55,7 +55,6 @@
 
 
 def makedir(path):
-
     if not len(path) == 0:
         try:
             os.makedirs(path)
@@ -72,7 +71,6 @@ def makedir(path):
 
 
 def igv_files_to_session(XMLOut, ListFile, ReplaceFile, Genome, PathPrefix=""):
-
     makedir(os.path.dirname(XMLOut))
 
     replaceFileDict = {}
diff --git a/bin/macs2_merged_expand.py b/bin/macs2_merged_expand.py
index aa401123..28ffb087 100755
--- a/bin/macs2_merged_expand.py
+++ b/bin/macs2_merged_expand.py
@@ -55,7 +55,6 @@
 
 
 def makedir(path):
-
     if not len(path) == 0:
         try:
             os.makedirs(path)
@@ -78,7 +77,6 @@ def makedir(path):
 
 
 def macs2_merged_expand(MergedIntervalTxtFile, SampleNameList, OutFile, isNarrow=False, minReplicates=1):
-
     makedir(os.path.dirname(OutFile))
 
     combFreqDict = {}